1.经适当之治疗,而心脏代偿机能未见好转者;或二度好转,症状减轻,近期又再发者,可于妊娠前半期进行中绝术。2.在既往之妊娠分娩时有心脏代偿机能障碍者。3.有二尖瓣狭窄、心肌变性、高度之心肥大患者,可突然发生恶化引起危险者,在早期行中绝术较安全。4.高年(大于35岁者)之经产妇比年轻之初产 1. Proper treatment, and cardiac compensatory function did not improve; or secondary improvement, reduce the symptoms, and recently made again, can be carried out in the first half of pregnancy in admissions. 2. In the past when the childbirth of cardiac decompensation dysfunction. 3. Mitral stenosis, myocardial degeneration, a high degree of heart hypertrophy in patients with sudden deterioration can cause risk in the early line of surgery more secure. 4. Elderly (more than 35 years of age) of the mothers than the young primiparous