Nurse caring a high risk pregnant lady with heart disease, must know which one of the following valvular lesions cause death during labor?

Correct option is C

Mitral stenosis is the most dangerous valvular lesion in pregnancy and labor due to increased blood volume and cardiac output. These changes worsen the obstruction at the mitral valve, leading to pulmonary edema, atrial fibrillation, and even sudden death during labor.
Explanation of each option: • (a) Aortic stenosis – Though it carries some risk, especially if severe, most women with mild to moderate aortic stenosis tolerate pregnancy reasonably well. • (b) Aortic regurgitation – The decreased systemic vascular resistance during pregnancy can actually improve symptoms in many women with aortic regurgitation. • (c) Mitral stenosis – Correct. It is the most hazardous lesion in pregnancy, particularly during labor due to increased preload, which can cause pulmonary congestion and cardiac decompensation. • (d) Mitral regurgitation – Regurgitant lesions are better tolerated than stenotic ones during pregnancy due to reduced afterload.