Giá trị của một số chỉ số điện tâm đồ trong chẩn đoán rối loạn chức năng tâm trương thất trái ở bệnh nhân tăng huyết áp nguyên phát

This is a cross-sectional study, including 169 patients at the Vietnam Heart Institute. All study subjects had standard 12-lead electrocardiogram and were divided into 2 groups based on echocardiographic results to diagnose left ventricular diastolic dysfunction (85 patients) and normal left ventricular diastolic function (84 patients). Results: Tend-P and Tend-Q intervals are independent factors associated with left ventricular diastolic dysfunction (p < 0.05). Diagnosis of left ventricular diastolic dysfunction with Tend-P interval at cut off value < 275 ms with sensitivity 69.4%, specificity 70.2%, AUC 0.7; with Tend-Q interval at cut off value < 442 ms with sensitivity 64.7%, specificity 67.9%, AUC 0.66. When combined with other factors, the diagnostic perfomance of left ventricular diastolic dysfunction of the Tend-P/ index (PQ x age) < 0.0282 has a sensitivity of 85.9%, a specificity of 76,2%, AUC 0.81 and Tend-Q/(PQx age) <0.0443 have sensitivity 84.7%, specificity 76.2%, AUC 0.8. Conclusions: The two indexes Tend-P/ (PQ x age) and Tend-Q/ (PQ x age) demonstrates a high perfomance for the diagnosis of left ventricular diastolic dysfunction.