During an electrophysiological study in a patient with a concealed accessory connection, there was no evidence of eiectrical or mechanical alfernans during tachycardia until propranolol was adminislered, but both forms of alternans developed with tachycardia of a slower rate following propranolol. Echocardiographic. arterial pressure, and electrocardiographic data obtained prior to and following propranolol administration are presented.
|Original language||English (US)|
|Number of pages||5|
|Journal||Pacing and Clinical Electrophysiology|
|State||Published - Mar 1993|
- electrical alternans
- mechanical alternans
- orthodromic reciprocating tachycardia