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Electrical Alternans: More Than Just a Pericardial Effusion
Jun 08, 2025
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Electrical alternans is a fascinating ECG phenomenon typically associated with large pericardial effusionā€”but it is not pathognomonic for it. This beat-to-beat variation in the amplitude or axis of the QRS complex (and sometimes P or T waves) can also be seen in supraventricular tachyarrhythmias, es...