Caffeine Decreases Exercise-Induced Myocardial Flow Reserve
نویسندگان
چکیده
منابع مشابه
Caffeine 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 کاملHow does caffeine increase exercise capacity but decrease myocardial flow reserve?
My fellow authors and I appreciate the comments expressed in Dr. Horvath’s letter, which largely claim that the sole reason for the negative results demonstrated in our study (1) relates to procedural differences between surgical versus percutaneous transmyocardial laser revascularization (TMR). Although we acknowledged in our study that full-thickness transmyocardial laser channels at surgery ...
متن کاملMyocardial 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 کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of the American College of Cardiology
سال: 2006
ISSN: 0735-1097
DOI: 10.1016/j.jacc.2005.08.064