I was diagnosed with high cholesterol and have been eating oats every morning. Does this food help lower blood fat? (Hoang Tran, 55, Thai Nguyen)

Mr. Vu, 57, presented with chest pain and shortness of breath, which worsened with exertion. Doctors diagnosed severe narrowing in all three major coronary arteries.

Mr. Phat, 60 years old, experienced heart valve regurgitation for over 10 years and now suffers from shortness of breath; doctors diagnosed severe heart failure and performed valve repair surgery.

Ms. Lam, 79, experienced cardiogenic shock from acute myocardial infarction with underlying coronary artery damage.

I am healthy but concerned about the increased risk of illness with age, so I want a general cardiovascular check-up for screening. What tests do I need to undergo? (Tran Trung, 61, Lang Son)

Baby Nhien, diagnosed with a congenital heart defect causing cyanosis, underwent two surgeries: a temporary shunt to increase blood oxygen, and a year later, a complete repair of the defect.

I am 52 years old, and recent blood pressure readings show higher numbers than before, despite my lifestyle remaining unchanged. How does blood pressure typically change after age 50, and what should I do? (Thu Ba, TP HCM)

Phong, 49, with aortic valve narrowing due to a congenital defect, received a new-generation biological valve with a 15-year lifespan.

I had myocarditis due to a flu virus infection and have recovered. Will the illness leave any sequelae or recur? How can I prevent it? (Manh Hung, 34 years old)

Every time I watch football, especially during an exciting match or an unexpected goal, I often feel my heart pounding, even a choking sensation in my chest, like my heart "stops". Why does this happen? (Minh Hung, TP HCM)

I have had dyslipidemia for over one year and am taking medication as prescribed by my doctor. Many people advise me not to drink milk because it increases cholesterol, is that correct? (Thanh Ha, 52, Tuyen Quang)

Mui, 54, experienced neck and shoulder pain for one month without relief from medication, leading doctors to diagnose thoracic outlet syndrome (TOS) caused by compressed blood vessels in her neck and shoulder.

Minh, 35, a smoker for nearly 20 years who sleeps about 6 hours daily, experienced headaches and facial flushing, leading to a diagnosis of high blood pressure.

Seventy-three-year-old Tran was hospitalized with severe shortness of breath and heart failure, diagnosed with mitral valve regurgitation due to ruptured heart valve chordae.