<prompt> Most common heart disease associated with pregnancy is:Mitral stenosisMitral regurgitationPatent ductus arteriosusTatralogy of Fallot  <response>: Ans. is a, i.e. Mitral stenosisRef. Dutta Obs. 7e, p 275; Fernando Arias 3e, p 522In developing countries like India:Most common heart disease in pregnancy is of rheumatic origin, followed by the congenital heart disease.Most common rheumatic valvular lesion is mitral stenosis in 80 followed by mitral regurgitation and aortic stenosis.In developed countries:Most common heart disease is congenital heart disease QMost common lesion is Atrial septal defect Q 