نتایج جستجو برای: hemodynamic change
تعداد نتایج: 622539 فیلتر نتایج به سال:
This tutorial presents several misconceptions related to the use the General Linear Model (GLM) in functional Magnetic Resonance Imaging (fMRI). The goal is not to present mathematical proofs but to educate using examples and computer code (in Matlab). In particular, I address issues related to (1) model parameterization (modeling baseline or null events) and scaling of the design matrix; (2) h...
To assess the clinical efficacy of chronic vasodilator therapy for refractory congestive heart failure, the long-term follow-up (mean 13 months, range 3-30 months) was evaluated in 56 patients treated with hydralazine, usually in combination with nitrates. In the first 6 months, 73% improved subjectively and 59% improved by one or two New York Heart Association classifications; early improvemen...
BACKGROUND Earlier studies have yielded conflicting evidence on whether or not cardiac resynchronization therapy (CRT) improves left ventricular (LV) rotation mechanics. METHODS AND RESULTS In dogs with left bundle branch block and pacing-induced heart failure (n=7), we studied the effects of CRT on LV rotation mechanics in vivo by 3-dimensional tagged magnetic resonance imaging with a tempor...
To assess the clinical efficacy of chronic vasodilator therapy for refractory congestive heart failure, the long-term follow-up (mean 13 months, range 3-30 months) was evaluated in 56 patients treated with hydralazine, usually in combination with nitrates. In the first 6 months, 73% improved subjectively and 59% improved by one or two New York Heart Association classifications; early improvemen...
terms of address as an important linguistics items provide valuable information about the interlocutors, their relationship and their circumstances. this study was done to investigate the change route of persian address terms in the two recent centuries including three historical periods of qajar, pahlavi and after the islamic revolution. data were extracted from a corpus consisting 24 novels w...
Background: Studies on hemodynamic changes in brain death are in vitro and in animal studies. And very few studies have been done on the hemodynamic changes of brain death. The aim of this study was to use advanced hemodynamic monitoring with echocardiography for evaluation of donated heart and to evaluate the moment by moment brain death patients with advanced hemodynamic monitoring tools and ...
Background: Tracheal intubation and direct laryngoscopy are powerful noxious stimuli that can elicit sever hemodynamic responses. These hemodynamic responses should be attenuated by appropriate use of premedication, smooth induction of anesthesia and rapid tracheal intubation. Gabapentin and pregabalin have been suggested in several studies to be efficient. Gabapentin is an antiepileptic drug a...
Introduction: One of the most common problems during laryngoscopy involves sympathetic system stimulation and the subsequent hemodynamic changes. It is a key measure to maintain the hemodynamic stability of patients with cardiovascular diseases during induction of anesthesia. This study attempted to compare the hemodynamic effects of laryngeal mask airway and combitube. Methods: This prospec...
Background: Today, coronary artery bypass graft surgery (CABG) in many patients is commonly used to treat complications of the disease. Aim: This study aimed to evaluate the impact of cardiac rehabilitation on hemodynamic parameters in patients undergoing CABG. Methods: : In this clinical trial which was conducted in Rajaee Hospital of Tehran University of Medical Sciences 100 patients after co...
Background: Electroconvulsive therapy (ECT) is a safe and practical treatment method for patients with severe, refractory or emergency psychiatric disorders. However, it is often associated with hemodynamic fluctuations. Objective: The purpose of this study was to investigate the pattern of hemodynamic changes in patients undergoing ECT. Methods: This longitudinal study was conducted at Sha...
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