Cardiac Tamponade: The Daily PANCE Blueprint
A 58-year-old man with metastatic lung cancer comes in with three days of worsening shortness of breath. He is alert but uncomfortable. His blood pressure is 86/60, heart rate 122, and oxygen saturation 94% on room air. His neck veins are distended, his heart sounds are muffled, and his systolic pressure drops 14 mm Hg on inspiration. The ECG shows low voltage with beat-to-beat variation in QRS amplitude. Which of the following is the most appropriate next step in management?
A. Give high-dose IV furosemide
B. Urgent pericardiocentesis
C. Give IV metoprolol
D. Emergent thoracotomy
E. CT angiography of the chest
Answer and topic summary
The answer is B. Urgent pericardiocentesis
Hypotension, distended neck veins, and muffled heart sounds — Beck triad — with pulsus paradoxus and electrical alternans is cardiac tamponade, fluid accumulating in the pericardial sac faster than it can stretch, squeezing the heart until the ventricles cannot fill. The definitive move is urgent pericardiocentesis to drain the fluid and restore filling. The trap here is treating it like heart failure: diuretics and beta-blockers are actively harmful, because this patient depends on preload and on a fast heart rate to maintain cardiac output — dropping either can precipitate arrest. Thoracotomy is reserved for traumatic tamponade or when pericardiocentesis fails, and imaging should never delay drainage in an unstable patient. Bedside echocardiography confirms it in seconds by showing diastolic collapse of the right atrium and ventricle.
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Covered under ⇒ PANCE Blueprint Cardiology ⇒ ⇒
