1979
DOI: 10.1161/01.cir.59.1.66
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Improvement of myocardial perfusion and left ventricular function after coronary artery bypass grafting in patients with unstable angina.

Abstract: SUMMARY Changes in myocardial perfusion and left ventricular function were evaluated pre-and postoperatively (3-6 months) in 14 patients with unstable angina who underwent coronary artery bypass surgery. Perfusion was studied with intracoronary and intragraft injections of radiolabeled macroaggregated albumin particles. Of 20 abnormal perfusion areas identified preoperatively, 13 demonstrated improved perfusion postoperatively. Segmental analysis of the left ventriculogram demonstrated improved wall motion in … Show more

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Cited by 73 publications
(8 citation statements)
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“…An Anderson actuarial survival and event-free study was made of the three groups ( figure 5). The cumulative actuarial survival at 24 to allocate a particular patient without ambiguity to a certain diagnostic category. Consequently, the patient's prognosis is estimated more accurately and the most appropriate therapy can be determined.…”
Section: Resultsmentioning
confidence: 99%
“…An Anderson actuarial survival and event-free study was made of the three groups ( figure 5). The cumulative actuarial survival at 24 to allocate a particular patient without ambiguity to a certain diagnostic category. Consequently, the patient's prognosis is estimated more accurately and the most appropriate therapy can be determined.…”
Section: Resultsmentioning
confidence: 99%
“…The only data available are the results of studies29,32-36 that measured ventricular function at two time points: shortly after hospital admission (during the acute phase of unstable angina) and several days or weeks later (after the syndrome had resolved). These studies29'32-36 have consistently documented an improvement of wall motion from the first to the second time point, both with medical therapy33'36 and with mechanical revascularization (either PTCA34-36 or coronary artery bypass grafting [CABG] 29,32). Because all of the measurements were obtained when the patients were pain-free,29'3236 the reversible abnormalities noted on admission could have represented myocardial stunning secondary to earlier acute ischemia.…”
Section: Myocardial Stunning In Unstable Anginamentioning
confidence: 99%
“…Reversal of myocardial asynergy follows three basic types of interventions: the diminution of myocardial oxygen demand, as mediated by preload reduction;22 direct inotropic stimulation of hypocontractile segments, as noted with postextrasystolic potentiation23 or catecholamines;24 and improvement of myocardial blood flow, as seen with coronary artery bypass surgery. 25 In this study, improvement in wall motion after nitroglycerin was associated with a significant decrease in systolic blood pressure, as well as diminutions in both enddiastolic and end-systolic volumes. Because such changes diminish myocardial wall stress26 and myocardial oxygen consumption,12 improvement in wall motion abnormalities after nitroglycerin was possible.…”
Section: Mechanisms For Reversible Asynergymentioning
confidence: 49%