When every other ECG complex has alternating amplitude (i.e., the one QRS complex is smaller when compared to the next), then the patient may have ____.

Question

Quizplus · Accepted Answer

Electrical alternans is characterized by alternating QRS amplitudes, typically seen in the setting of pericardial effusion or tamponade. LBBB and RBBB refer to specific conduction abnormalities and do not typically present with alternating QRS amplitudes. Reciprocal ST depression refers to ST segment changes on the ECG and is not related to QRS amplitude.

When Every Other ECG Complex Has Alternating Amplitude (I