Questions about example sentences with, and the definition and usage of "Valvular"

A: × Valvular heart disease is a malfunction of heart valve and leaded heart problem.
✓ Valvular heart disease is the malfunctioning of heart valve, which leads to heart problem.

× We have four valves in our heart, but most of valvular heart disease occurs in mitral valve and aortic valve.
✓ We have four valves in our heart, but most of the valvular heart disease occurs in mitral valve and aortic valve.

× The valve problem is divided into two types; stenosis (the valve cannot open properly and disturb blood flow) and regurgitation (the valve cannot close properly and blood flow regurgitate).
✓ The valve problem is divided into two types; stenosis (improper opening of the valve which disturb blood flow) and regurgitation (improper closing of the valve leading to blood regurgitate).

× Since the two valves can have both two problems, there are four types of valvular heart diseases.
✓ Since the two valves can have both problems, there are four types of valvular heart diseases.

× Treatment for the valvular heart disease is a valve replacement.
✓ The treatment for the valvular heart disease is a valve replacement.