PMID: 1525809Sep 1, 1992

ST segment alternans during coronary angioplasty

Catheterization and Cardiovascular Diagnosis
M SochanskiR W Childers


Four patients with severe proximal or mid-LAD stenosis were noted to have ST alternans during balloon angioplasty. Neither mechanical alternans nor increased ventricular ectopy were noted. In contrast to prior descriptions in animals or patients with variant angina, ST alternans did not occur following a premature ventricular contraction. Frequent use of calcium channel blockers during PTCA may interfere with the mechanism leading to electrical alternans and its consequences as seen in animal studies, accounting for the low frequency with which this phenomenon is noted during PTCA.


Nov 1, 1986·The American Journal of Cardiology·T FeldmanR W Childers
Oct 1, 1984·The American Journal of Cardiology·M JoyalC J Pepine


Jun 1, 1995·Catheterization and Cardiovascular Diagnosis·T KwanR A Stein
Jul 1, 1995·Journal of Electrocardiology·S HorinakaS Yagi
Mar 24, 1999·Angiology·T KwanL T Clark
Nov 14, 1997·Pacing and Clinical Electrophysiology : PACE·M A Murda'hA J Camm
May 1, 1994·Journal of Cardiovascular Electrophysiology·R L Verrier, B D Nearing

Related Concepts

Cardiac Arrhythmia
Electrocardiographic Recorders
Left Ventricular Structure
Myocardial Infarction
Signal Processing, Digital
Percutaneous Transluminal Coronary Angioplasty

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