This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Medical, surgical and gynaecological illness complicating pregnancy, Subject name: Gynaecology & Obstetrics
Most common hea disease associated with pregnancy is 
Select and explain. 
A. Mitral stenosis, B. Mitral regurgitation, C. Patent ductus aeriosus, D. Tetralogy of fallot's
A: Mitral stenosis
Answer: A: Mitral stenosis 
Explanation: Mitral stenosis is the most common lesion seen in pregnancy, accounting for 90% cases of rheumatic disease The normal mitral valve area is about 4cm2-6cm2 Symptoms appear when stenosis <2.5cm2 Critical or severe stenosis </=1cm2 - have hight rate of Pulmonary edema(55%) and arrhthmias (33%) Reference: Textbook of Obstetrics; DC.DUTTAS 9th edition; Page no: 260