Patient Outcomes by Ventricular Systolic and Diastolic Function

Area of Science:

• Cardiology
• Heart Failure Research
• Clinical Outcomes

Background:

• Left ventricular dysfunction encompasses systolic and diastolic parameters, leading to heart failure with reduced or preserved ejection fraction.
• Understanding the distinct and overlapping impacts of systolic and diastolic dysfunction is crucial for patient management.

Purpose of the Study:

• To investigate the influence of left ventricular systolic and diastolic dysfunction on patient mortality and hospitalization events.
• To compare the prognostic implications of diastolic dysfunction grade across different ejection fraction levels.

Main Methods:

• Analysis of two cohorts: Cohort A (EF ≥50%) stratified by diastolic dysfunction grade, and Cohort B (EF <50%) stratified by EF quartiles.
• Longitudinal follow-up for all-cause death, cardiovascular, heart failure, and cardiac arrest hospitalizations.
• Statistical adjustment for comorbidities to assess independent risk associations.

Main Results:

• Increased risk of all-cause mortality and cardiovascular/heart failure hospitalizations correlated with higher diastolic dysfunction grade in preserved EF, and more pronounced with worsening EF.
• Severe (Grade III) diastolic dysfunction presented a cardiac arrest hospitalization risk comparable to ejection fraction <25%.
• Diastolic dysfunction conferred significant risks, particularly for cardiac arrest events, even in patients with preserved ejection fraction.

Conclusions:

• While systolic dysfunction carries a higher risk for overall mortality and heart failure hospitalizations, severe diastolic dysfunction (Grade II/III) poses a comparable risk for cardiac arrest as moderate/severe systolic dysfunction.
• Diastolic dysfunction is an independent predictor of adverse cardiovascular events, including cardiac arrest.
• Further research into targeted treatment strategies for diastolic dysfunction is warranted to improve patient outcomes.