Area of the mitral valve in severe mitral stenosis during pregnancy: (A) 4-6 cm2, (B) 1-1.5 cm2, (C) 1.5-2.5 cm2, (D) 0.8-1 cm2
Answer is B. Normal area of the mitral valve is 4-6cm2
Severe mitral stenosis is less than 1.5cm2
Critical area is less than 1cm2