Amiodarone induced rate-related QRS widening during myocardial ischemia in man
نویسندگان
چکیده
منابع مشابه
Summation and Cancellation Effects on QRS and ST-Segment Changes Induced by Simultaneous Regional Myocardial Ischemia
Simultaneous ischemia in two myocardial regions is a potentially lethal clinical condition often unrecognized whose corresponding electrocardiographic (ECG) patterns have not yet been characterized. Thus, this study aimed to determine the QRS complex and ST-segment changes induced by concurrent ischemia in different myocardial regions elicited by combined double occlusion of the three main coro...
متن کاملEvaluation of depolarization changes during acute myocardial ischemia by analysis of QRS slopes.
OBJECTIVE This study evaluates depolarization changes in acute myocardial ischemia by analysis of QRS slopes. METHODS In 38 patients undergoing elective percutaneous coronary intervention, changes in upward slope between Q and R waves and downward slope between R and S waves (DS) were analyzed. In leads V1 to V3, upward slope of the S wave was additionally analyzed. Ischemia was quantified by...
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Myocardial electrolyte balance and lactate metabolism were studied in 30 patients before, during, and after a period of atrial pacing utilizing a continuous automated sampling technic with simultaneous electrocardiographic and hemodynamic observations. Eight patients with coronary artery disease who had no symptoms during pacing and four normal subjects demonstrated myocardial potassium loss bu...
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The effects of inosine (INO) on substrate metabolism and rigor formation in ischemic myocardium were examined in isolated rabbit hearts. Metabolite content was assessed in tissue extracts by chemical analysis and in the whole heart by `C and 31P nuclear magnetic resonance spectroscopy. In ischemic hearts metabolizing either [3-'3Clpyruvate or [1-13C glucose, 1 mM INO increased both total and D3...
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We have investigated the rate of rise of myocardial PCO2 (PmCO2) after coronary artery occlusion using a new method for this measurement. Previous studies of PmCO2 have been limited by the slow response of the only available method, and no increase in MmCO2 prior to 3 minutes after occlusion has been found. We have implanted a miniature PCO2 electrode, with a 63% response time of 14 seconds, in...
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ژورنال
عنوان ژورنال: Journal of the American College of Cardiology
سال: 1990
ISSN: 0735-1097
DOI: 10.1016/0735-1097(90)92653-j