[Arrhythmias in pregnancy: etiology and perinatal outcomes].

We analysed 132 case forms of pregnant women who delivered in a special maternity hospital for patients with cardiovascular diseases. Complex disorders of heart rhythm (paroxysmal supraventricular tachycardia, atrial fibrillation, frequent ventricular extrasystoles, and II - III degree atrioventricular block) were revealed in 64 (48.5%) of women. Etiological factors of these arrhythmias and blocks in 50% of cases were organic and functional derangements of cardiovascular system. In other 50% of cases causes of heart rhythm disorders were not established and they were classified as idiopathic. Perinatal outcomes in women with arrhythmias and blocks were worse than in women without this pathology. They appeared as intrauterine retardation of fetus development and various derangements of central nervous system in newborns.