نتایج جستجو برای: prolonged qtc interval
تعداد نتایج: 283643 فیلتر نتایج به سال:
OBJECTIVES To study the effect of disease duration, treatment and risk factors on QTc interval among young hypertensives. MATERIALS AND METHODS A case-control study was conducted on 142 hypertensives (60 males, 82 females) taking calcium channel blocker (CCB) or angiotensin-converting enzyme inhibitor (ACEI) as monotherapy. After blood pressure measurement, we recorded lead II electrocardiogr...
Hyperthyroidism is a highly prevalent disease affecting over 4 million people in the US. The disease is associated with many cardiac complications including atrial fibrillation and also less commonly with ventricular tachycardia and fibrillation. Many cardiac pathologies have been extensively studied; however, the relationship between hyperthyroidism and rate of ventricular repolarization manif...
BACKGROUND Acute cerebral events play an important role in generating autonomic imbalance especially cardiac rhythm disturbances. This forms the basis of significant lethal abnormalities of heart rate and rhythm like QTc prolongation, ventricular fibrillation, asystole, and ultimately death. This study was conducted to determine the frequency of QTc prolongation in patients presenting with acut...
BACKGROUND The 5-hydroxytryptamine type 3 antagonists, or setrons (eg, ondansetron), are commonly used for nausea and vomiting in the hospital setting. In 2001, droperidol was given a black box warning because it was found to prolong the QT interval and induce arrhythmias. The setrons share with droperidol the same potential proarrhythmic mechanisms, but limited data exist concerning their effe...
OBJECTIVE To study the effects of variability in the duration of the QT interval corrected for heart rate (QTc) on the occurrence of sudden death. DESIGN Nested case-referent study. SUBJECTS Cohort of 6693 consecutive patients who underwent 24 hour electrocardiography and were followed up for two years. Risk implications of QTc interval variables were studied in patients without evidence of...
BACKGROUND In certain subgroups of patients, prolongation of the QTc interval may increase total and cardiovascular mortality due to life-threatening ventricular arrhythmias and sudden death. Nonetheless, whether modest prolongation of the QTc interval in the general population has clinical importance remains unclear. METHODS We conducted a literature search from 1990 forward to identify all ...
BACKGROUND QT interval has been shown to be associated with cardiovascular events. There is no data regarding the association between QT interval and left ventricular (LV) function and prognosis in patients with low LV ejection fraction (LVEF), low-flow, low-gradient aortic stenosis (LF-LG AS). We aimed to examine the relationship between corrected QT interval (QTc) and LV function and outcome ...
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