Cardiac defects without a shunt

1. Right Heart obstruction

• Pulmonary Stenosis (PS)

Obstructions can occur at various levels in the right side of the heart or in the pulmonary outflow path. Pure obstructions do not result in a mixing of the blood but cause a massive additional strain on the ventricles because they have to pump against increased resistance.

2. Left Heart obstruction

• Aortic Stenosis
• Coarctation

(From: http://www.embryology.ch/anglais/pcardio/patholcardio01.html#rechtsherzobstruktion, http://www.embryology.ch/anglais/pcardio/patholcardio02.html#Linksherzobstuktion)
From:

• Anatomy & Anomalies, Children’s Heart Center, Johns Hopkins University
• Heart Embryology, University of Toronto
• Cardiovascular Embryology, Dept. of Anatomy, Indiana University
• Human Embryoloogy, Organogenesis