1. In congenital septal defect, the electrical impulse is blocked from traveling down the septum.
2. Cardiomyopathy may be caused by alcohol abuse, parasites, or viral infection.
3. Congenital septal defects always affect the atria.
4. Myocardial infarction is a heart attack.
5. Tetralogy of Fallot is a combination of three congenital anomalies.