Heart failure and anemia: Effects on prognostic variables.

Area of Science:

• Cardiology
• Pulmonology
• Internal Medicine

Background:

• Anemia is common in heart failure (HF) and linked to increased mortality.
• The prognostic value of standard HF parameters in anemic patients remains unclear.

Purpose of the Study:

• To evaluate the predictive capability of established heart failure prognostic markers in patients with anemia.
• To assess the safety and utility of cardiopulmonary-exercise-testing (CPET) in anemic HF patients.

Main Methods:

• Analysis of clinical, laboratory, echocardiographic, and CPET data from 3913 HF patients.
• Patients were stratified into groups based on hemoglobin (Hb) levels: very low (<11g/dL), low (11-13g/dL), normal (12-15g/dL), and high (>15g/dL).

Main Results:

• Hemoglobin levels significantly impact HF prognosis (HR=0.864).
• Peak oxygen consumption (Peak VO2) and left ventricular ejection fraction (LVEF) independently predict prognosis across all Hb groups.
• The ventilatory efficiency (VE/VCO2 slope) predicts poor prognosis only in patients with low to normal Hb levels.

Conclusions:

• Anemic HF patients exhibit a poorer prognosis, yet CPET is safely performed.
• Peak VO2 and LVEF retain prognostic significance in anemic HF patients (Hb <11g/dL).
• A multiparametric approach integrating CPET is recommended for managing HF patients with low Hb.