Most common hea disease associated with pregnancy is

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