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Objective: To evaluate the J wave on the predictive value of malignant ventricular arrhythmias after acute myocardial infarction . Methods: A retrospective analysis of 130 patients with acute ST-segment elevation myocardial infarction in patients with ECG and clinical data , J wave groups divided according to the presence or absence of ECG J wave and J wave group . First, the two groups were compared baseline characteristics differences . Secondly , the two groups were compared with myocardial infarction , the incidence of malignant ventricular arrhythmias and QT dispersion (QTd) , T crests the - last interval ( TpTe ) . Finally, the J wave group is divided into subgroups of malignant ventricular arrhythmias and malignant ventricular arrhythmia subgroup , the two groups were compared QTd and TpTe of . Results: 1 J after acute myocardial infarction in baseline characteristics between the composition of the wave group and no patients with J wave group no significant difference ( P gt ; 0.05 ) . 2 , acute myocardial infarction after the emergence of the J wave was 16.15% , more common in inferior wall myocardial infarction ( 52.38% vs 26.61 % , P lt; 0.05 ) . J -wave group the incidence of malignant ventricular arrhythmias was significantly higher than the J wave group ( 28.57% vs. 1.83 % , P lt ; 0.01) , the difference was significant , including the J wave group there were five cases of patients with ventricular tachycardia , 1 case of ventricular fibrillation . ( 121 ± 33 ms vs 99 ± 26 ms , P lt ; 0.01 ) J wave group was significantly longer than 4 J -wave group QTd (76 ± 19ms vs 47 ± 19 ms, P lt; 0.01) and TpTe difference extremely significant . Compared with the normal J wave group TpTe ( 121 ± 33 ms vs 92 ms , P lt ; 0.01) was significantly longer , the difference was significant . 5, J -wave group of malignant ventricular arrhythmias occurred QTd ( 97 ± 15ms vs 68 ± 13 ms , P lt ; 0.01 ) and TpTe (157 ± 27ms vs 107 ± 22 ms, P lt; 0.01) than those without malignant ventricular arrhythmias was prolonged, the difference was significant . Conclusion: ECG J wave prompted ventricular transmural dispersion of repolarization increases , can be used as a predictor of acute myocardial infarction in patients with malignant ventricular arrhythmias . 2 , J wave appears , accompanied by ventricular transmural dispersion of repolarization significant increase in those high-risk groups for acute myocardial infarction , malignant ventricular arrhythmias .
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