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[Right ventricular function during the convalescence phase of posterior primary infarction]
Archives Des Maladies Du Coeur Et Des Vaisseaux
|March 1, 1985
Summary
Inferior myocardial infarction with right ventricular extension can impair long-term right ventricular systolic function, even after initial hemodynamic recovery. This study highlights persistent deficits in ejection fraction and increased end-systolic volume in affected patients.
Area of Science:
- Cardiology
- Cardiovascular Physiology
- Myocardial Infarction Research
Context:
- Right ventricular (RV) involvement is frequent in inferior myocardial infarction (MI).
- Initial hemodynamic compromise from RV extension is well-documented.
- Long-term functional consequences of RV extension in MI require further investigation.
Purpose:
- To prospectively assess regional and global RV function months after acute inferior MI with and without RV extension.
- To compare RV systolic function between patients with and without RV extension post-MI.
Summary:
- 32 patients with (n=14) or without (n=18) RV extension during inferior MI underwent cardiac catheterization 2.9 months post-MI.
- Patients with prior RV extension showed normal hemodynamics but persistent RV systolic dysfunction (increased RV end-systolic volume, decreased RV ejection fraction) compared to controls.
- Right coronary artery lesions were common in the RV extension group, correlating with inferior wall hypokinesis/akinesis.
Impact:
- Identifies persistent RV systolic dysfunction as a significant long-term consequence of RV extension in inferior MI.
- Suggests that RV function deficits may persist beyond the acute phase, impacting overall cardiac health.
- Provides evidence for potential long-term monitoring and therapeutic strategies for patients with RV involvement post-MI.