Electric alternans is seen in
Rrf Harrison 19 th ed pg 1573 There may be reduction in ampli- tude of the QRS complexes, and electrical alternans of the P, QRS, or T waves should raise the suspicion of cardiac tamponade . the features that distinguish acute cardiac tampon- ade from constrictive pericarditis.
Cardiac tamponade
Restrictive cardiomyopathy
Constrictive pericarditis
Right ventricular infract
C.V.S