Module 1: Heart Failure Classification
Classify heart failure by stage (A-D) and LVEF phenotype (HFrEF, HFmrEF, HFpEF) according to the 2022 AHA/ACC/HFSA guideline. Includes NYHA functional class assessment.
From most recent echocardiogram
For detecting HFimpEF
HF Classification by LVEF — 2022 AHA/ACC/HFSA Guideline, Table 1
| Phenotype | LVEF | Description |
|---|---|---|
| HFrEF | ≤40% | Reduced ejection fraction |
| HFmrEF | 41-49% | Mildly reduced ejection fraction |
| HFpEF | ≥50% | Preserved ejection fraction |
| HFimpEF | Previously ≤40%, now >40% | Improved ejection fraction |
Source: Heidenreich PA, et al. 2022 AHA/ACC/HFSA Guideline for the Management of Heart Failure.
IMPORTANT: This software is clinical decision support (CDS) intended for use by licensed healthcare professionals under Section 520(o)(1)(E) of the Federal Food, Drug, and Cosmetic Act. It is not intended as a medical device. All recommendations are derived from the 2022 AHA/ACC/HFSA Guideline for the Management of Heart Failure and must be independently verified by the treating clinician before any clinical action. AI-generated content (including extracted data and clinical notes) is produced by large language models and may contain errors, omissions, or hallucinations — clinician review is mandatory. Patient data entered into the calculator is processed entirely in the browser; AI features process data server-side under a signed HIPAA Business Associate Agreement with no data retention. AI-HEART Lab, its affiliates, and contributors assume no liability for clinical decisions made using this tool. By using this tool, you acknowledge these limitations and accept full responsibility for clinical decisions.