Study and evaluation of the functional state of the maternal and fetal circulatory systems at the time of delivery in patients with mitral stenosis

---It is established that the severity of functional disturbances in the maternal and fetal circulatory systems is directly related to the degree of mitral stenosis (MS) and terms of gestation. 76 women aged 18-28 years old with MS of different severity were examined at gestational periods from 12-14 to 36-38 weeks. Depending on the degree of MS all patients were divided into IV groups. We used A. N. Okorokov's classification. N Okorokov's classification was used. We distinguished "insignificant" MS with the area of 2.9 cm2, "moderately expressed" (2.9-2.0 cm2), "expressed" (1.9-1.1 cm2), and "critical" MS. (1cm2). The studies were performed immediately before the presumed termination of pregnancy. The main parameters of hemodynamics and uterine-placental-foetal blood flow were studied. The most expressed disorders, dangerous in terms of hemodynamic catastrophes, were registered in women with "severe" and "critical" MI, which were formed by 32-34 (III g) and by 12-14 (IV g) weeks of gestation, respectively. Minimal abnormalities occurred in patients with "negligible" and "moderately expressed" MS at gestational terms of 36-38 and 34-36 weeks, respectively