ELECTROCARDIOGRAPHIC FEATURES AND THEIR DIAGNOSTIC VALUE OF LEFT VENTRICULAR DIAGNOSTIC DYSFUNCTION IN THE PATIENT OF CHRONIC CORONARY SYNDROME
Main Article Content
Abstract
Objectives: This study aims to evaluate certain electrocardiographic indices in diagnosing left ventricular diastotic dysfunction in the patient of Chronic coronary syndrome. Subjects and methods: This descriptive prospective cross sectional study was conducted from August 2022 to June 2023 among 254 patients who were divided into two groups: a group of patients with left ventricular diastolic dysfunction and a group without left ventricular diastolic dysfunction, diagnosed with significant coronary microvascular syndrome (stenosis ≥ 50%) on transdermal coronary angiography and underwent echocardiography at the Vietnam Heart Institute. Results: The diagnosis of left ventricular diastolic dysfunction using the PTF-V1 threshold with a threshold of >3.5 mV.ms had a sensitivity of 83.3%, specificity of 68.0%, and AUC of 0.76; using the Tend-P threshold of <=280 ms had a sensitivity of 79.3%, specificity of 63.5%, and AUC of 0.754; using the Tend-Q threshold of <=360 ms had a sensitivity of 64.8%, specificity of 80.0%, and AUC of 0.792; when combined with other factors, the diagnostic value of left ventricular diastolic dysfunction using the Tend-Q/ (PQ x age) index with a threshold of <=0.03 had a sensitivity of 75.9% and specificity of 72.0%, with an AUC of 0.782. Conclusions: On the electrocardiogram, the Tend-Q (ms) index and the Tend-Q/ (PQ x age) index are shown to be the most valuable indices in predicting the presence of left ventricular diastolic dysfunction.
Article Details
Keywords
Chronic coronary syndrome; Tend-Q interval, Tend-Q/ (PQ x age) index.
References
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