Simple Risk Score to Predict Survival in Acute Decompensated Heart Failure　- A₂B Score

Area of Science:

• Cardiology
• Internal Medicine
• Clinical Research

Background:

• Prognosis for patients with acute decompensated heart failure (ADHF) remains poor.
• A validated risk stratification tool for ADHF patients post-discharge is currently lacking.
• Improved risk assessment is crucial for optimizing post-discharge care and treatment strategies.

Purpose of the Study:

• To develop and validate a simple risk score for predicting long-term mortality in ADHF patients.
• To identify key clinical parameters at discharge that are independently associated with prognosis.
• To create a user-friendly tool for stratifying ADHF patient risk.

Main Methods:

• Utilized two heart failure cohorts (NARA-HF and JCARE-CARD) for derivation and validation.
• Identified age, hemoglobin (Hb), and brain natriuretic peptide (BNP) at discharge as independent risk factors.
• Developed the A2B score based on categorizations of age, Hb, and BNP levels.

Main Results:

• The A2B score categorizes patients into four risk groups: extremely low, low, medium, and high.
• In the derivation cohort, 2-year survival rates ranged from 97.8% (extremely low risk) to 45.2% (high risk).
• Validation in the JCARE-CARD cohort showed similar survival trends: 95.4% (extremely low risk) to 55.6% (high risk).

Conclusions:

• The A2B score is a practical and effective tool for estimating survival rates in ADHF patients at the time of discharge.
• This score can aid clinicians in identifying high-risk individuals who may benefit from closer monitoring or intensified management.
• The A2B score facilitates personalized risk assessment and supports informed clinical decision-making for ADHF survivors.