ACCURACY OF 12 LEAD ECG FOR DIAGNOSIS OF POSTERIOR MYOCARDIAL INFARCTION | [Journal of Postgraduate Medical Institute • 2014]

Author(s):

1. Iqtidarul Din: Department of Cardiology,Lady Reading Hospital Peshawar, Pakistan.

2. Muhammad Adil: Department of Cardiology,Lady Reading Hospital Peshawar, Pakistan.

3. Hameedullah: Department of Cardiology,Lady Reading Hospital Peshawar, Pakistan.

4. Mohammad Faheem: Department of Cardiology,Lady Reading Hospital Peshawar, Pakistan

5. Farhat Abbas Shah: Department of Cardiology,Lady Reading Hospital Peshawar, Pakistan.

6. Mohammad Hafizullah: Department of Cardiology,Lady Reading Hospital Peshawar, Pakistan.

Abstract:

To determine the accuracy of 12 lead ECG for diagnosis of acute Posterior Myocardial Infarction (MI) after its confirmation by 15 leads ECG. Methodology: This study was conducted in Cardiology Department, Lady Reading Hospital Peshawar from January to July, 2012. Patients presenting to CCU with typical chest pain, pain epigastrium, sweating, nausea or vomiting and with admitting diagnosis of acute coronary syndrome (ACS) were included. The diagnostic criteria for posterior MI on 12 leads ECG was when R:S was more than 1:1 in V2 or there was tall R wave in V1 or V2 (more than S in the same leads) or more than 2mm ST segment depression in anterior lead. Posterior MI was confirmed on 15 leads ECG taking it as a standard when ST segment elevation of >1mm was present in C7,8,9. Results: Out of 176 randomly selected patients, 90(51.1%) were male and 86(48.9%) female; with mean age of 63 years. Out of these, 70 were in the age range of 51 to 60 years and 40 each in 41-50 and 61-70 years. Eighteen patients had changes of posterior MI on 12 leads ECG and amongst them 10 patients had true posterior MI on 15 leads ECG. We had 8 false positive cases on 12 leads ECG with no false negative cases after confirmation with 15 leads. Conclusion: The accuracy of 12 leads ECG for detection of posterior MI was 55% after confirmation with 15 leads and there was no age and gender difference in its accuracy.

Page(s): 145-148

DOI: DOI not available

Published: Journal: Journal of Postgraduate Medical Institute, Volume: 28, Issue: 2, Year: 2014

Keywords:

Myocardial infarction MI , 12 leads ECG , 15 leads ECG

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