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Journal of Cardiovascular and Thoracic Research
ISSN: 2008-5117      eISSN: 2008-6830  
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Article History
Submitted: 13 Feb 2017
Revised: 11 Mar 2017
Accepted: 11 Mar 2017
First published online: 18 Mar 2017

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J Cardiovasc Thorac Res. 2017;9(1):49-53 doi: 10.15171/jcvtr.2017.07

The association of right coronary artery conus branch size and course with ST segment elevation of right precordial leads and clinical outcome of acute anterior myocardial infarction

Original Article

Samad Ghaffari 1, Mohammadreza Taban Sadeghi 1, Mohammad Hossein Sayyadi 1 *

1 Cardiovascular Research Center, Madani Heart Hospital, Tabriz University of Medicine, Tabriz, Iran

Introduction: Coronary artery disease is the leading cause of death worldwide and electrocardiogram (ECG) is a reliable diagnostic tool to determine a myocardial infarction. The present study tried to compare the relationship between the ECG findings and angiographic findings in patients with acute anterior myocardial infarction.
Seventy-four patients with acute anterior ST elevation myocardial infarction (Ant- STEMI) presenting to the emergency room in the first 12 hours after the onset of symptoms were studied. Upon admission, a full 14-lead ECG (including leads V3R and V4R) were performed. Angiographic and ECG findings, as well as clinical outcome were compared between two groups. The statistical tests including Chi-square and independent t-test were used for data analysis.
Results: Small conus branch was seen in 52 (70.3%) and large conus in 22 ( 29.7%) patients. STE in right-sided leads and heart failure were significantly higher in small conus branch group versus large conus branch (88.6% vs 11.4%, P < 0.001 and 34.6% vs 9.1%, P = 0.02 respectively). There was no significant difference in mortality rate between the two groups (5.8% in small conous group vs 0% in large conus group, P = 0.55). There was a significant difference in major adverse cardiac events (MACE) between the two groups (51.9% in small conous group vs 18.2% in large conus group, P = 0.01).
Conclusion: In patients with anterior MI, small conus branch was associated with higher rate of major adverse cardiac events mostly because of increased rate of acute heart failure.

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