Validity of Electrocardiographic QT Interval in Predicting Left Ventricular Diastolic Dysfunction in Patients with Suspected Heart Failure. | [Journal of College of Physicians and Surgeons--Pakistan : JCPSP • 2016]

Author(s):

1. Hamid Sharif Khan: Department of Cardiology, Armed Forces Institute of Cardiology (AFIC), Rawalpindi, Pakistan

2. Imran Iftikhar: Department of Cardiology, Armed Forces Institute of Cardiology (AFIC), Rawalpindi, Pakistan

3. Qaiser Khan: Department of Cardiology, Armed Forces Institute of Cardiology (AFIC), Rawalpindi, Pakistan

Abstract:

Objective: To determine the validity of electrocardiographic QT interval in predicting left ventricular diastolic dysfunction in patients with suspected heart failure using echocardiogram as the gold standard. Study Design: Cross-sectional validation study. Place and Duration of Study: AFIC-NIHD, Rawalpindi, from December 2012 to June 2013. Methodology: Patients with suspected heart failure undergoing 12-lead electrocardiogram and echocardiography were inducted. All electrocardiograms were analyzed by a single trained reader unaware of the echocardiographic findings. QTc interval was calculated according to the published guidelines. All patients underwent a complete M mode, 2 dimensional, Doppler, and tissue Doppler echocardiography using aiE33 ultrasound system and diastolic dysfunction was calculated. Results: Three hundred patients were studied. Descriptive statistics of age was 61.42 years ±10.43. Of all the patients 218 patients (72.7%) were male and 82 patients were female (27.3%). Mean QT interval (msec) was 427.29 ±54.69. One hundred and eighty patients (60.0%) had diastolic dysfunction and 120 patients (40%) had no diastolic dysfunction. The sensitivity of electrocardiographic QTc interval in predicting diastolic dysfunction was 71.11% and specificity was 88.11%. Conclusion: Prolonged electrocardiographic QTc interval in patients with suspected heart failure is a useful tool in predicting diastolic dysfunction.

Page(s): 353-356

DOI: DOI not available

Published: Journal: Journal of College of Physicians and Surgeons--Pakistan : JCPSP, Volume: 26, Issue: 5, Year: 2016

Keywords:

Keywords are not available for this article.

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