منابع مشابه
Oral magnesium therapy, exercise heart rate, exercise tolerance, and myocardial function in coronary artery disease patients.
BACKGROUND Previous studies have demonstrated that in patients with coronary artery disease (CAD) upward deflection of the heart rate (HR) performance curve can be observed and that this upward deflection and the degree of the deflection are correlated with a diminished stress dependent left ventricular function. Magnesium supplementation improves endothelial function, exercise tolerance, and e...
متن کاملEffects of Pentoxifylline on Oxygenation and Exercise Tolerance in Patients with Severe Chronic Obstructive Pulmonary Disease
Background: It was hypothesized that the use of Pentoxifylline would increase arterial O2 saturation and increase exercise tolerance in patients with Chronic Obstructive Pulmonary Disease (COPD). Methods: We tested this hypothesis in 23 patients with COPD and pulmonary hypertension. Patients were randomized to receive Pentoxifylline or placebo, each for a 12-week period, in a prospectiv...
متن کاملExercise tolerance in asymptomatic patients with moderate-severe valvular heart disease and preserved ejection fraction
INTRODUCTION For asymptomatic patients with moderate-severe valvular heart disease, in whom symptoms may be obscured, objective exercise tolerance measures are warranted for decisions concerning physical activities and surgical treatment. MATERIAL AND METHODS We compared 61 patients (39 with aortic stenosis, 22 with aortic or mitral regurgitation) to 23 controls without valvular heart disease...
متن کاملExercise Intolerance in Adult Congenital Heart Disease
Background—Although some patients with adult congenital heart disease (ACHD) report limitations in exercise capacity, we hypothesized that depressed exercise capacity may be more widespread than superficially evident during clinical consultation and could be a means of assessing risk. Methods and Results—Cardiopulmonary exercise testing was performed in 335 consecutive ACHD patients (age, 33 13...
متن کاملBlood flow redistribution during exercise contributes to exercise tolerance in patients with chronic heart failure.
BACKGROUND It is widely known that blood flow redistribution is impaired in patients with chronic heart failure (CHF). However, the relationship between exercise tolerance and the degree of blood flow redistribution is not fully understood. Whole-body thallium-201 chloride ((201)Tl) scintigraphy can estimate blood flow distribution. This study will evaluate the relationship between exercise tol...
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ژورنال
عنوان ژورنال: JAMA: The Journal of the American Medical Association
سال: 1922
ISSN: 0098-7484
DOI: 10.1001/jama.1922.02640270003002