[Doppler echocardiographic assessment of hemodynamic parameters on patients with tetralogy of Fallot].

Continuous Doppler echocardiography was used for the study of hemodynamic parameters on various stages of treatment of 61 children (mean age 12.4 months) with tetralogy of Fallot. Twenty five patients were studied before surgery during spells of cyanosis and hyperpnea. Thirty six patients were treated with systemic - pulmonary arterial anastomosis and in 25 patients total correction was carried out. Doppler echocardiographic study was repeated in 2 weeks and 1 year after surgery. Attack of cyanosis and hyperpnea was associated with reduction of pulmonary blood flow and increase of venoaortic shunting. Comparison of hemodynamic parameters before and after creation of aorta-to-pulmonary artery anastomosis allowed to establish Doppler echocardiographic criteria of assessment of the anastomosis functional state. Repetitive Doppler echocardiographic studies showed that hemodynamic results of total correction depended on the type of repair of right ventricular outflow tract. Severity of pulmonary artery valve insufficiency also depended on the type and extent of surgical intervention.