Enhancing respiratory sinus arrhythmia increases cardiac output in rats with left ventricular dysfunction
نویسندگان
چکیده
منابع مشابه
Acute respiratory acidosis decreases left ventricular contractility but increases cardiac output in dogs.
To understand the cardiovascular response to respiratory acidosis, we measured hemodynamics, left ventricular pressure, and left ventricular volume (three ultrasonic crystal pairs) during eucapnia and respiratory acidosis in 10 fentanyl-anesthetized open-chest dogs. Left ventricular contractility was assessed primarily by measuring the slope (Emax) and intercept (V0) of the left ventricular end...
متن کاملRespiratory sinus arrhythmia in freely moving and anesthetized rats.
Heart rate increases during inspiration and slows during postinspiration; this respiratory sinus arrhythmia helps match pulmonary blood flow to lung inflation and maintain an appropriate diffusion gradient of oxygen in the lungs. This cardiorespiratory pattern is found in neonatal and adult humans, baboons, dogs, rabbits, and seals. Respiratory sinus arrhythmia occurs mainly due to inhibition o...
متن کاملHigh myocardial 18F-FDG uptake after chemotherapy in the presence of left ventricular dysfunction as well as 3-month later with no left ventricular dysfunction
Diffusely increased glucose metabolic activity in the right and left ventricles using 2-deoxy-2-(F-18) fluoro-D-glucose positron emission tomography/computed tomography (18F-FDGPET/CT) and global left ventricular hypokinesia at echocardiography can be evident in acute myocarditis. But, there has been no case report that the ventricular 18F-FDGuptake remains unchanged even ...
متن کاملActive orthostatic stress and respiratory sinus arrhythmia in patients with Chagas' disease with preserved left ventricular global systolic function.
OBJECTIVE To assess the use of the active orthostatic stress test for detecting vagal dysfunction in patients with Chagas' disease with preserved overall systolic function, and to compare it with the respiratory sinus arrhythmia test. METHODS Sixty-one chagasic patients (Ch) and 38 nonchagasic (NCh) patients with no significant evidence of heart disease or systemic diseases underwent Doppler ...
متن کاملRespiratory sinus arrhythmia, cardiac vagal control, and daily activity.
Ambulatory respiratory sinus arrhythmia (RSA) or high-frequency heart rate (HR) variability is frequently employed as an index of cardiac parasympathetic control and related to risk or severity of cardiovascular disease. However, laboratory studies indicate variations in physical activity and respiratory parameters of rate and tidal volume may confound estimation of vagal activity. Because litt...
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ژورنال
عنوان ژورنال: The Journal of Physiology
سال: 2019
ISSN: 0022-3751,1469-7793
DOI: 10.1113/jp277293