[The postinfarct prognostic value of right ventricular systolic function]

Area of Science:

• Cardiology
• Cardiac Imaging
• Prognostic Studies

Background:

• Right ventricular (RV) involvement in inferior myocardial infarction (MI) is linked to acute prognosis.
• The long-term prognostic value of RV dysfunction after MI remains unclear.

Purpose of the Study:

• To determine if RV ejection fraction (RVEF) predicts long-term complications in acute myocardial infarction (MI) patients.
• To assess the prognostic relevance of RV and left ventricular (LV) function over a 5-year follow-up period.

Main Methods:

• Ninety-eight patients with uncomplicated acute MI underwent radionuclide ventriculography for RV and LV ejection fraction assessment.
• Clinical follow-up was conducted for at least 5 years to track complications.
• Univariate and multivariate analyses were used to evaluate prognostic factors.

Main Results:

• While univariate analysis showed lower resting RVEF in inferior MI patients with early severe complications, this was not significant at 5 years.
• Multivariate analysis identified resting left ventricular ejection fraction (LVEF) as the only independent predictor of 5-year complications (OR 5.93).
• RV and LV ejection fraction during exercise did not alter these findings.

Conclusions:

• Resting RVEF is not an independent predictor of long-term complications in uncomplicated acute MI.
• LVEF is the primary predictor of 5-year complications in both anterior and inferior MI patients.
• RVEF measurement does not add significant prognostic information beyond LVEF in this patient group.