Answer: Angina can be caused by a temporary situation, such a exercise that increases blood flow throughout the body. A myocardial infarction is more serious condition because it means that heart muscle is damaged.
Explanation: Angina is used to describe the type of pain that an individual experiences when there is problem in blood vessels of heart. Angina is a symptom that can signal the presence of a more serious condition such as MI.
A myocardial infarction or heart attack occurs when there is insufficient blood flow to heart muscles from the lack of oxygen. The blockage is occurs due to clot that results in permanent damage in heart muscle.