[Early mortality among patients with supraventircular tachyarrhythmia after acute myocardail infarction]

In this study the frequency of early term mortality [1 months] was evaluated among patients with early supraventricular tachyarrhythmia [<72 hours] during the first acute myocardial infarction [AMI]. In this prospective descriptive study, we studied 315 patients with the first S-T elevation AMI. Various factors including age, gender, risk factors and types of supraventricular tachyarrhythmias [within first 72 hours of CCU admission] were assessed based on medical records. Early cardiovascular mortality [30 days sudden cardiac death or acute coronary syndrome complicated with death] was probed through out-patient clinic. Among 300 patients, 208 individuals [69.3%] had one tachyarrhythmia with 8.1% mortality, 78 patients [26%] had two tachyarrhythmia with 12.8% mortality and the rest 11[3.7%] had three tachyarrhythmia with 45% mortality. Mortality among patients with and without atrial tachycardia [AT] was 36% and 9.4%, respectively [p<0.05], but in patients with and without atrial fibrillation [AF] was 20% and 9%, respectively [p>0.05]. Mortality among patients with and without atrial premature contraction [APCs] was 8% and 14%, respectively, [p>0.05] while among patients with and without sinus tachycardia [ST] was 15% and 5%, respectively. [p<0.05]. Early mortality [within 30 days] was more frequent among patients with S-T elevation myocardial infarction complicated with sinus tachycardia, atrial tachycardia and multiple simultaneously supraventricular tachyarrhythmia

Effect of coronary artery bypass graft on qt interval dispersion: a measure of inhomogeneity in ventricular repolarization

The QT interval dispersion [QTd] has been described as the maximum minus minimum QT intervals in simultaneously 12-lead electrocardiographic recording which reflect inhomogeneity in myocardial repolarization. Increased QTd has been illustrated in patients with a variety of cardiac diseases such as myocardial infarction and left ventricular dysfunction and was suggested as a risk factor for development of ventricular arrhythmias and sudden death. QTd may also be a prognostic factor in patients undergoing Coronary Artery Bypass Grafting [CABG]. The purpose of this study was to evaluate the influence of CABG on QTd in patients with coronary artery disease. In this retrospective study we evaluated the effect of CABG on QTd in 79 consecutive patients with coronary artery disease. Measurement of QTd was performed on ECGs taken before and 24 hours after operation. There was no significant QTd changes in post CABG patients compared with baseline QTd [0.06 +/- 0.04 vs. 0.06 +/- 0.03, P=0.18]. In subgroups analysis, decrease in QTd was observed following CABG only in those with two-vessel coronary involvement compared with baseline [0.05 +/- 0.04 SD seconds versus 0.07 +/- 0.02SD seconds, P<0.05]. The present study showed that CABG does not affect QTd except in few patients with two-vessel coronary involvement