Pulmanary flow is decreased | PGI May 2017 Preparations MCQ

Pulmanary flow is decreased in 

A. Fallot’s tetralogy 
B. Ebstein’s anomaly 
C. Common atria 
D. TGV with intact septum 
E. Postoperative TGV correction

Ans. A. Fallot’s tetralogy ; (B) Ebstein’s anomaly.

• The route of blood flow in complete Transposition of great vessels (TGA) results in two separate circulation and survival depends on mixing that occur at a trial, ventricular or great vessel level. In TGA with intact septum, mixing occurs through foramen ovale and being small, the mixing is poor. Pulmonary plethora is seen. 

• In corrected TGA, route of blood flow is normal. Haemodynamics depend on associated anomalies.

• Normal or Decreased pulmonary blood flow with cyanosis is seen in

- Tricuspid atresia 

- Ebstein’s anomaly with atrial shunt 

- Pulmonary atresia with intact ventricular septum

- Pulmonic stenosis or atresia with VSD 

- Pulmonic stenosis with right to left atrial shunt

- Complete TGA with pulmonic stenosis 

- Double — out left ventricle with pulmonic stenosis 

- Single ventricle with pulmonic stenosis 

- Pulmonary AV fistula 

- Vena cava to Lt atrial communication. 

• Pulmonary blood flow increased in common artria.