Propranolol induced electrical and mechanical alternans in orthodromic reciprocating tachycardia.
During an electrophysiological study in a patient with a concealed accessory connection, there was no evidence of electrical or mechanical alternans during tachycardia until propranolol was administered, 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.
Crosson
J E
JE
Department of Pediatrics, University of Minnesota Hospital and Clinics, Minneapolis 55455.
Dunnigan
A
A
D000293:Adolescent; D002304:Cardiac Pacing, Artificial; D015150:Echocardiography, Doppler; D004562:Electrocardiography; D006329:Heart Conduction System / Q000187:drug effects* / Q000503:physiopathology; D006801:Humans; D008297:Male; D011433:Propranolol / Q000494:pharmacology* / Q000627:therapeutic use; D011674:Pulse / Q000187:drug effects* / Q000502:physiology; D013610:Tachycardia / Q000175:diagnosis / Q000188:drug therapy / Q000503:physiopathology*
D011433:Propranolol