الفهرس 
Value of Electrocardiogram P wave peak time , R wave peak time and Fragmented QRS complex in predicting severity of coronary artery disease in Non ST segment elevation / Unstable angina Acute Coronary syndrome
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Abstract
Early diagnosis of non-ST elevation acute coronary syndrome (NSTE-ACS) and prediction of the severity of current coronary artery disease (CAD) play a major role in patient prognosis. Electrocardiography has a unique value in the diagnosis and provides prognostic information on patients with NSTE-ACS. In the present study, we aimed to examine the value of P wave Peak Time (Pwpt) R wave Peak Time, (Rwpt) and Fragmented QRS Complex (F-QRS) in predicting severity of CAD in Non-ST segment elevation ACS, NSTEMI / UA
Methods: A total of 150 consecutive patients (male: 73.3%; mean age: 56.26 ± 9.11years) who were diagnosed with NSTE-ACS were evaluated prospectively. Gensini scores (GSs) were used to define the angiographic characteristics of the coronary atherosclerotic lesions. The patients were divided into two groups according to the angiographic findings. The Pwpt was defined as the duration between the beginning and the peak of the P wave, and Rwpt was defined as the duration between the beginning of the QRS complex and the peak of the R wave and F-QRS was defined as defined as various RSR’ patterns (≥1 R’ or notching of S wave or R wave) with or without Q waves lacking a typical bundle-branch block in 2 contiguous leads
Results: There was statistically significant differences between Gensini score (sever (≥ 25)vs non severe(<25)) regarding Pw peak time, Rw peak time and F QRS complex as higher values were found in severe cases, There was a statistically significant impact of :Pw peak time, Rw peak time and F -QRS complex in detection of cases as; for Pw peak time at cutoff value 37.35(ms), the Area Under the Curve was 0.919 with Sensitivity 87.5% and specificity of 100%, for Rw peak time at cutoff value 30.85(ms), the Area Under the Curve was 0.782 with sensitivity 55.8% and specificity of 93.3%.,
Conclusion: The present study found ECG parameters; P wave peak time, R wave Peak time, fragmented QRS complex and QRS complex duration were all effective in predicting the severity of coronary artery disease in Non-ST-Segment Elevation / Unstable Angina Acute Coronary Syndrome