Diastolic Dysfunction and Survival in Patients With Preserved or Mildly Reduced Left Ventricular Ejection Fraction...

Area of Science:

• Cardiology
• Echocardiography
• Clinical Outcomes

Background:

• Left ventricular ejection fraction (LVEF) is a poor prognostic indicator in myocardial infarction (MI) patients with preserved or mildly reduced LVEF (>40%).
• Guideline-based assessment of diastolic dysfunction (DD) may offer improved prognostic value in this patient subgroup.

Purpose of the Study:

• To evaluate the predictive value of guideline-based diastolic dysfunction (DD) assessment for long-term mortality.
• To determine if DD reclassifies prognosis in MI patients with preserved or mildly reduced LVEF (>40%).

Main Methods:

• Retrospective analysis of 2,234 patients with first-ever MI and LVEF >40%.
• Data collected included clinical, angiographic, and echocardiographic parameters.
• Significant DD defined as grade 2 and 3 DD, assessed early postadmission.

Main Results:

• 14.1% of patients had significant DD.
• At median 4.5-year follow-up, significant DD independently predicted all-cause mortality (HR=2.01) and cardiac mortality (HR=3.97).
• Multivariable analyses and statistical validation confirmed DD's independent association with outcomes.

Conclusions:

• Significant diastolic dysfunction is an independent predictor of mortality post-MI in patients with preserved or mildly reduced LVEF.
• DD effectively reclassifies prognosis in patients where LVEF is otherwise indiscriminate.
• Further research on the clinical implications and treatment strategies for DD in this cohort is warranted.