منابع مشابه
Effects of caffeine on blood pressure, heart rate, and forearm blood flow during dynamic leg exercise.
This study examined the acute effects of caffeine on the cardiovascular system during dynamic leg exercise. Ten trained, caffeine-naive cyclists (7 women and 3 men) were studied at rest and during bicycle ergometry before and after the ingestion of 6 mg/kg caffeine or 6 mg/kg fructose (placebo) with 250 ml of water. After consumption of caffeine or placebo, subjects either rested for 100 min (r...
متن کامل4D Blood Flow in the Left Heart
Introduction: Due to the complex 3-dimensional (3D) nature of the beating left heart and flow direction through the chambers, normal physiological as well as pathologically altered blood flow conditions are difficult to assess in-vivo. MR studies using comprehensive 3-dimensional (3D) and 3-directionally encoded techniques, (flow-sensitive 4D MRI) have given information on multidirectional bloo...
متن کاملBlood flow dynamics in heart failure.
BACKGROUND Exercise intolerance in heart failure (HF) may be due to inadequate vasodilation, augmented vasoconstriction, and/or altered muscle metabolic responses that lead to fatigue. METHODS AND RESULTS Vascular and metabolic responses to rhythmic forearm exercise were tested in 9 HF patients and 9 control subjects (CTL) during 2 protocols designed to examine the effect of HF on the time co...
متن کاملIntrarenal blood flow in congestive heart failure.
Intrarenal blood flow distribution was measured by the '33xenon washout technic in 10 patients with heart disease who were studied at time of left and right heart catheterization. Renal washout curves were analyzed by computer using a weighted least-squares nonlinear regression technic. In three patients with heart disease without edema the compartment I blood flow rates (outer cortex) were not...
متن کاملEvaluation of diastolic blood flow dynamic of the left ventricle in dogs with mitral valve regurgitation using vector flow mapping
Mitral valve regurgitation (MVR) is a common valvular disease in dogs. Hydrokinetic evaluation of the blood flow within the ventricles has become possible by vector flow mapping (VFM), which shows the blood flow within the ventricles in vector and vortex flows. Blood flow within the left ventricle of MVR dogs was compared at different stages of MVR and to that of normal dogs. 14 normal dogs and...
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ژورنال
عنوان ژورنال: Biophysical Journal
سال: 2017
ISSN: 0006-3495
DOI: 10.1016/j.bpj.2016.11.229