Normal value of right ventricular outflow tract?

summary

Pulmonary atresia with intact ventricular septum refers to congenital heart malformation with complete atresia of pulmonary valve, abnormal structure and function of tricuspid valve, dysplasia of right ventricle in different degrees, intact ventricular septum, and normal relationship between atrioventricular and ventricular blood vessels. The incidence of pulmonary atresia is about 1% - 3% of congenital heart disease, and about 30% of neonatal congenital cyanotic heart disease. Normal value of right ventricular outflow tract? Let's talk about it

Normal value of right ventricular outflow tract?

The most common clinical symptoms of tetralogy are cyanosis and blood hypoxia. The time and severity of clinical symptoms depend on the degree of right ventricular outflow tract obstruction and pulmonary blood flow. In the short term after birth, because the ductus arteriosus is not closed, the blood flow of pulmonary circulation can come from the patent ductus arteriosus, so cyanosis is often not present clinically.

Cyanosis began to appear in most cases after the closure of ductus arteriosus several weeks or months after birth, and gradually worsened. But if the degree of right ventricular outflow tract obstruction is serious, such as pulmonary atresia, diffuse dysplasia of outflow tract, and multiple severe stenosis of infundibulum, pulmonary valve ring and pulmonary valve, cyanosis will appear after birth.

Cyanosis is mild in patients with mild right ventricular outflow tract obstruction and low right to left blood flow. Cyanosis may not be present if left to right blood flow is dominant at the ventricular level. Eating, crying, cyanosis aggravation during activities, and dyspnea.

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Low cardiac output syndrome is the most common complication. The time of cardiopulmonary bypass should be extended to 1 / 2 of the blocking time. Dopamine or dobutamine was given intravenously and sodium nitroprusside was given intravenously.