| Term | Definition |
| Pulmonary Artery Stenosis | blood in not fully oxygenated as it passes through the lungs |
| Ventricular Septal Defect | the gap in the septum allows deoxygenated blood to pass through the left ventricle, and then to the aorta |
| Shift of the Aorta to the Right | aorta overrides the intervention of the Interventricular septum, oxygen-poor blood passes even more easily from the right ventricle to the aorta |
| Hypertrophy of the Right Ventricle | myocardium has to work harder to pump blood through a narrowed pulmonary artery |