Pericarditis nursing: assessment, interventions, and NCLEX review

Pericarditis is inflammation of the pericardium — the two-layered fibroserous sac surrounding the heart — and it is among the highest-yield cardiovascular topics on NCLEX. The condition matters clinically because it can progress from a self-limited viral illness to a hemodynamic emergency: when inflammatory fluid accumulates faster than the pericardium can stretch, cardiac tamponade develops and cardiac output collapses. For nursing students, the key concepts tested are the pathognomonic friction rub, the EKG pattern that mimics but differs from STEMI, the escalation from effusion to tamponade, Beck’s triad, and the nursing priorities at each stage. Viral infection accounts for up to 90% of acute cases in developed countries, and with prompt NSAID therapy most patients recover fully. This reference walks through every stage — from pericardial anatomy through constrictive pericarditis — with NCLEX-ready clinical precision.

Cross-reference this page with the infective endocarditis nursing reference for cardiac infection comparison, and the heart failure nursing reference for the downstream consequences of chronic pericardial disease on cardiac function.

Pericardial anatomy and the inflammation cascade

The pericardium has two layers: the fibrous outer pericardium (tough collagen) and the serous pericardium (further divided into the parietal layer lining the fibrous sac and the visceral layer adhering to the epicardium, also called the epicardium itself). Between the two serous layers sits the pericardial cavity, which normally contains 15–50 mL of serous fluid that lubricates the heart during each beat.

When inflammation is triggered — by viral infection, autoimmune activation, uremia, or trauma — the pericardial layers become edematous and roughened. This roughening produces the hallmark friction rub: a superficial, high-pitched scratchy sound caused by inflamed pericardial surfaces rubbing together with each heartbeat and respiratory cycle. It has up to three components corresponding to atrial systole, ventricular systole, and early ventricular filling, and it is evanescent — it may disappear as effusion develops (fluid separates the layers).

As inflammation persists, vascular permeability increases and exudate accumulates in the pericardial cavity. The fibrous pericardium is relatively inelastic: it can accommodate slow accumulation of several hundred milliliters, but rapid accumulation of even 100–200 mL can generate enough intrapericardial pressure to compress the cardiac chambers. This compression — cardiac tamponade — reduces ventricular filling, drops cardiac output, and, if untreated, causes obstructive shock and death.

Types of pericarditis

Assessment

Clinical presentation

Patients with acute pericarditis typically present with three to four defining features:

Chest pain is the dominant complaint in 85–90% of patients. The character is sharp, pleuritic — meaning it worsens with deep inspiration, coughing, and lying flat. Critically, pain improves when the patient leans forward (sitting up and leaning over the knees or a bedside table). This postural variation reflects reduced friction between the inflamed pericardial surfaces when the heart falls forward away from the posterior pericardium. On NCLEX and in clinical practice, this positional pattern is a key differentiator from MI, in which pain does not change with position.

Fever and malaise are common, reflecting the inflammatory etiology. Low-grade fever (38–39°C) is typical of viral pericarditis; high fever suggests bacterial or purulent pericarditis requiring urgent escalation.

Dyspnea occurs in a significant minority of patients, either from pain-limited breathing or from early effusion reducing cardiac compliance.

Pericardial friction rub is the pathognomonic physical finding. Auscultation technique is critical:

• Position: patient leaning forward, seated upright
• Timing: listen at end-expiration (lung tissue moves away, reducing background noise)
• Location: left lower sternal border (3rd–4th intercostal space)
• Character: high-pitched, scratchy or grating — sometimes described as walking on fresh snow or leather rubbing against leather
• Phases: classically triphasic (atrial systole, ventricular systole, early diastole filling), though the systolic component alone is most reliably heard
• The rub is evanescent: it may be present one hour and absent the next as effusion develops (fluid cushions the surfaces). Absence of a rub does not exclude pericarditis.

EKG changes in pericarditis

EKG interpretation is one of the highest-yield NCLEX assessment areas for pericarditis. Four stages have been classically described:

• Stage 1 (days 0–2): Diffuse, saddle-shaped (concave up) ST elevation in nearly all leads except aVR and V1 (which show reciprocal ST depression). PR depression — depression of the PR segment below the baseline — is the earliest and most specific EKG sign of pericarditis; it reflects atrial epicardial inflammation. Sinus tachycardia is common.
• Stage 2 (days 2–7): ST segments normalize; T waves flatten.
• Stage 3 (days 7–14): Diffuse T-wave inversions — this can be confused with NSTEMI.
• Stage 4 (weeks–months): EKG normalizes, or T-wave inversions persist in chronic/constrictive disease.

Electrical alternans — alternating QRS height beat-to-beat — indicates a large pericardial effusion causing the heart to swing within the fluid-filled sac. Electrical alternans is a pre-tamponade warning sign and demands immediate echocardiographic assessment.

Differentiating pericarditis EKG from STEMI: In STEMI, ST elevation is regional (localizes to a vascular territory with reciprocal depression in opposing leads). In pericarditis, ST elevation is diffuse (multiple lead groups simultaneously), concave up (saddle-shaped), and accompanied by PR depression. STEMI has convex (tombstone) ST elevation and no PR depression.

Diagnostic workup

• Labs: ESR and CRP elevated (CRP used to guide return-to-activity); troponin may be mildly elevated if myopericarditis (concurrent myocardial involvement — warrants closer monitoring for arrhythmia); CBC, BMP, ANA/anti-dsDNA if autoimmune suspected; blood cultures if bacterial suspected; BUN/creatinine for uremic workup
• Echocardiogram: Confirms pericardial effusion, assesses size and hemodynamic significance, guides pericardiocentesis; bedside point-of-care ultrasound (POCUS) increasingly used for rapid evaluation
• Chest X-ray: May show cardiomegaly (“water-bottle heart” silhouette) if large effusion; normal in early or small effusions
• Cardiac MRI: Used when diagnosis is uncertain or myopericarditis is suspected; shows pericardial enhancement and edema

Pericardial effusion and progression

Pericardial effusion — fluid accumulation in the pericardial cavity — is a direct complication of sustained inflammation. The hemodynamic significance depends not on the volume alone but on the rate of accumulation and the compliance of the pericardium:

• A slowly accumulating effusion (e.g., malignant, hypothyroid, or chronic TB) can grow to 1–2 liters before causing significant hemodynamic compromise, because the fibrous pericardium slowly stretches.
• A rapidly accumulating effusion (e.g., trauma, aortic dissection into the pericardium, or purulent pericarditis) can cause tamponade physiology with as little as 100–200 mL because the pericardium has no time to adapt.

Echocardiographic grading:

• Small: <10 mm echo-free space posteriorly
• Moderate: 10–20 mm
• Large: >20 mm — at this size, associated with significant hemodynamic risk

Echocardiographic signs of hemodynamic compromise include right atrial collapse during systole and right ventricular diastolic collapse — the right-sided chambers (lower pressure) are compressed first. These findings indicate impending or actual tamponade and demand urgent intervention.

For nursing students: the key transition to recognize is when an effusion becomes hemodynamically significant. This is a clinical diagnosis supported by echo — the patient develops tachycardia, hypotension, and dyspnea as cardiac output begins to fall.

Cardiac tamponade

Cardiac tamponade is an obstructive form of shock caused by progressive compression of all four cardiac chambers by pericardial fluid. As intrapericardial pressure rises to equal or exceed right atrial filling pressure, ventricular filling falls, stroke volume drops, and — without intervention — cardiac output fails.

Beck’s triad

The classic clinical presentation is Beck’s triad:

1. Hypotension — reduced stroke volume and cardiac output
2. Muffled (distant) heart sounds — fluid attenuates sound transmission
3. Jugular venous distension (JVD) — elevated systemic venous pressure as the right heart cannot fill; venous blood backs up

Note the precise terminology: “muffled or distant heart sounds” — not simply “absent.” And “jugular venous distension” — not “distended neck veins,” which is imprecise for NCLEX purposes.

Pulsus paradoxus

Pulsus paradoxus is an exaggeration of the normal inspiratory drop in systolic blood pressure. Normally, inspiration drops SBP by <10 mmHg. In tamponade, the compressed pericardium forces the two ventricles into exaggerated competition for filling space (ventricular interdependence): when the right ventricle fills more on inspiration (due to increased venous return), it bulges into the left ventricular space (interventricular septum shifts left), reducing LV filling and SBP drops >10 mmHg.

How to measure: Use a standard sphygmomanometer. Inflate the cuff above systolic. Deflate slowly — note the pressure at which Korotkoff sounds are heard only during expiration. Continue deflating until sounds are heard throughout the respiratory cycle. The difference between these two readings is the pulsus paradoxus. A value >10 mmHg is abnormal; values >20–25 mmHg are strongly suggestive of tamponade.

Pulsus paradoxus also occurs in severe asthma, severe COPD exacerbation, and tension pneumothorax — it is not exclusive to tamponade.

Emergency pericardiocentesis

Tamponade is a medical emergency. Treatment is immediate drainage:

• Pericardiocentesis: Needle inserted at the xiphosternal angle (subxiphoid approach, directed toward the left shoulder at 45°). The procedure is performed under continuous ECG monitoring — contact with the myocardium produces ST changes or premature beats, signaling the needle is too deep.
• Ultrasound guidance is strongly preferred to reduce complications (cardiac laceration, pneumothorax).
• A pigtail catheter may be left in place for continued drainage if reaccumulation is expected.
• For purulent tamponade or TB tamponade, surgical drainage (pericardial window) is often required.
• After successful drainage, immediate hemodynamic improvement is expected: BP rises, JVD decreases, heart sounds return.

Tamponade vs. tension pneumothorax vs. constrictive pericarditis — nursing comparison

Medical management

NSAIDs — first-line therapy

NSAIDs are the foundation of acute pericarditis treatment, targeting both pain and inflammation:

• Aspirin: 750–1000 mg every 8 hours for 1–2 weeks, then tapered. Preferred when pericarditis occurs post-MI (ibuprofen impairs cyclooxygenase-dependent healing of MI scar tissue).
• Ibuprofen: 600 mg every 8 hours — effective and well-tolerated; avoid post-MI.
• Indomethacin: 25–50 mg three times daily — less preferred due to increased side effects.
• GI protection: All patients on NSAIDs should receive a proton pump inhibitor (PPI) to reduce GI toxicity.

Colchicine — adjunct to reduce recurrence

The 2015 ESC/AHA guidelines recommend adding colchicine to NSAIDs for the first episode of acute pericarditis. Colchicine reduces recurrence by approximately 50% and shortens symptom duration.

• Dose: 0.5 mg twice daily (patients >70 kg) or 0.5 mg once daily (patients ≤70 kg or with GI intolerance) for 3 months
• Contraindications: Severe renal impairment (eGFR <30), severe hepatic impairment, pregnancy
• Monitoring: Diarrhea is the most common side effect; if it occurs, reduce to once daily before stopping

Corticosteroids — not first-line

Corticosteroids are not the default treatment for acute pericarditis. Despite being anti-inflammatory, they increase the recurrence rate of pericarditis and are associated with worse long-term outcomes when used empirically. They are reserved for:

• Colchicine-refractory or NSAID-contraindicated cases
• Specific etiologies where they are indicated: connective tissue disease (SLE), uremic pericarditis, autoinflammatory syndromes (IL-1 pathway mutations)
• When used: prednisone 0.25–0.5 mg/kg/day, tapered slowly over weeks to months; never stop abruptly

Antibiotics and drainage

• Purulent pericarditis: Broad-spectrum IV antibiotics (anti-staphylococcal coverage essential); early surgical drainage via pericardial window is the standard of care; pericardiocentesis alone is insufficient.
• TB pericarditis: Full 6-month anti-tuberculosis regimen (RIPE — rifampin, isoniazid, pyrazinamide, ethambutol); adjunct corticosteroids reduce constrictive pericarditis risk; may require pericardiectomy.

Nursing interventions

Positioning

Position is among the most important nursing interventions. Encourage the patient to sit upright and lean forward — this reduces friction rub pain by relieving pressure on the inflamed pericardium. The forward-leaning position is so characteristic that nursing students must recognize it as both diagnostic (the patient spontaneously adopts it to relieve pain) and therapeutic. In the acute hospital setting, a bedside table with a pillow for the patient to lean over is a simple, effective comfort measure.

Avoid supine positioning during the acute phase — it worsens pleuritic pain and may increase pericardial pressure in the presence of effusion.

Pain management

• Administer prescribed NSAIDs on schedule (not PRN) to maintain therapeutic anti-inflammatory levels
• Ensure PPI co-administration and assess for GI adverse effects
• Reassess pain using a validated scale before and 30–60 minutes after administration
• Educate the patient that leaning forward and sitting up reduces pain — this is a non-pharmacological measure they control

Cardiac monitoring

Continuous cardiac monitoring is essential during the acute phase. The nurse must recognize:

• New tachycardia — may signal increasing effusion or early tamponade
• EKG changes: new electrical alternans demands immediate physician notification
• Signs of tamponade: rising heart rate, falling BP, increasing JVD, muffled heart sounds — this is the escalation triad requiring emergency response
• Assess lung sounds, peripheral perfusion, and urine output at least every 4 hours in the acute setting

Activity restriction

ESC guidelines specify activity restriction until all three of the following criteria are met:

1. Patient is asymptomatic (no fever, no pleuritic chest pain)
2. CRP has normalized
3. EKG changes have resolved

This is stricter than the lay understanding of “feeling better.” Athletes face the most stringent restrictions: return to competitive sport requires 3 months of restriction and complete resolution of all diagnostic criteria. Premature return to strenuous activity risks myocarditis extension and serious arrhythmia.

Patient education

• Explain the disease process, expected duration (most acute viral cases resolve in 2–6 weeks), and recurrence risk (~15–30%)
• Emphasize completing the full NSAID and colchicine course even when symptoms resolve — stopping early is the primary driver of recurrence
• Teach GI protective measures with NSAIDs: take with food, use prescribed PPI
• Instruct on warning signs requiring immediate return: worsening dyspnea, feeling of heart racing, dizziness, syncope — these may indicate effusion expansion or tamponade
• Explain activity restrictions: avoid vigorous exercise and contact sports until physician clears return

Constrictive pericarditis

Constrictive pericarditis develops when chronic pericardial inflammation leads to fibrous thickening, scarring, and eventual calcification of the pericardial sac. The result is a rigid, non-compliant shell around the heart that prevents normal diastolic filling — a restrictive physiology distinct from the effusive process in acute pericarditis.

Causes: TB (most common globally), cardiac surgery (post-pericardiotomy syndrome progressing to constriction), radiation, recurrent viral pericarditis, and connective tissue disease.

Pathophysiology: The rigid pericardium dissociates cardiac filling from intrathoracic pressure changes. Normally, inspiration drops intrathoracic pressure and increases venous return to the right heart. In constrictive pericarditis, the fixed pericardial shell means venous return cannot increase to fill the right heart — systemic venous pressure (JVD) rises on inspiration instead of falling. This is Kussmaul sign: jugular venous distension that increases with inspiration. It is the opposite of normal physiology.

Kussmaul sign also occurs in restrictive cardiomyopathy and severe right heart failure — but combined with a history of pericardial disease, it strongly suggests constrictive pericarditis.

Other features:

• Pericardial knock: a high-pitched early diastolic sound heard after S2, caused by abrupt cessation of ventricular filling when the rigid pericardium limits expansion
• Hepatomegaly, ascites, and peripheral edema from chronically elevated venous pressure (often misdiagnosed as cirrhosis or right heart failure)
• Low voltage on EKG; pericardial calcification visible on CXR or CT (best seen on CT)
• Equalization of diastolic pressures across all four chambers on cardiac catheterization — the diagnostic gold standard

Treatment: Pericardiectomy (surgical removal of the pericardium) is the definitive treatment for symptomatic constrictive pericarditis. It is a major operation with significant perioperative mortality (~5–10%); results are best when pericardium is not heavily calcified. Medical management (diuretics for volume overload) is palliative and does not reverse the constrictive physiology.

For comparison with restrictive cardiomyopathy — a key NCLEX differential — see the heart failure nursing reference for diastolic dysfunction physiology.

EKG: pericarditis vs. STEMI differentiation

A fourth table is warranted here because NCLEX frequently asks students to differentiate pericarditis EKG from STEMI — two presentations that can both cause chest pain and ST elevation, but require opposite management approaches.

Critical NCLEX teaching point: Giving thrombolytics or anticoagulation to a patient with pericarditis (mistaken for STEMI) can cause hemorrhagic pericardial effusion and life-threatening tamponade. EKG differentiation is not just an academic exercise — it is a patient safety imperative.

NCLEX tips

1. The classic positional pain pattern: Pericarditis chest pain is sharp and pleuritic, worse when lying flat (supine), and relieved by leaning forward. This is the single most tested clinical feature. If a patient is “sitting up leaning on the overbed table,” pericarditis is at the top of the differential.

2. Friction rub auscultation technique: Best heard at the left lower sternal border with the patient leaning forward and holding end-expiration. High-pitched, scratchy. It disappears when effusion develops — silence does not rule out pericarditis.

3. PR depression is the earliest EKG sign: Before diffuse ST elevation becomes prominent, PR depression — especially in lead II — is the most specific EKG finding for pericarditis. Know it, recognize it.

4. Diffuse saddle-shaped ST elevation, not STEMI: Pericarditis produces concave-up (saddle-shaped) ST elevation in nearly all leads except aVR and V1. STEMI produces convex (tombstone) elevation in a regional distribution. Treating pericarditis with thrombolytics is a dangerous error.

5. Dressler syndrome timing: Post-MI pericarditis that develops 2–10 weeks after myocardial infarction. Autoimmune mechanism. Aspirin is preferred over ibuprofen post-MI. Distinguish from early post-MI pericarditis (days 1–4), which is direct epicardial inflammation.

6. Beck’s triad for tamponade: Hypotension + muffled (distant) heart sounds + JVD. All three together = tamponade until proven otherwise. Emergency pericardiocentesis is the treatment — do not delay for additional imaging when the patient is hemodynamically unstable.

7. Pulsus paradoxus measurement: >10 mmHg drop in systolic BP during normal inspiration, measured by sphygmomanometer. Heard only in expiration first, then throughout respiratory cycle — the difference is the pulsus. Present in tamponade, severe asthma, and tension pneumothorax.

8. Electrical alternans = large effusion / pre-tamponade: Alternating QRS amplitude on EKG (the heart is swinging in fluid). This is a red-flag sign that precedes tamponade — escalate immediately.

9. Corticosteroids are NOT first-line: NSAIDs + colchicine is the guideline-recommended first-line regimen. Corticosteroids increase the rate of pericarditis recurrence and are reserved for specific indications (colchicine-refractory, connective tissue disease, uremic pericarditis). This distinction is a common NCLEX distractor.

10. Colchicine reduces recurrence by ~50%: Adding colchicine to NSAIDs for the first episode of pericarditis cuts recurrence nearly in half. Educate patients to complete the full 3-month course even after symptoms resolve. Contraindicated in severe renal/hepatic impairment.

11. Kussmaul sign — constrictive pericarditis: JVD increases with inspiration (the opposite of normal). The rigid pericardium prevents the right heart from filling on inspiration, so venous pressure rises. Contrast this with normal physiology, where inspiration decreases JVD by drawing more blood into the thorax.

12. Activity restriction is three-criteria, not symptom-only: Return to activity (per ESC) requires: (1) asymptomatic, (2) CRP normalized, AND (3) EKG changes resolved. Athletes require 3 months minimum before return to competitive sport. “I feel better” is not sufficient clearance.

13. Uremic pericarditis: Occurs with BUN >60 mg/dL in ESRD; may lack typical EKG changes; NSAIDs are ineffective; treatment is intensive hemodialysis. This complication is a key reason dialysis compliance matters — missed sessions can precipitate pericarditis.

14. Pericardiocentesis procedure — ECG monitoring is mandatory: The needle is inserted at the xiphosternal angle directed toward the left shoulder. Continuous ECG monitoring detects contact with the myocardium (ST changes, PVCs). Ultrasound guidance reduces complications. After drainage, expect immediate hemodynamic improvement.

15. Tension pneumothorax vs. tamponade — key differentiator: Both cause JVD, hypotension, and tachycardia. Tension pneumothorax produces absent breath sounds on the affected side and tracheal deviation away from the affected side. Tamponade produces muffled heart sounds with normal bilateral breath sounds. Tension pneumo is treated with immediate needle decompression, not pericardiocentesis.

Putting it together: nursing priorities by stage

Pericarditis presents across a spectrum, and nursing priorities shift with severity:

Acute uncomplicated pericarditis (no effusion or small effusion): Comfort-focused care — positioning, NSAID administration, cardiac monitoring, patient education, and outpatient follow-up planning. Most patients are managed outpatient with close follow-up; hospitalization is indicated for high-risk features (fever >38°C, subacute onset, immunocompromised state, large effusion, troponin elevation, or failure to respond to NSAIDs in 7 days).

Moderate-to-large effusion: Inpatient monitoring for hemodynamic deterioration; serial echocardiograms; continuous cardiac monitoring with attention to tachycardia, falling BP, and electrical alternans; preparation for possible pericardiocentesis.

Cardiac tamponade: Medical emergency. Activate rapid response or code team as indicated. Position supine with legs elevated to maximize preload and maintain cardiac output. Ensure large-bore IV access. Continuous hemodynamic monitoring. Support pericardiocentesis setup (procedure tray, ultrasound, ECG leads). Volume resuscitation as temporizing measure (increases filling pressure). Do NOT administer diuretics — this reduces preload and can precipitate cardiovascular collapse.

Purulent pericarditis or septic source: See the sepsis nursing reference for hemodynamic resuscitation priorities. Purulent pericarditis is a source of bacteremia requiring both source control (drainage) and systemic antibiotics.

Uremic pericarditis: Coordinate dialysis scheduling urgently. Monitor for hemorrhagic effusion (uremic toxins impair platelet function, increasing bleeding risk). See the AKI nursing reference for renal failure management context.

Arrhythmia monitoring: Pericarditis and myopericarditis can trigger atrial and ventricular arrhythmias. Review the atrial fibrillation nursing reference for rhythm recognition and management. Continuous telemetry monitoring is standard during the acute phase.

Lab value interpretation: ESR, CRP, CBC, and troponin are the key labs in pericarditis management. CRP is the most useful marker for guiding return-to-activity — it should normalize before resuming exercise. Cross-reference the nursing lab values cheat sheet for normal ranges and clinical significance. For EKG changes discussed throughout this article, see the EKG interpretation cheat sheet for systematic rhythm analysis technique.