Low-flow low-gradient aortic stenosis (helper)

Uses AVA, mean gradient, SVI, and LVEF to sort common LFLG patterns.

Inputs

Aortic valve area (AVA)

cm²

Mean gradient

mmHg

LVEF

Stroke volume (choose one method)

Stroke volume

Or compute SV from LVOT:

LVOT diameter

LVOT VTI

Indexing (BSA for SVI)

Height

Weight

Results

AVA

Used for pattern check (≤ 1.0 cm²)

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Mean gradient

Used for pattern check (< 40 mmHg)

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LVEF

Reduced EF often < 50%

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Stroke volume

Manual SV preferred if available

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BSA

Mosteller

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SVI

Low-flow commonly < 35 mL/m²

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Classification

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Enter AVA, mean gradient, SVI, and LVEF to classify.

Reminder: This is a pattern helper only. Confirm measurement quality (LVOT, Doppler alignment), BP, rhythm, and consider additional testing (DSE/CT calcium) per guideline workflows.