Aortic Stenosis

There are three different localizations of aortic stenoses:

  1. Supravalvular
  2. Valvular
  3. Subvalvular (left ventricular outflow tract) through fibrous or muscular constriction below the aortic valve

In critical aortic stenosis left heart failure occurs very soon after birth. The cardiac pulse is typically very soft because the cardiac ejection/volume is critically reduced. The pulse in the extremities is hardly discernable.

EKG: Left heart hypertrophy (LVH). ECHO.

In critical aortic stenosis the ductus arteriosus must by all means be kept open after birth. This is successfully achieved with an infusion of prostaglandin E. As in the fetal period, the right ventricle then supplies the lower half of the body with blood Balloon dilatation is a corrective therapeutic measure as well as commissurotomy, if a valvular stenosis is present.


Pulmonary stenosis (PS)

Posted on January 23, 2011 - 9:49pm

Isolated PS occurs with a frequency of 9% of all congenital cardiac abnormalities and, combined with other cardiac abnormalities, with a frequency of nearly 21%.

All forms lead to an obstruction of blood flow from the right ventricle to the pulmonary arteries. Depending on how severe the stenosis is a compensatory hypertrophy of the right ventricle developes.

  1. Subvalvular (Right ventricular outflow tract)
  2. Valvular
  3. Supravalvular (pulmonary truncus)
  4. Peripheral (at the bifurcation)
  5. Peripheral in the pulmonary artery


Aortic Stenosis

There are three different localizations of aortic stenoses:


1. Preductal Coarctation

The stenosis is proximal to the inlet of the ductus arteriosus and the lower half of the body receives only venous blood from the pulmonary circulation system. If the duct closes off, life-threatening LV failure may occur.