Heart Failure by Ejection Fraction (HFimpEF)
Classifies symptomatic heart failure by ejection fraction under the 2021 universal definition.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Symptomatic heart failure present
- Yes
- Current LVEF, percent
- 45
- Baseline LVEF, percent
- 30
Result: HFimpEF
The tool opens with these values already filled in. Replace them with your own.
What the result means
- HFrEF
- Symptomatic heart failure with an ejection fraction of 40 percent or below.
- HFmrEF
- Symptomatic heart failure with an ejection fraction of 41 to 49 percent.
- HFpEF
- Symptomatic heart failure with an ejection fraction of 50 percent or above.
- HFimpEF
- ALL THREE: a baseline at or below 40 percent, a rise of at least 10 points from that baseline, and a current measurement above 40.
- A trajectory, not a threshold
- A baseline of 38 improving to 42 crosses the line but rises only 4 points, so it is HFmrEF. Crossing 40 is not enough on its own.
- One number cannot decide
- The same 45 percent is HFmrEF with no prior measurement and HFimpEF from a baseline of 30. A tool classifying from a single value cannot reach HFimpEF at all.
- Improved is not recovered
- The TRED-HF trial withdrew therapy from patients whose cardiomyopathy had recovered and saw relapse. The improvement describes the ejection fraction, not the disease.
- Symptoms are required
- Every category needs symptomatic heart failure. An ejection fraction on its own classifies nothing.
What you enter
- Symptomatic heart failure present
- Current LVEF, percent
- Baseline LVEF, percent
How this is calculated
Bozkurt B, Coats AJS, Tsutsui H, et al. Universal definition and classification of heart failure: a report of the Heart Failure Society of America, the Heart Failure Association of the ESC and the Japanese Heart Failure Society. Eur J Heart Fail. 2021;23(3):352-380. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.