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The purpose of this study is to determine the efficacy of Magnesium sulphate for the rate and rhythm control of the new onset (within 48 hours) atrial fibrillation in the hemodynamically unstable patients, admitted in the medical intensive care unit patients.
Atrial fibrillation is one of the most common arrhythmia, reported in the hemodynamically unstable patients in the intensive care unit. Loss of atrial contraction and the sequential atrioventricular contraction decrease the overall cardiac output which results in severe inadequate tissue perfusion. Medications aim for rate and rhythm control are recommended to treat new onset atrial fibrillation. These drugs (verapamil, diltiazem, amiodarone and beta blockers) may further compromise the patients' cardiac output by its' negative inotropic effect.
Magnesium sulphate with the cell membrane threshold potential stabilizing effect has been reported as an effective drug for rate and rhythm control for post-operative atrial fibrillation and the atrial fibrillation presented in the hospital emergency unit. However, there was inadequate data about the efficacy of Magnesium sulphate for treatment of new onset atrial fibrillation in the hemodynamically unstable patients admitted in the medical intensive care unit.
Allocation: Randomized, Control: Placebo Control, Endpoint Classification: Efficacy Study, Intervention Model: Parallel Assignment, Masking: Double Blind (Subject, Caregiver, Investigator, Outcomes Assessor), Primary Purpose: Treatment
Placebo, Magnesium sulphate
Faculty of Medicine, Siriraj Hospital, Mahidol University
Published on BioPortfolio: 2014-07-23T21:11:05-0400
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Rapid, irregular atrial contractions caused by a block of electrical impulse conduction in the right atrium and a reentrant wave front traveling up the inter-atrial septum and down the right atrial free wall or vice versa. Unlike ATRIAL FIBRILLATION which is caused by abnormal impulse generation, typical atrial flutter is caused by abnormal impulse conduction. As in atrial fibrillation, patients with atrial flutter cannot effectively pump blood into the lower chambers of the heart (HEART VENTRICLES).
Long-term changes in the electrophysiological parameters and/or anatomical structures of the HEART ATRIA that result from prolonged changes in atrial rate, often associated with ATRIAL FIBRILLATION or long periods of intense EXERCISE.
A cardiotonic glycoside obtained mainly from Digitalis lanata; it consists of three sugars and the aglycone DIGOXIGENIN. Digoxin has positive inotropic and negative chronotropic activity. It is used to control ventricular rate in ATRIAL FIBRILLATION and in the management of congestive heart failure with atrial fibrillation. Its use in congestive heart failure and sinus rhythm is less certain. The margin between toxic and therapeutic doses is small. (From Martindale, The Extra Pharmacopoeia, 30th ed, p666)
Impaired or delayed impulse conduction between the right and left HEART ATRIA. Advanced interatrial blocks are often associated with arrhythmias (e.g., ATRIAL FLUTTER; and ATRIAL FIBRILLATION), direct conduction block via the Bachmann's bundle and concomitant left atrial enlargement. Syndrome of advanced interatrial block associated with SUPRAVENTRICULAR TACHYCARDIA is referred to as Bayes syndrome.
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