Slide 1: What’s the dx? [EKG] 25M fell off his bike. Now with chest pain. HR 130. BP 90/60.

Slide 2: Throwback: low voltage! [EKG showing avg amplitude < 5mm in the limb leads AND avg amplitude < 10mm in the precordial leads] New: electrical alternans!

Slide 3: Among patients with pericardial effusion, the sensitivity/specificity for tamponade: Low voltage – sensitivity 56%, specificity 74%; electrical alternans – sensitivity 23%, specificity 98%; tachycardia – sensitivity 76%, specificity 60%. Next step?

Slide 4: Ultrasound! [Tamponade gif]

References


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