Abstract
A high prevalence of heavy menstrual bleeding (HMB) has been reported in women with Fontan circulation. Cyanosis has been reported to contribute to HMB, and menstruation has been suggested to affect cardiac status in women with congenital heart disease. This study aimed to evaluate the relationship between the amount of menstrual flow and cardiac status in women with Fontan circulation.Twenty women who had undergone the Fontan procedure were prospectively investigated and the amount of their menstrual flow was evaluated using a questionnaire. Participants were divided into two groups-small and large menstrual bleeding groups-and their clinical data, including the results of hematological tests and echocardiographic findings, were evaluated.One (5%) woman showed primary amenorrhea. Eight of the remaining 19 (42%) women were included in the large menstrual bleeding group. Women with large menstrual bleeding showed a significantly higher hematocrit level (47.1% [36.2%-50.3%] versus 42.1% [35.3%-44.9%], P = 0.006) and longer QRS duration (106 [92-172] ms versus 88 [78-140] ms, P = 0.008), as well as a lower fractional area change (37.4% [35.6%-47.2%] versus 47.0% [38.2%-55.7%], P = 0.010) and global longitudinal strain (-10.5% [-14.9% to -6.6%] versus -13.9% [-20.5% to -7.8%], P = 0.041) of the dominant ventricle on echocardiography, than women with small bleeding.Erythrocytosis, longer QRS duration, and reduced ventricular function were related to increased menstrual bleeding in women with Fontan circulation. These functions may be interrelated with the amount of menstrual flow in such women.
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