<prompt> Most common hea disease associated with pregnancy isMitral stenosisMitral regurgitationPatent ductus aeriosusTetralogy of fallots  <response>: 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 edema55 and arrhthmias 33 Reference: Textbook of Obstetrics; DC.DUTTAS 9th edition; Page no: 260 