[Fetal development and fetal heart function analyzed by M-mode echocardiography].
Real time-directed M-mode echocardiograms were obtained for 215 echographically evaluated AFD fetuses between 24 and 41 weeks of gestation to assess the cardiac function of normally growing human fetuses. The results are as follows. 1. A significant linear correlation exists between gestational weeks and end-diastolic wall thickening of RV, IVS and LV, respectively (RVAWTd, IVSTd and LVPWTd). 2. There is no significant difference among three (RVAWTd, IVSTd and LVPWTd) at any time from 24 to 41 weeks. 3. Percent systolic wall thickening for RV, IVS and LV are 39 +/- 24, 68 +/- 37 and 41 +/- 16(%), respectively. 4. Motion of IVS towards left ventricular free wall during systole, no septal motion or paradoxical movement (systolic septal anterior motion) is seen in 62, 35 and 3% of cases, respectively. 5. Paradoxical movement of IVS is seen in the case in which the RV/LV wall exclusion ratio is extremely low.
Kamoi
S
S
Department of Obstetrics and Gynecology, Nippon Medical School, Tokyo.
D004452:Echocardiography; D005314:Embryonic and Fetal Development; D005260:Female; D005318:Fetal Heart / Q000502:physiology*; D005865:Gestational Age; D006801:Humans; D009200:Myocardial Contraction; D011247:Pregnancy