‘P’ mitrale and left atrial enlargement: comparison with echocardiography. | [Pakistan Journal of Physiology • 2009]

Author(s):

1. Waqas Hameed: Department of Physiology, Army Medical College, Rawalpindi, Pakistan

2. Muhammad Shamaun Razi: Bahria University Medial and Dental College, Karachi Campus, Karachi, Pakistan; Department of Physiology, Army Medical College, Rawalpindi, Pakistan

3. Shafqat Ali: Department of Anatomy, Army Medical College, Rawalpindi, Pakistan: Department of Physiology, Army Medical College, Rawalpindi, Pakistan

4. Muhammad Mazhar Hussain: Department of Physiology, Army Medical College, Rawalpindi, Pakistan

5. Muhammad Aslam: Department of Physiology, Shifa College of Medicine, Islamabad, Department of Physiology, Army Medical College, Rawalpindi, Pakistan

6. Sohail Aziz: Department of Cardiology, Armed Forces Institute of Cardiology/National Institute of Heart Diseases, Rawalpindi, Department of Physiology, Army Medical College, Rawalpindi, Pakistan

Abstract:

Background: This study was carried out to determine the sensitivity and specificity of ‘P’ Mitrale in diagnosing left atrial enlargement by comparing it with the Gold Standard of echocardiography. Methods: The study was carried out at the department of Physiology, Army Medical College, Rawalpindi and department of Cardiology at Armed Forces Institute of Cardiology / National Institute of Heart Diseases. 50 clinically diagnosed cases of left atrial enlargement were included in the study. ECG of the patients was recorded and ‘P’ Mitrale observed. This was followed by echocardiography and using 2-D echocardiogram as a guideline M-mode recording was obtained and left atrial size was calculated. Results: ‘P’ Mitrale has a sensitivity of 22.5% and specificity of 100%. The positive and negative predictive value and diagnostic efficacy of the test were also calculated. Conclusion: Sensitivity of ECG is low in detecting left atrial enlargement. However its sensitivity can be increased by combining ‘P’ Terminal Force in lead V1 and P/P-R ratio to ‘P’ Mitrale. ECG is however still recommended as a routine investigation because of its cost effectiveness and easy availability.

Page(s): 24-30

DOI: DOI not available

Published: Journal: Pakistan Journal of Physiology, Volume: 5, Issue: 2, Year: 2009

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