Question 1
The medical term for heart attack is
◦ heart murmur.
◦ myocardial infarction.
◦ fibrillation.
◦ heart failure.
◦ heart block.
Question 2
In the condition known as complete heart block, what happens?
◦ Electrical signals from the SA node never reach the ventricles, so the contraction of the atria is not coordinated with the contraction of the ventricles.
◦ Blood flow through the foramen ovale is blocked.
◦ The mitral valve leaflets calcify and close, preventing blood from being pumped efficiently by the left side of the heart.
◦ Coronary arteries are blocked by plaques, preventing blood and oxygen from reaching the myocardial contractile cells.
◦ The fibrous skeleton of the heart breaks down, interfering with the passage of blood from the atria to the ventricles.