Possible answer:

Heart attack is a medical emergency that occurs when blood flow to part of the heart muscle is blocked, usually by a blood clot that forms in a coronary artery. The lack of oxygen and nutrients can damage or kill heart cells, leading to chest pain, shortness of breath, nausea, sweating, and other symptoms. Several factors can increase the risk of a heart attack, including high blood pressure, smoking, obesity, stress, and a family history of heart disease. However, the primary cause of a heart attack is usually related to the buildup of fatty deposits (plaques) in the arteries that supply blood to the heart, a condition called atherosclerosis. These plaques can rupture, causing a blood clot to form and block the artery, or they can gradually narrow the artery and reduce blood flow over time.

Blood Sugar and Heart Attack

While high blood sugar levels (hyperglycemia) can damage blood vessels and increase the risk of cardiovascular disease, including heart attack and stroke, they do not directly cause a heart attack. However, people with diabetes or prediabetes are more likely to have other risk factors for heart disease, such as high blood pressure, abnormal cholesterol levels, and obesity, which can contribute to a heart attack. Uncontrolled diabetes can also damage the nerves that control the heart and blood vessels, making them less responsive to changes in blood pressure and oxygen demand.

Cholesterol and Heart Attack

Cholesterol is a waxy substance that is essential for many functions in the body, but can also accumulate in the arteries and form plaques. There are two main types of cholesterol: low-density lipoprotein (LDL) and high-density lipoprotein (HDL). LDL is often called "bad" cholesterol because it can contribute to atherosclerosis, while HDL is often called "good" cholesterol because it can help remove excess cholesterol from the blood. High levels of LDL or low levels of HDL can increase the risk of a heart attack by promoting plaque formation or impairing the ability of the blood vessels to dilate and respond to stress. However, cholesterol alone is not the only cause of a heart attack, as some people with low cholesterol levels can still have a heart attack due to other factors.

Blood Urea and Heart Attack

Blood urea nitrogen (BUN) is a waste product that is produced when the liver breaks down proteins and the kidneys filter them out of the blood. High levels of BUN can indicate kidney dysfunction, dehydration, or other medical conditions, but they are not directly related to a heart attack. However, severe dehydration or electrolyte imbalances can affect the heart's ability to function properly and increase the risk of a heart attack.

Blood Protein and Heart Attack

Blood proteins, such as albumin, globulin, and fibrinogen, play important roles in maintaining the balance of fluids, transporting nutrients, and clotting blood. However, abnormal levels of these proteins can indicate inflammation, infection, or other health problems that can increase the risk of a heart attack. For example, high levels of C-reactive protein (CRP), a marker of inflammation, can predict the risk of a heart attack even in people with normal cholesterol levels. Similarly, some genetic mutations that affect blood proteins can increase the risk of blood clots and atherosclerosis. However, blood protein levels alone are not a direct cause of a heart attack, but rather a potential indicator of underlying health issues.

Cholesterol... because when fat and cholesterol deposits in lumen of arteries and veins the surface area gets reduced that create excess pressure than normal.