Clinical safety note: This tool is for clinical decision support and documentation only. It does not replace specialist cardio-obstetric assessment. Validate all scoring criteria locally before clinical use.

Patient inputs

Shared clinical predictors

These fields are used by both CARPREG I and ZAHARA when applicable.

History of arrhythmia Scores CARPREG I under prior cardiac event/arrhythmia and ZAHARA history of arrhythmia. Left heart obstruction Scores CARPREG I and ZAHARA. Example: mitral valve area <2.0 cm², aortic valve area <1.5 cm², or peak LVOT gradient >30 mmHg. Cyanosis Scores CARPREG I as NYHA III/IV or cyanosis and ZAHARA as cyanotic heart disease. NYHA class III or IV Scores CARPREG I as NYHA III/IV and ZAHARA as NYHA class > II before pregnancy.

CARPREG I-only predictors Prior cardiac event other than arrhythmia Heart failure, TIA/stroke, or another prior cardiac event. Reduced systemic ventricular systolic function Typically EF <40%.

ZAHARA-only predictors

ZAHARA was developed for congenital heart disease populations.

Cardiac medication before pregnancy (1.5) Moderate/severe systemic atrioventricular valve regurgitation (0.75) Moderate/severe pulmonary atrioventricular valve regurgitation (0.75) Mechanical valve prosthesis (4.25)

Modified WHO classification Select the best-fitting condition/category

mWHO details will appear here. Select a category above or from the dropdown to see diagnosis examples and risk interpretation.

Because mWHO is lesion-based, this form intentionally asks the clinician to choose the category rather than auto-classifying from incomplete data.

Optional documentation Patient label / MRN / initials

Results

Summary

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