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ZAHARA II Risk Calculator

  • Maternal Age (years)
  • Prior Cardiac Event (yes=1, no=0)
  • NYHA Class >II (yes=1, no=0)
  • Left Heart Obstruction (yes=1, no=0)
  • Left Ventricular Dysfunction (yes=1, no=0)
  • Mechanical Valve (yes=1, no=0)
  • ZAHARA II Risk Model: Explanation and Clinical Context
    The ZAHARA II Risk Score is a validated tool to estimate maternal cardiac risk during pregnancy for women with known heart disease.
    It incorporates key clinical variables including maternal age, prior cardiac events, NYHA functional class, presence of left heart obstruction, left ventricular dysfunction, and mechanical heart valve.
    The score produces an individualized percentage risk of experiencing a major cardiac event during pregnancy.
    This model aids clinicians in prenatal counseling, risk stratification, and planning monitoring intensity and delivery strategy.

    Reference:
    Siu SC, et al. "Risk and predictors for maternal cardiac complications in women with heart disease during pregnancy: the ZAHARA II study." Circulation. 2010;121:179-186. doi:10.1161/CIRCULATIONAHA.109.879171

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