Due Diligence of a Diastolic Index as a Prognostic Factor in Heart Failure with Preserved Ejection Fraction

Area of Science:

• Cardiology
• Cardiovascular Physiology
• Echocardiography

Background:

• Existing non-invasive diastolic indices for heart failure with preserved ejection fraction (HFpEF) do not account for arterial load.
• Accurate prognostic assessment in HFpEF patients is crucial due to heterogeneous cardiac structure and function.

Purpose of the Study:

• To evaluate a novel vascular resistance-integrated diastolic function index for determining the diastolic prognostic index in elderly, real-world HFpEF patients in Japan.
• To investigate the prognostic value of the Ed/Ea ratio, considering factors like clinical endpoint, follow-up duration, and sex.

Main Methods:

• Development of a novel index: Ed/Ea = (E/e')/(0.9 × systolic blood pressure), representing the ratio of left ventricular diastolic elastance (Ed) to arterial elastance (Ea).
• Application of this index in a cohort of elderly, real-world patients with HFpEF in Japan.
• Analysis of serial echocardiographic diastolic indices for prognostic assessment.

Main Results:

• The novel Ed/Ea index integrates arterial load into diastolic function assessment, offering a more comprehensive view than traditional indices.
• The prognostic significance of hemodynamic factors like Ed/Ea may vary based on clinical endpoint, follow-up duration, and sex.
• Serial echocardiographic assessment using this index can provide an accurate prognosis in heterogeneous HFpEF populations.

Conclusions:

• The novel Ed/Ea index provides a more refined assessment of diastolic function in HFpEF by incorporating arterial load.
• This approach holds promise for improving prognostic accuracy in clinical practice for HFpEF patients.
• Further research is warranted to explore the differential impact of Ed/Ea across various clinical scenarios and patient demographics.