How does cardiac tamponade present clinically and what is the emergency treatment?

1 Answer

Cardiac Tamponade - Clinical Presentation and Management: Classic Triad (Beck's Triad): 1. Hypotension 2. Raised JVP (elevated CVP) 3. Muffled/distant heart sounds Additional Features: - Pulsus paradoxus: fall in SBP >10 mmHg on inspiration (hallmark sign) - Tachycardia (compensatory) - Kussmaul's sign: JVP rises on inspiration (constrictive pericarditis - but can occur in tamponade) - ECG: Low voltage, electrical alternans (pathognomonic) - CXR: Globular cardiomegaly (if large effusion) - ECHO: Pericardial effusion + RV/RA diastolic collapse (earliest sign) + IVC plethora Immediate Management: 1. IV fluid bolus (250-500 mL saline) - buys time by increasing preload 2. Avoid: PEEP/mechanical ventilation (worsens hemodynamics), vasodilators, diuretics 3. Pericardiocentesis: Definitive treatment - Echo-guided preferred (safer) - Classic approach: Subxiphoid angle at 45° toward left shoulder - Drain fluid, send for culture, cytology, LDH, protein, glucose 4. Surgical drainage: If loculated, traumatic, post-cardiac surgery (prefer surgical drainage) Causes to consider: - Post-cardiac surgery (most likely in your case) - Malignancy, TB, uremia - Acute MI (free wall rupture) - Aortic dissection (type A) Key: Do not delay pericardiocentesis if hemodynamic compromise present.