Left ventricular function recovery after ST-elevation myocardial infarction: correlates and outcomes

Area of Science:

• Cardiology
• Clinical Medicine
• Heart Disease Research

Background:

• Limited contemporary data exist on left ventricular function (LVF) recovery post-ST-elevation myocardial infarction (STEMI).
• No prior studies have compared LVF recovery outcomes with patients who had normal baseline LVF.

Purpose of the Study:

• To identify predictors of LVF recovery in STEMI patients.
• To compare outcomes (heart failure hospitalization, mortality) between patients with baseline normal LVF, recovered LVF, and persistently reduced LVF.

Main Methods:

• Patients with STEMI (2010-2016) were grouped by LVF (ejection fraction [EF]) at 3 months: baseline normal (EF ≥ 50%), recovered (EF < 50% to ≥ 50%), and reduced (EF < 50%).
• Outcomes including heart failure hospitalization and mortality were compared across the three groups.

Main Results:

• Of 577 patients, 59% had baseline normal LVF, 19% recovered LVF, and 22% had reduced LVF.
• Higher baseline EF, lower peak troponin, and cardiac arrest were predictors of LVF recovery.
• No outcome difference was observed between recovered LVF and baseline normal LVF groups.
• Persistently reduced LVF was associated with significantly higher risks of heart failure hospitalization (HR 5.00) and all-cause mortality (HR 1.87).

Conclusions:

• Persistently reduced LVF 3 months post-STEMI indicates a significantly worse prognosis.
• LVF recovery in STEMI patients leads to outcomes comparable to those with normal baseline LVF.
• Early identification and management of factors influencing LVF recovery are critical for improving STEMI patient outcomes.