Problem
i. Mitral regurgitation is caused by the flaps of the mitral valve not closing properly. What type of problems do you see this creating? (Think about the function of valves.) Can this be serious? Would it be more or less serious if a person were experiencing tricuspid regurgitation? Why or why not?
ii. The left coronary artery usually divides into two branches, known as the left anterior descending (LAD) and the circumflex (Cx) coronary arteries. The left anterior descending artery is nicknamed the "widow maker". Provide justification for such a harsh nickname.