Diastolic heart failure or heart failure with a normal ejection fraction

Area of Science:

• Cardiology
• Heart Failure Research

Background:

• Nearly 50% of heart failure patients present with normal left ventricular ejection fraction (LVEF).
• These patients are variably termed diastolic heart failure, heart failure with preserved LVEF, or HFNEF.
• Recent evidence suggests subtle systolic dysfunction in HFNEF, making it a more accurate descriptor.

Purpose of the Study:

• To clarify the pathophysiology of heart failure with normal ejection fraction (HFNEF).
• To differentiate HFNEF from heart failure with reduced ejection fraction (HFREF).
• To propose a more rational classification system for heart failure.

Main Methods:

• Review of existing literature on heart failure pathophysiology.
• Comparison of clinical characteristics and outcomes between HFNEF and HFREF.
• Analysis of ventricular remodeling and etiological factors.

Main Results:

• HFNEF is more prevalent in elderly females and has mortality rates comparable to HFREF.
• Pathophysiology is debated, likely involving a mix of systolic and diastolic dysfunction, not isolated diastolic abnormalities.
• HFREF is characterized by significant ventricular remodeling and increased volumes, often post-myocardial infarction.
• HFNEF typically involves slower remodeling, frequently linked to hypertension.

Conclusions:

• HFNEF is a distinct clinical entity, often presenting with mixed systolic and diastolic dysfunction.
• Ventricular volumes, rather than ejection fraction alone, offer a more rational basis for classifying heart failure patients.
• Understanding the nuances of HFNEF is crucial for accurate diagnosis and management.