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Relation ship between QTLCinterval and heart risk factors in coronary heart disease patients |
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Abstract ObjectiveTo evaluate the relation ship between value of QTLC interval and heart risk factors in coronary heart disease patients. Methods The association of QTLC interval and heart risk factors and mortality in 39~75 years coronary heart disease patients of 300 men and 200 women was evaluated. Results Nomogram corrected QT interval(QTLC)prolongation and shortened was associated with elevated blood pressure and signs of cardiovascular disease with smoking. QTLC 5%~10% prolongation total cardiovascular sudden death mortality for 0.60%, over 10% prolongation of sudden death mortality for 1.00%; QTLC 5%~10% shortened of sudden death for 0.60%, over 10% shortened sudden death 1.40%. 5%~10% shortened QTLCpredicted cardiovascular sudden death in men and women with disease who smoked, mortality for 1.00%, over 10% shortened sudden death mortality for 1.20%; 5%~10% prolongation QTLCsudden death mortality for 0.60%, over 10% sudden death mortality for 1.00%. Implanting cardioverterdefibrillator (ICD) cure three patients prolongation QT interval and three short QT interval in one year during observation without malignant ventricular arrhythmia and mortality happen. Conclusion For coronary heart disease patients, prolonged and shortened QTLC interval predicts heart mortality and signs of cardiovascular disease. Signs of shortened and prolonged QTLC interval predicts death with heart disease who smoke. Implanting cardioverterdefibrillator could effectively decrease the incidence rate and mortality rate of malignant ventricular arrhythmia
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