Parasympathetic Control of Cardiac Sympathetic Activity
نویسندگان
چکیده
منابع مشابه
Parasympathetic control of cardiac sympathetic activity: normal ventricular function versus congestive heart failure.
BACKGROUND Muscarinic receptors on adrenergic nerve terminals attenuate norepinephrine release. The role of these receptors in the modulation of cardiac norepinephrine release in humans remains uncertain. METHODS AND RESULTS Twelve patients with normal left ventricular (LV) function and 18 with congestive heart failure (CHF) were studied. A radiotracer technique was used to measure cardiac no...
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BACKGROUND Diabetic cardiac autonomic dysfunction often causes lethal arrhythmia and sudden cardiac death. 123I-Metaiodobenzylguanidine (MIBG) can evaluate cardiac sympathetic dysfunction, and analysis of heart rate variability (HRV) can reflect cardiac parasympathetic activity. We examined whether cardiac parasympathetic dysfunction assessed by HRV may correlate with sympathetic dysfunction as...
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The present study tested the hypothesis that activation of the parasympathetic nervous system could attenuate sympathetic activation to the pancreas. To test this hypothesis, we measured pancreatic norepinephrine (NE) spillover (PNESO) in anesthetized dogs during bilateral thoracic sympathetic nerve stimulation (SNS; 8 Hz, 1 ms, 10 mA, 10 min) with and without (randomized design) simultaneous b...
متن کاملCardiac sympathetic afferent stimulation impairs baroreflex control of renal sympathetic nerve activity in rats.
It is well known that cardiac sympathetic afferent reflexes contribute to increases in sympathetic outflow and that sympathetic activity can antagonize arterial baroreflex function. In this study, we tested the hypothesis that in normal rats, chemical and electrical stimulation of cardiac sympathetic afferents results in a decrease in the arterial baroreflex function by increasing sympathetic n...
متن کاملAdvances in Parasympathetic Control of Heart Rate and Cardiac Function.
It is well known that the neuronal projections from the brain to the heart strongly influence cardiac function, and an abnormal activity has been implicated in diseases such as cardiac arrhythmia and sudden infant death syndrome. This short review describes recent advances focused on the neurobiology of cardiac vagal neurons, utilizing cellular techniques.
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ژورنال
عنوان ژورنال: Circulation
سال: 1999
ISSN: 0009-7322,1524-4539
DOI: 10.1161/01.cir.100.3.274