Pulmonary artery acceleration time (PAAT)
Quick PAAT interpretation + optional rough mPAP estimate (use with caution).
Inputs
Measurement tip: PAAT is often measured in the RVOT pulsed Doppler envelope (time from onset to peak velocity).
Results
PAAT
Longer is usually better
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Estimated mPAP
Approx: 79 − 0.45×PAAT (ms)
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Interpretation
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Enter PA acceleration time (ms).
Note: PAAT-based mPAP formulas are approximations and can vary by population and technique. Confirm with TR-derived estimates and full right heart assessment.