Question

Heart attack involves a blockage of the
A.Carotid artery
B.Aorta
C.PulmD.onary vein
Coronary arteries

Answer 1

Hint: Generally Myocardial infarction (MI) is also called the heart attack that usually occurs mainly when there is damage causing to the heart muscle because of decreased blood flow to the heart stops working. Chest pain and discomfort feeling that travels towards the shoulder, arm, neck, and jaw is the most common symptom of the Myocardial infarction (MI).

Complete answer:Myocardial infarction (MI) refers to tissue death (infarction) of the heart muscle (myocardium) caused by ischemia, which is a lack of oxygen delivery to myocardial tissue. It describes the short-term and sudden change in symptoms related to blood flow of the heart so that is a type of acute coronary artery syndrome. When there is cell death in the organs or tissues unstable angina and MI occurs, unlike the acute coronary syndrome that can be measured by the blood test of atherosclerotic disease that may become worse to cause various harms. The ischemic zone is the area in the heart where necrosis occurs in the zone of the subendocardial zone.
The traditional treatment for heart attack that is a myocardial infarction (MI) includes thrombolytic therapy, drug therapy, percutaneous coronary intervention, and coronary artery bypass grafting but in the new strategies, the treatment includes novel techniques like embryonic stem cells, inducing pluripotent cells, bone marrow cells, cardiac stem cells, exosomes derived stem cells and mesenchymal stem cells.
Atherosclerotic disease is not the only cause of myocardial infarction, and it may exacerbate or contribute to other causes. A myocardial infarction may result from a heart with a limited blood supply subject to increased oxygen demands, such as fever, a fast heart rate, hyperthyroidism, too few red blood cells in the bloodstream, or low blood pressure. When there is damage during the procedures of percutaneous coronary intervention or coronary artery bypass grafts this leads to myocardial infarction (MI).
Hence, the correct option is (D) Coronary arteries.

Note: There are several different biomarkers used to determine the presence of cardiac muscle damage. Troponins, measured through a blood test, are considered to be the best and are preferred because they have greater sensitivity and specificity for measuring injury to the heart muscle than other tests. A rise in troponin occurs within 2–3 hours of injury to the heart muscle, and peaks within 1–2 days. The level of the troponin, as well as a change over time, are useful in measuring and diagnosing or excluding myocardial infarctions, and the diagnostic accuracy of troponin testing is improving over time.