Considering high maternal deaths, absolute indications for termination of pregnancy are; Primary pulmonary hypeension Eisenmenger's syndrome Pulmonary veno-occlusive disease Relative indications are; Grade I or II with previous history of cardiac failure in early months or in between pregnancy Parous women with grade III and IV cardiac lesions Ref: Textbook of Obstetrics by DC Dutta, 6th edition, Page 279.