نتایج جستجو برای: cardiac rhythm
تعداد نتایج: 299877 فیلتر نتایج به سال:
Ventricular fibrillation (VF) is the primary arrhythmia in majority of patients suffering from sudden cardiac attacks that has been focused on particular rhythm. In earlier stage an electrical defibrillator was utilized to treat the sudden cardiac attack with monophasic pulse. This pulse distributes energy to the patient’s heart in only one direction. Thus the tissues of the body will be affect...
Background: Conduct of cardiopulmonary bypass (CPB) due to the higher volume of priming solution in comparison to the total blood volume in children requires careful consideration. Recently attention has been focused on the potential risk of hyperkalemia in these patients. Given its significant effects on cardiac rhythm, hyperkalemia is considered a medical emergency. In this cross-sectional st...
Listen to the heart sounds gives us valuable information about existence of disorder in heart rate and rhythm, ventricular fibrillation and movement of blood through valves. This required a lot of skills. So it is necessary to understand and apply these skills for nurses in cardiac and intensive care. Abnormal sounds can be recognized by them. For facilitation this work, nurses should be have...
Heart rhythm disorders are a leading contributor to morbidity and mortality in the industrialized world. Treatment and prevention of cardiac rhythm disorders remains difficult because the electrical signal that controls the heart rhythm is determined by complex, multi-scale biological processes. Data-driven computer simulation is a promising tool for facilitating a better understanding of cardi...
BACKGROUND Expectations that reestablishing and maintaining sinus rhythm in patients with atrial fibrillation might improve survival were disproved in the Atrial Fibrillation Follow-up Investigation of Rhythm Management (AFFIRM) study. This report describes the cause-specific modes of death in the AFFIRM treatment groups. METHODS AND RESULTS All deaths in patients enrolled in AFFIRM underwent...
Significant circadian variations exist in the frequency of cardiac arrhythmia, but few studies have examined the relation between cardiac ion channels genes and biological clocks. We investigated this relation using suprachiasmatic nuclei lesion (SCNX) and pharmacological autonomic nervous system block (ANSB) mice. Significant 24-h variations were observed in the expression of clock genes Per2,...
background: conduct of cardiopulmonary bypass (cpb) due to the higher volume of priming solution in comparison to the total blood volume in children requires careful consideration. recently attention has been focused on the potential risk of hyperkalemia in these patients. given its significant effects on cardiac rhythm, hyperkalemia is considered a medical emergency. in this cross-sectional st...
OBJECTIVE In the present study, we aimed to define the factors contributing to patient survival after treatment by cardiopulmonary resuscitation (CPR) following cardiac arrest. MATERIAL AND METHOD Retrospective analysis was performed on cardiac arrest patients (n=138) who had CPR in the emergency department (ED) at Thammasat University hospital from 2007-2009. Logistic regression was used to ...
Ventricular arrhythmias and electrophysiological consequences of myocardial ischemia and infarction.
The derangements of cardiac rhythm that result from occlusion of coronary arteries caught the attention of the earliest experimenters in the field. By the time of the studies of Porter in 1894, it was known that "fibrillar contractions" often were the end result of coronary occlusion and that irregularities of cardiac rhythm commonly preceded terminal ventricular fibrillation. Porter remarked t...
Frequency- and time-domain analyses were used to compare the effects of stimulation of the defense region of the midbrain periaqueductal gray (PAG) on the 10-Hz and cardiac-related discharges of sympathetic nerves with different cardiovascular targets. In baroreceptor-denervated cats anesthetized with urethan, PAG stimulation at frequencies equal to or higher (up to 25 Hz) than that of the free...
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