Pacemaker nursing: types, modes, malfunction, and patient education

A pacemaker is an electronic device that delivers controlled electrical impulses to the heart muscle when the heart’s native conduction system fails to produce an adequate heart rate. Pacemaker nursing spans everything from emergent transcutaneous pacing at the bedside to long-term management of permanent implantable devices — and the NCLEX tests it heavily across the clinical skill, critical care, and patient education domains.

This guide covers the full spectrum: pacemaker types and indications, the NBG pacemaker code, how to recognize and troubleshoot pacemaker malfunction, bedside monitoring principles, and the patient education a nurse must provide after permanent device implantation.

Pacemaker types and indications

Pacemakers are classified first by their permanence (temporary vs permanent) and then by their route of delivery. Understanding where each type sits on the clinical spectrum helps you anticipate the appropriate nursing response.

When pacing is indicated:

The common thread across all pacing indications is a heart rate or conduction pattern that produces hemodynamic compromise or carries a high risk of deterioration. Key NCLEX-tested indications include:

Symptomatic bradycardia — any bradycardia causing hypotension, altered mental status, chest pain, syncope, or acute heart failure. Rate alone does not mandate pacing; symptoms do.
Sick sinus syndrome — dysfunction of the sinoatrial (SA) node producing unpredictable bradycardia, sinus arrest, or tachy-brady alternation
Complete heart block (3rd-degree AV block) — the atria and ventricles depolarize independently; ventricular rate is determined by a slow junctional or ventricular escape rhythm, often 20–40 bpm
2nd-degree AV block, Mobitz type II — unpredictable dropped beats with a consistent PR interval; carries high risk of progressing to complete heart block and requires pacing even when asymptomatic
Post-MI AV block — new bundle branch blocks or high-degree AV blocks after anterior MI carry a particularly high risk of deterioration and warrant prophylactic temporary pacing
Bundle branch blocks requiring support — bifascicular or trifascicular blocks in the setting of acute MI or symptoms

2nd-degree Mobitz type I (Wenckebach) — progressive PR prolongation until a beat is dropped — is usually benign, does not require pacing unless symptomatic, and is the NCLEX contrast to type II.

Type	Route	Setting	Indications	Key nursing consideration
Transcutaneous (external)	Large adhesive pads on chest and back (anterior-posterior); electrical current travels through the chest wall to the myocardium	Emergency; bedside in any unit with defibrillator/pacer capable of transcutaneous pacing	Emergent hemodynamically unstable bradycardia; bridge until transvenous pacing placed; pulseless electrical activity with suspected bradycardia	Painful — requires sedation and analgesia (morphine/fentanyl + midazolam); confirm mechanical capture by palpating pulse (carotid or femoral), not by watching monitor artifact; rotate pad site q2–4h to prevent skin burns; this is a temporary bridge only
Transvenous	Pacing lead (wire) inserted via central vein (subclavian, internal jugular, femoral) and floated into the right ventricle under fluoroscopy or ECG guidance	ICU or cardiac procedure room; bedside procedure	Symptomatic bradycardia requiring more stable temporary pacing than transcutaneous; post-MI conduction block; bridge to permanent pacemaker insertion	Restrict movement of insertion-side arm and shoulder; daily CXR to confirm lead position; assess insertion site for bleeding/infection; keep external generator secured; apply tension-relieving dressing to lead; monitor for lead displacement (loss of capture)
Permanent pacemaker (PPM)	Surgically implanted generator in a subcutaneous pocket (infraclavicular, usually left side) connected to transvenous leads in the right atrium and/or right ventricle	Electrophysiology lab or OR; outpatient or short-stay procedure	Chronic symptomatic bradycardia, sick sinus syndrome, persistent complete heart block, 2nd-degree type II, syncope due to conduction disease	Post-implant: no arm elevation above shoulder on implant side × 4–6 weeks; assess pocket site for hematoma/erosion/infection; discharge with device ID card; schedule device interrogation at 2 weeks and 6 weeks post-implant
CRT (cardiac resynchronization therapy)	Biventricular pacemaker — three leads (right atrium, right ventricle, left ventricle via coronary sinus); resynchronizes ventricular contraction	Electrophysiology lab	Heart failure with reduced ejection fraction (HFrEF, EF ≤35%) + left bundle branch block (QRS ≥150 ms) + NYHA class II–IV symptoms despite optimal medical therapy	Monitor for improvement in exercise tolerance and symptoms; educate patient that CRT response may take weeks to months; same post-implant restrictions as PPM
ICD (implantable cardioverter-defibrillator)	Implanted like a PPM with leads to the right ventricle; also delivers high-energy shocks for ventricular tachycardia/fibrillation	Electrophysiology lab	Survivors of sudden cardiac arrest; sustained VT/VF; EF ≤35% with increased risk of sudden cardiac death; selected channelopathies (long QT, Brugada syndrome)	Educate re: ICD shock experience; safe for family contact during shock; post-implant arm restriction same as PPM; avoid strong EMI; ICD may also pace for bradycardia (combination device)

Transcutaneous pacing: nursing priorities

Transcutaneous pacing is the most acute pacing scenario you will encounter, and it requires rapid, precise nursing action.

Setup and titration:

Apply anterior-posterior pads — anterior pad left of sternum at V3–V4 position; posterior pad below left scapula. Ensure good skin contact; dry skin if diaphoretic.
Set the rate — typically 60–80 bpm for an adult in symptomatic bradycardia.
Set the milliamps (mA) — start at the manufacturer-recommended minimum (usually 0 or 10 mA) and increase in 5–10 mA increments until electrical capture is achieved.
Electrical capture appears as a wide, broad pacemaker-induced QRS complex (LBBB-like morphology for anterior-posterior pad placement stimulating the right ventricle) following each pacemaker spike on the monitor.
Mechanical capture is confirmed by palpating a pulse that corresponds to the paced rate. The femoral or carotid artery is preferred because muscle artifact from the pacing current can make radial palpation unreliable. Pulse oximetry plethysmography waveform is also useful.
Secure capture threshold is usually 10–20 mA above the initial capture threshold — use this as the working output.
Administer analgesics and sedation promptly. Transcutaneous pacing causes significant chest wall muscle contractions, which are painful. Standard approach: IV fentanyl or morphine for analgesia plus midazolam or lorazepam for anxiolysis/sedation. Titrate to patient comfort while monitoring hemodynamics and respiratory status.

Key distinctions:

Transcutaneous pacing should be replaced by transvenous pacing as soon as the patient is stabilized — it is not safe or comfortable for sustained use.
The large current artifact on the ECG makes rhythm interpretation difficult. Evaluate the patient clinically, not just the monitor.

The NBG pacemaker code

The North American Society of Pacing and Electrophysiology (NASPE) / British Pacing and Electrophysiology Group (BPEG) — now called the Heart Rhythm Society — developed the generic (NBG) pacemaker code to describe pacemaker function in a standardized three-letter format. This is heavily tested on NCLEX.

Position	I — Chamber paced	II — Chamber sensed	III — Response to sensing
Letters used	V = Ventricle A = Atrium D = Dual (both A and V) O = None	V = Ventricle A = Atrium D = Dual (both A and V) O = None (asynchronous)	I = Inhibit (pacemaker inhibited by sensed intrinsic beat) T = Trigger (pacemaker triggers a pulse upon sensing) D = Dual (both I and T responses) O = None (asynchronous)
VVI	Ventricle paced	Ventricle sensed	Inhibit — paces only when ventricular rate falls below set rate; inhibited by intrinsic ventricular activity. Single-lead system. Used in atrial fibrillation or when atrial lead is not functioning.
DDD	Dual — paces both atria and ventricle as needed	Dual — senses both atria and ventricle	Dual — inhibited by intrinsic activity in the sensed chamber; can also trigger a ventricular pace in response to a sensed atrial beat. Most physiologic mode — maintains AV synchrony. Standard mode for sick sinus syndrome with intact AV conduction and for most PPM patients in normal sinus rhythm.
DOO	Dual — paces both atria and ventricle at fixed rate	None — sensing is off	None — asynchronous. Fires at set rate regardless of intrinsic cardiac activity. Used during surgery (to prevent inhibition by electrocautery EMI) or when a magnet is placed over the device.
AAI	Atrium paced	Atrium sensed	Inhibit — paces atrium only when intrinsic atrial rate falls below set rate. Used in sick sinus syndrome with intact AV conduction and no ventricular conduction abnormality.
VOO	Ventricle paced	None — sensing is off	None — asynchronous fixed-rate ventricular pacing regardless of intrinsic activity. Used in pacemaker-dependent patients undergoing surgery; magnet placement converts VVI to VOO.

Rate-responsive pacing (R suffix):

A fourth position letter R (e.g., DDDR, VVIR) indicates rate-responsive pacing. The device contains a motion or activity sensor (accelerometer or minute-ventilation sensor) that increases the pacing rate in response to physical activity. This is important for patients with chronotropic incompetence — the inability to appropriately increase heart rate with exercise. Without rate responsiveness, a patient’s heart rate stays fixed at the programmed lower rate even during exertion.

Demand vs asynchronous pacing:

Demand pacing (VVI, DDD, AAI): the device senses intrinsic activity. If the patient’s own rate is above the programmed rate, the pacemaker is inhibited and does not fire. It only paces when needed. This is the normal operating mode.
Asynchronous pacing (VOO, DOO, AOO): sensing is turned off. The pacemaker fires at a fixed rate regardless of what the heart is doing. This creates a risk of a pacemaker spike landing on a T wave (R-on-T phenomenon) if the patient has an underlying rhythm, but is sometimes necessary when sensing would cause inappropriate inhibition (e.g., strong electromagnetic interference during surgery).

Pacemaker malfunction

Pacemaker malfunction is the highest-yield NCLEX topic within pacemaker nursing. Each malfunction type has a specific ECG pattern, a specific mechanism, and a specific nursing intervention. Confusing them is a common error — learn each one as a distinct entity.

Malfunction type	ECG finding	Cause	Nursing action
Failure to capture	Pacemaker spikes are present and visible on the ECG, but each spike is NOT followed by a P wave (if atrial pacing) or a QRS complex (if ventricular pacing). The spike fires but the myocardium does not depolarize. Patient becomes symptomatic: hypotension, bradycardia, syncope, altered mental status.	Lead displacement or dislodgement (most common early cause); elevated pacing threshold (myocardium requires more energy than current output provides); battery depletion (late cause); electrolyte imbalance — hyperkalemia raises the threshold significantly; fibrosis at the lead tip (late cause); myocardial infarction at the pacing site	Increase pacing output (mA) — the threshold has risen. For transvenous pacemaker: notify provider immediately; daily CXR to check lead position; check electrolytes and correct hyperkalemia. For permanent device: device interrogation by electrophysiology. Prepare atropine and transcutaneous pacer as backup if patient symptomatic.
Failure to sense (undersensing)	The pacemaker fires despite an adequate intrinsic rhythm — it does not "see" the patient's own beats. Pacemaker spikes appear in inappropriate places: on top of or just after a native P wave or QRS complex. Critically, a spike can land on the T wave of the preceding beat (R-on-T phenomenon), which can trigger ventricular fibrillation.	Sensitivity set too low (sensing threshold too high in mV, meaning small intrinsic signals are below the threshold); lead displacement; lead fracture; battery depletion; fibrosis reducing signal amplitude at the lead tip; improper lead positioning	Increase sensitivity — decrease the sensing threshold in millivolts (a lower mV setting means the device detects smaller signals). For transvenous pacemaker: notify provider; check lead position on CXR; check sensing parameters on generator. Monitor continuously for R-on-T and VF. Have defibrillator immediately available.
Oversensing	The pacemaker senses signals it should not — muscle artifact, T waves, far-field sensing of the other chamber, or external electromagnetic interference (EMI) — and interprets these as intrinsic cardiac events. The device is inappropriately inhibited and fails to pace when the patient needs it. In a pacemaker-dependent patient, this causes symptomatic bradycardia or asystole on the monitor (though the patient's intrinsic rhythm may occasionally break through).	Sensitivity set too high (sensing threshold too low in mV — the device is too "sensitive" and picks up non-cardiac signals); electromagnetic interference (EMI) from electrocautery, MRI, arc welders, strong magnets; T-wave oversensing (the device mistakes the T wave for a second ventricular event); skeletal muscle noise (myopotential oversensing) — more common with unipolar pacemaker leads	Decrease sensitivity — increase the sensing threshold in millivolts (a higher mV setting means the device ignores smaller, non-cardiac signals). Identify and remove the EMI source. For surgical settings, switch to asynchronous mode (VOO/DOO) to prevent electrocautery interference. Device interrogation for permanent pacemaker programming adjustment.
Failure to pace (no output)	No pacemaker spikes visible on the ECG, even at slow rates where pacing should be occurring. The underlying rhythm — often a slow bradycardia or junctional escape — is visible without any pacemaker activity.	Battery depletion (most common for chronic devices at end of battery life); lead fracture (broken wire inside the insulating sheath); loose or disconnected connection at the generator (for external transvenous devices, a loose lead-to-generator connection is a common bedside cause); generator failure; oversensing suppressing all output (see above)	For transvenous external pacemaker: check all connections between the lead and the external generator; ensure lead terminals are securely inserted and the set screw is tightened; check battery level and replace the external generator if depleted. For permanent device: urgent device interrogation; place magnet over device to convert to asynchronous mode and confirm output. Provide backup transcutaneous pacing immediately if patient is symptomatic.

R-on-T phenomenon:

R-on-T occurs when a pacemaker spike (or any ventricular depolarization) falls on the T wave of the preceding beat — specifically during the relative refractory period of the cardiac cycle. During this window, the myocardium has partially repolarized but is vulnerable to re-excitation. A stimulus during this period can trigger chaotic, re-entrant depolarizations that degenerate into ventricular fibrillation.

In pacemaker nursing, R-on-T is a consequence of undersensing: the pacemaker does not detect the intrinsic QRS, fires prematurely, and the spike lands on the T wave. This is why undersensing in a pacemaker-dependent or paced patient is a potentially lethal malfunction requiring immediate intervention.

Nursing monitoring of paced rhythms

What a paced rhythm looks like on ECG:

A normally functioning ventricular pacemaker produces a characteristic pattern. For a right ventricle–paced rhythm (the most common configuration):

A vertical pacemaker spike precedes the QRS complex
The QRS is wide and bizarre — typically 120 ms or wider
The QRS morphology resembles left bundle branch block (LBBB): the impulse originates in the right ventricle and travels slowly through the myocardium without the benefit of the normal His-Purkinje system
The T wave deflects opposite to the QRS (discordant T waves — this is normal for a paced rhythm, not a sign of ischemia)
For DDD pacing in sinus rhythm: both an atrial spike (before the P wave) and a ventricular spike (before the QRS) may be visible

This is important context when interpreting a 12-lead ECG: ST changes and T-wave abnormalities cannot be interpreted the same way in a fully paced rhythm as in a normal sinus rhythm. Sgarbossa criteria provide a method for identifying MI in LBBB and paced rhythms, though this is beyond basic NCLEX scope.

Bedside monitoring priorities:

For all pacemaker patients, the bedside nurse maintains continuous monitoring with these focal assessments:

Rate verification: Compare the actual patient pulse or monitored ventricular rate to the pacemaker’s programmed lower rate. A rate consistently below the programmed rate indicates malfunction until proven otherwise.
Capture confirmation: Every pacemaker spike should be followed by the expected chamber depolarization. Spikes without complexes require immediate action.
Sensing confirmation: In demand mode, when the patient has adequate intrinsic beats above the programmed rate, the pacemaker should be inhibited and no spikes should appear. Spikes firing competitively against an adequate intrinsic rhythm indicate undersensing.
Hemodynamic correlation: A correctly paced rhythm should produce a palpable pulse and adequate blood pressure. A patient with pacemaker spikes and QRS complexes on the monitor but no pulse has capture on ECG without mechanical contraction — treat as pulseless electrical activity. See the rapid response and code blue nursing guide for the resuscitation approach.

Detailed guidance on reading cardiac arrhythmias and ECG rhythm interpretation provides essential background for interpreting the rhythms pacemakers are placed to treat.

Transvenous pacemaker: specific nursing management:

Immobilize the insertion-site arm — restrict shoulder abduction on the affected side to prevent lead displacement, especially in the first 24–48 hours
Daily CXR to confirm lead position in the right ventricular apex; sudden loss of capture after a coughing episode or repositioning suggests lead displacement
Inspect insertion site every shift for hematoma, erythema, warmth, or exudate
Secure the external generator — label it clearly (“DO NOT DISCONNECT”), and ensure there is always adequate battery in the generator
Document pacemaker settings (rate, mA output, sensitivity in mV) at every assessment; settings can accidentally change when the generator is moved
Protect the transvenous lead and generator from getting wet

Transcutaneous pacemaker: specific nursing management:

Assess skin under pads at least every 2–4 hours; rotate pad placement position if prolonged use is required to prevent skin injury from repeated current delivery through the same skin area
Titrate analgesia and sedation continuously — patients often require higher doses than initially anticipated as the procedure duration extends
Verify that electrical capture is still occurring after any patient movement — pad contact can shift

Post-implant care: permanent pacemaker and ICD

The period immediately following permanent device implantation is a critical nursing window. The generator has been placed in a subcutaneous pocket, and the leads have been secured but not yet fibrosed into position.

Immediate post-procedure assessment:

Assess the pocket site (infraclavicular, most commonly left side) for hematoma, bleeding through the dressing, or ecchymosis tracking down the arm. A rapidly expanding pocket hematoma requires immediate provider notification.
Vital signs and continuous ECG monitoring for at least 4–6 hours post-procedure
CXR within 1 hour of procedure to confirm lead position and rule out pneumothorax — the subclavian and internal jugular approaches for lead placement carry a small risk of pneumothorax
Pain assessment — mild to moderate discomfort at the pocket site is expected; sharp or pleuritic chest pain suggests pneumothorax

Movement restriction:

For the first 4–6 weeks post-implant, restrict the arm on the implanted side:

No raising the arm above shoulder height on the implanted side
No reaching across the body
No heavy lifting (nothing over 5–10 lb) on the implanted side
No vigorous pushing or pulling movements

These restrictions allow lead tips to fibrosis into the myocardium, securing the leads in position. Early lead displacement (in the first weeks) is the most common mechanical complication of permanent pacemaker implantation.

Pocket site complications to monitor:

Hematoma: Swelling and bruising under the skin overlying the generator. Most resolve spontaneously; anticoagulated patients carry a higher risk of significant hematoma.
Wound infection / pocket infection: Erythema, warmth, induration, purulent drainage, or fever. Device infections are serious — they can involve the leads and require device explantation in addition to antibiotic therapy.
Pocket erosion: Generator or lead eroding through the skin surface. Late complication associated with thin subcutaneous tissue, prior infection, or radiation to the area. Requires surgical revision.
Lead perforation: Rare; presents as chest pain, diaphragmatic pacing (hiccups), or tamponade signs.

Patient education: permanent pacemaker and ICD

Patient education after permanent pacemaker or ICD implantation is both a NCLEX-tested priority and a nursing responsibility that directly affects safety. Use teach-back to verify comprehension before discharge.

Topic	Permanent pacemaker (PPM)	ICD (additional or different considerations)
Device ID card	Carry the device ID card in wallet at all times. It lists device model, serial number, manufacturer, implant date, and programmed parameters. Show it before any medical procedure, imaging, or airport security screening.	Same — carry ICD card. ICD patients are especially important to identify before any procedure that could trigger a shock or require deactivation.
Pulse monitoring	Check pulse for 1 full minute once daily in the morning. Report to provider if rate is consistently below the programmed pacemaker rate, irregular, or racing.	Same. ICD patients: also report any episode of palpitations, dizziness, or syncope — these may indicate a treated or untreated arrhythmia episode.
Activity and lifting	Restrict arm movement on implanted side × 4–6 weeks. After healing, return to normal activity including exercise — confirm specifics with cardiologist/electrophysiologist.	ICD patients often have underlying cardiomyopathy with additional activity restrictions beyond just the post-implant period. Follow the cardiologist's guidance on exercise limits.
Electromagnetic interference (EMI)	Avoid prolonged close contact with strong EMI sources: arc welders, industrial motors, strong magnets (including MRI magnets), metal detectors (brief pass-through is safe — do not stand in the portal or let the wand linger over the device).	Same. ICD patients: store large-speaker devices and magnets at least 6 inches from the generator. Keep smartphones at least 6 inches away from the device (modern devices generally tolerate normal smartphone use at conversational distance).
Cell phone safety	Modern smartphones are safe but hold phone on the ear opposite the generator side as a routine precaution. Keep the phone at least 6 inches from the pacemaker pocket (normal front-pocket carry is sufficient distance for most devices).	Same precautions. Wireless charging pads: avoid placing the device directly over a wireless charger.
MRI safety	Most modern devices are MRI-conditional — they can be used with MRI scanners of specific field strengths and with specific protocol adjustments. This is NOT the same as MRI-safe. Always notify the ordering provider, radiology, and electrophysiology before any MRI. The device must be interrogated before and after the scan.	Same — ICD patients must notify all providers. Older non-MRI-conditional ICDs may be an absolute contraindication to MRI. Never assume.
Airport security	Inform TSA that a pacemaker is present before entering the security line. Metal detectors are safe for brief passage — do not remain stationary in the portal. The device ID card helps. If a hand wand is used, ask that it not be held stationary over the generator.	Same. TSA officers are familiar with implanted devices; present the card and request alternate screening if preferred.
ICD shock experience	Not applicable for pacemaker-only device (PPMs do not deliver shocks).	An ICD shock is unexpected and uncomfortable — described as a forceful "kick" or "thump" in the chest. If shocked: lie or sit down, call 911 if confused or if shocks repeat within a short period. Family members and bystanders are safe to touch the patient when the ICD fires — the externally felt current is minimal and not dangerous.
Follow-up	Device clinic visit at 2 weeks and 6 weeks post-implant for wound check and device interrogation. Ongoing remote monitoring transmits device data to the clinic automatically; the clinic will call if any alerts are generated. Battery life: 5–15 years depending on device model, pacing percentage, and output settings.	ICD follow-up is the same schedule, but device interrogation also reviews any therapy delivered (shocks, anti-tachycardia pacing). Patients should report all shock episodes for review.

Key teaching points for ICD-specific scenarios:

After a single ICD shock with no symptoms and rapid recovery, the patient can call their electrophysiologist’s on-call line within a few hours for device interrogation. After multiple shocks in rapid succession (ICD storm), or after a shock with persistent symptoms (chest pain, shortness of breath, confusion, hemodynamic instability), the patient calls 911 immediately.

Patients and families are often frightened of the ICD shock. Normalize the experience: the ICD delivered therapy because it detected a life-threatening rhythm — the device did exactly what it was supposed to do.

Post-MI AV block and pacemaker decisions

Acute myocardial infarction can damage the conduction system and produce new AV blocks or bundle branch blocks that require temporary or permanent pacing. Understanding the distinction between inferior and anterior MI conduction complications is NCLEX-tested content:

Inferior MI (right coronary artery territory): May cause transient 1st- or 2nd-degree AV block (Wenckebach). The AV node is usually supplied by the RCA. These blocks are typically transient and often do not require pacing; atropine may be sufficient.
Anterior MI (left anterior descending territory): May cause new right bundle branch block (RBBB), left bundle branch block (LBBB), or bifascicular/trifascicular blocks. These reflect extensive septal and conduction system necrosis. New complete heart block or high-degree AV block after anterior MI is a class I indication for temporary transvenous pacing.

For a concise mnemonic covering all four AV block types and their management priorities, see the heart block poem.

CRT (cardiac resynchronization therapy) is relevant for patients who develop heart failure with reduced ejection fraction — particularly those with LBBB on ECG and EF ≤35% despite optimal medical therapy. CRT improves symptoms, reduces hospitalizations, and prolongs survival in appropriately selected patients by resynchronizing the interventricular contraction timing.

NCLEX tips

Failure to capture = pacemaker spike present, no QRS follows → increase mA output. Myocardium is not responding to the stimulus. Causes include lead displacement, hyperkalemia, battery depletion.
Undersensing (failure to sense) = pacemaker fires despite adequate intrinsic rhythm → spikes appear competitively, including on T waves. Risk of R-on-T triggering VF. Fix: increase sensitivity (decrease the mV threshold).
Oversensing = pacemaker inhibited by non-cardiac signals → pacemaker-dependent patient develops symptomatic bradycardia. Common cause: EMI or muscle artifact. Fix: decrease sensitivity (increase the mV threshold).
Failure to pace (no output) = no pacemaker spikes visible. Causes: battery failure, lead fracture, loose connection. First action for transvenous pacemaker: check all connections between lead and generator.
R-on-T is caused by undersensing — the pacemaker does not see the intrinsic QRS and fires prematurely. The spike lands on the T wave during the relative refractory period and can trigger VF. This is the life-threatening consequence of untreated undersensing.
Mechanical capture — not electrical capture — confirms the pacemaker is working. Feel for a pulse at the carotid or femoral artery. Monitor artifact from transcutaneous pacing mimics QRS complexes and can fool the eye. A pulse oximetry waveform is also acceptable confirmation.
Transcutaneous pacing is painful — sedation and analgesia are not optional. Standard approach: IV opioid for pain plus benzodiazepine for anxiety/sedation.
Paced QRS morphology: Right ventricle–paced rhythms produce wide, LBBB-like QRS complexes with discordant T waves. Wide bizarre QRS in a pacemaker patient is normal and does not indicate ischemia.
NBG code memory cue: Position I = paced, Position II = sensed, Position III = response. DDD is most physiologic (dual chamber, AV synchrony maintained). VVI is single-lead ventricular pacing (used in AF). DOO is asynchronous fixed-rate (used during surgery/EMI).
MRI-conditional ≠ MRI-safe. Always verify device compatibility and notify electrophysiology before any MRI. Patients carrying older devices may have non-MRI-conditional hardware.
Post-implant movement restriction: No raising the arm on the implanted side above shoulder level for 4–6 weeks. This is the most commonly tested post-procedure discharge instruction for permanent pacemaker.
ICD shock: Family members are safe to touch the patient when the ICD fires. A single shock with rapid recovery = call the clinic. Repeated shocks or hemodynamic instability = call 911.
Sensitive vs threshold: When nurses say “increase sensitivity,” they mean decrease the mV threshold number — the device will then sense smaller signals. Counterintuitive but consistent: higher sensitivity → lower mV threshold.
Sick sinus syndrome produces unpredictable bradycardia, sinus arrest, and tachy-brady alternation. It is one of the most common permanent pacemaker indications and is worth associating with the atrial fibrillation connection — see atrial fibrillation nursing for the rate-control context.
2nd-degree Mobitz type II = pacing indication even if asymptomatic. It carries a high risk of sudden deterioration to complete heart block. Contrast with Mobitz type I (Wenckebach), which is usually benign and does not require pacing unless the patient is symptomatic.
Hyperkalemia raises the pacing threshold — more mA is needed to achieve capture. In a patient with failure to capture and a known renal history, check the potassium level before escalating pacing output.
CRT indication: HFrEF + EF ≤35% + LBBB + QRS ≥150 ms + NYHA class II–IV on optimal medical therapy. Biventricular device resynchronizes ventricular contraction.
Temporary transvenous pacemaker lead displacement most often presents as sudden loss of capture after patient movement or coughing. Confirm with CXR. Keep patient still; notify provider.

Pacemaker nursing connects directly to several core cardiac competencies. The cardiac arrhythmias nursing guide covers the bradycardias and conduction blocks that drive pacing decisions. The ECG interpretation cheat sheet provides the rhythm analysis skills needed to recognize pacemaker spikes, paced QRS complexes, and malfunction patterns. The 12-lead ECG nursing guide is the foundation for identifying bundle branch blocks and post-MI conduction disease.

For emergent transcutaneous pacing in the resuscitation setting, the rapid response and code blue nursing guide covers the full resuscitation algorithm in which transcutaneous pacing plays a supporting role.

The MI and ACS nursing guide covers the post-MI conduction complications — inferior vs anterior territory blocks — that often drive temporary pacing decisions in the CCU. Patients who ultimately receive CRT devices often have advanced heart failure as the underlying driver.