نتایج جستجو برای: cardiac reflex
تعداد نتایج: 297097 فیلتر نتایج به سال:
Introduction & Objectives: In recent studies, the negative effects of smoking on different parts of body have been cleared. Nevertheless other negative effects of smoking are being investigated. One of those effects is central and peripheral nervous system problem. The aim of this investigation was comparison of Hoffmann (H) reflex latency of tibial nerve in male smokers and non smokers between...
Paroxysmal Permanent Junctional Reciprocating Tachycardia (PJRT) is caused after rapid and sudden pacing of excitatory foci in atrioventricular junction . While it happens mostly in infants and children, it is rarely seen in adults. A 30-year-old female came to our emergency department repeatedly with the chief complaint of palpitation. She was later diagnosed with PSVT and throughout her s...
There is growing scepticism over utility of tilt-testing for syncope diagnosis, which has been shown unable to distinguish vasovagal from other syncope, especially cardiac, despite its acceptable sensitivity and specificity in true positive and negative subjects. The new interpretation is that the test reveals a susceptibility to reflex hypotension, which may exist in coincidence with any cause...
Background: Cerebral palsy is the term used to describe a movement disorder though to be the result of nonprogressive brain damage. Due to damage to CNS, it is associated with articulation disorder and abnormal feeding reflex. Lack of oral function control and coordination following feeding reflex disorders. Articulation disorders are seen in most of the cerebral palsied patients.This research ...
Abstract Background and aim: Nausea reflex during impression-taking is a concern that decreases the patient's ability to accept dental procedures. There are several methods for elimination of nausea reflex, Prescription of Metoclopramide is one of these pharmaceutical methods. The aim of this study is to evaluate effect of Metoclopramide on the elimination of nausea reflex during impression-tak...
Time-varying elastance models have been used extensively in the past to simulate the pulsatile nature of cardiovascular waveforms. Frequently, however, one is interested in dynamics that occur over longer time scales, in which case a detailed simulation of each cardiac contraction becomes computationally burdensome. In this paper, we apply circuit-averaging techniques to a periodically driven, ...
The properties and latencies of potentials evoked in cardiac (CN) and renal (RN) sympathetic nerves by electrical stimulation of the sinus, aortic and hypoglossal nerves were studied in cats. Electrical stimulation of the sinus nerve evoked only excitatory responses in the sympathetic nerves. Electrical stimulation of the aortic nerve fibers evoked excitatory or inhibitory responses in sympathe...
The reflex cardiac and respiratory effects of stepwise pressure variations in the isolated aortic arch were determined in anesthetized dogs. Elevation of pressure in the aortic arch depressed respiratory movements, decreased heart rate in the unpaced heart, and diminished peak pressure in the paced, isovolumetric left ventricle preparation. The threshold for these reflex effects was an aortic a...
Cardiac rhythm was monitored in 219 patients who had ocular operations under general anaesthesia and in 15 patients who had cataract surgery under local analgesia. Of these, 140 were children having squint surgery. The high incidence of the oculo-cardiac reflex and the adequate protective effect of atropine 0-01 mg/kg given intravenously was confirmed. Isolated extrasystoles were common, partic...
The influence of acute and chronic treatment with felodipine on ambulatory intra-arterial blood pressure, certain cardiac reflexes, and plasma renin activity was studied in nine patients with essential hypertension. Acute oral administration of the drug caused a significant reduction in blood pressure associated with an increase in heart rate mediated by the sinoaortic baroreceptor-heart rate r...
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