P645Effect of atrial fibrillation on cardiac output, exercise tolerance and heart rate response during exercise
نویسندگان
چکیده
منابع مشابه
Relationship between impaired chronotropic response, cardiac output during exercise, and exercise tolerance in patients with chronic heart failure.
The present study was undertaken to investigate the relationship between the extent of impaired chronotropic response and cardiac output during exercise, and exercise tolerance in patients with chronic heart failure. The subjects consisted of 24 patients (mean 60.1 +/- 14.0 years) who had mild chronotropic incompetence. Cardiopulmonary exercise testing was performed in all patients, and heart r...
متن کاملWhat determines the heart rate response to exercise in patients with atrial fibrillation?
We evaluated the factors that determine the heart rate response to exercise in 60 patients with atrial fibrillation (25 men and 35 women, with a mean age of 61+/-10 years) who underwent symptom limited cardiopulmonary exercise testing with blood sampling of atrial natriuretic peptide (ANP), 2-dimensional echocardiography and cardiac catheterization. Atrial muscles resected during the Maze opera...
متن کاملEffect of betaxolol on the hemodynamic, gas exchange, and cardiac output response to exercise in chronic atrial fibrillation.
BACKGROUND beta-blockade controls the ventricular response to exercise in chronic atrial fibrillation (AF), but the effects of beta-blockers on exercise capacity in AF have been debated. METHODS Twelve men with AF (65+/-8 years) participated in a randomized, double-blind, placebo-controlled study of betaxolol (20 mg daily). Patients underwent maximal exercise testing with ventilatory gas exch...
متن کاملInfluence of physical exercise on serum digoxin concentration and heart rate in patients with atrial fibrillation.
Heart rate and serum digoxin concentration in eight patients with atrial fibrillation were studied at rest and during exercise when initial serum digoxin concentrations were zero and at low and high therapeutic values. Eight patients with ischemic heart disease and in sinus rhythm were studied for comparison. Though the serum digoxin concentration decreased significantly during exercise, the ab...
متن کاملMeasurement of cardiac output during exercise.
T here are a variety of reasons why the clinician would want to measure cardiac output. In the intensive care unit (ICU), life-threatening hypoperfu-sion states may be subject to manipulation. Outside the ICU, low cardiac output may limit the quality of life. A functional definition of heart failure is a cardiac output insufficient for metabolic needs. Implicit in this is the magnitude of these...
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ژورنال
عنوان ژورنال: European Heart Journal
سال: 2017
ISSN: 0195-668X,1522-9645
DOI: 10.1093/eurheartj/ehx501.p645