Fifty percent stenosis and myocardial flow reserve
نویسندگان
چکیده
منابع مشابه
Myocardial Blood Flow and Flow Reserve
Background. Aging is associated with changes of the systolic blood pressure that may increase cardiac work and myocardial blood flow at rest and reduce the myocardial flow reserve. This might be misinterpreted as age-related impairment of the coronary vasodilator capacity. Methods and Results. Myocardial blood flow was quantified at rest and after administration of intravenous dipyridamole in 4...
متن کاملMyocardial capillaries and coronary flow reserve.
he general assumption among cardiologists is that myoardial ischemia occurs only in the presence of obstructive oronary artery disease. This is based on the misconception hat abnormal coronary flow reserve (CFR) is associated nly with coronary stenosis and results from the increased esistance offered by the stenosis. We showed some time ago hat when the normal coronary vasculature is maximally ...
متن کامل[Myocardial bridging and fractional flow reserve].
Rev Esp Cardiol. 2005;58(9):1117 1117 A 69-year-old patient with a history of hypertension was admitted to the hospital for an acute coronary syndrome. Coronary arteriography showed a myocardial bridge at the mid-distal third of the left anterior descending artery with marked systolic compression. The fractional flow reserve (FFR) following intravenous infusion of adenosine (140 μg/kg) was 0.68...
متن کاملCaffeine decreases exercise-induced myocardial flow reserve.
OBJECTIVES We studied the acute effect of caffeine on myocardial blood flow (MBF) at rest and exercise in healthy volunteers at normoxia and during acute exposure to simulated altitude. BACKGROUND Caffeine is a widely consumed stimulant, although its cardiovascular safety remains controversial and its effect on MBF is unknown. METHODS 15O-labeled H2O and positron emission tomography (PET) w...
متن کاملImpairment of coronary flow reserve in aortic stenosis.
Coronary flow reserve (CFR) is markedly reduced in patients with severe aortic valve stenosis (AS), but the exact mechanisms underlying this impairment of CFR in AS remain unclear. Reduced CFR is the key mechanism leading to myocardial ischemia symptoms and adverse outcomes in AS patients. The objective of this study was to develop an explicit mathematical model formulated with a limited number...
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ژورنال
عنوان ژورنال: Journal of the American College of Cardiology
سال: 1983
ISSN: 0735-1097
DOI: 10.1016/s0735-1097(83)80261-7