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ST segment alternans during coronary angioplasty

✍ Scribed by Sochanski, Mirek ;Feldman, Ted ;Chua, K. G. ;Benn, Andrew ;Childers, Rory

Publisher: John Wiley and Sons
Year: 1992
Tongue: English
Weight: 296 KB
Volume: 27
Category: Article
ISSN: 0098-6569
DOI: 10.1002/ccd.1810270111

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

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.

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