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Updated: May 9, 2026
12:03
Myocardial Infarction and Functional Outcome Assessment in Pigs
Published on: April 25, 2014
Patterns of coronary compromise resulting in acute right ventricular ischemic dysfunction
Terry R Bowers1, William W O'Neill, Mark Pica
1Division of Cardiology, William Beaumont Hospital, Royal Oak, Mich 48073-6769, USA.
Circulation
|August 28, 2002
Summary
Proximal right coronary artery (RCA) occlusion often causes right ventricular infarction (RVI). However, preserved RV perfusion through collaterals or patent branches can prevent severe RV dysfunction, highlighting the importance of coronary flow patterns.
Area of Science:
- Cardiology
- Interventional Cardiology
- Myocardial Infarction
Background:
- Acute right ventricular infarction (RVI) severity varies despite proximal right coronary artery (RCA) occlusion.
- Understanding coronary compromise patterns is key to explaining RVI severity.
Purpose of the Study:
- To identify coronary compromise patterns determining the extent of RV ischemic dysfunction.
- To correlate RV perfusion with RV wall motion in acute myocardial infarction.
Main Methods:
- Analyzed 125 patients with acute inferior myocardial infarction undergoing emergency angiography.
- Assessed culprit lesion, RV branch flow (TIMI, frame counts), and calculated RV perfusion indices.
- Correlated RV perfusion indices with RV wall motion using ultrasound.
Main Results:
- RVI occurred in 42% of patients, with proximal RCA occlusion compromising RV branch flow.
- Patients without RVI had preserved RV perfusion (flow index 2.7 vs. 0.7; P=0.001), often due to patent RV branches or collaterals.
- Strong correlation found between RV perfusion and RV wall motion (Spearman r=0.79).
Conclusions:
- Proximal RCA occlusion compromising RV branch perfusion frequently leads to RV dysfunction.
- Collaterals or spontaneous reperfusion can preserve RV function even with proximal RCA culprits.
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