Question: Muhammad Hafizullah has contributed to guidelines on what type of damage to the cardiac muscle?
Related documents: [0]  [DOC] Myocardial infarction (MI), commonly known as a heart attack, occurs when blood flow decreases or stops to a part of the heart, causing damage to the heart muscle. The most common symptom is chest pain or discomfort which may travel into the shoulder, arm, back, neck, or jaw. Often it is in the center or left side of the chest and lasts for more than a few minutes. The discomfort may occasionally feel like heartburn. Other symptoms may include shortness of breath, nausea, feeling faint, a cold sweat, or feeling tired. About 30% of people have atypical symptoms. Women more often have atypical symptoms than men. Among those over 75 years old, about 5% have had an MI with little or no history of symptoms. An MI may cause heart failure, an irregular heartbeat, cardiogenic shock, or cardiac arrest. [END] 
[1]  [DOC] Muhammad Hafizullah (Urdu: محمد حافظ الله‎ ) is a Pakistani professor of cardiology and the current vice chancellor of Khyber Medical University (KMU) in Peshawar. He is the project director of the Peshawar Institute of Cardiology and has contributed to national guidelines on thrombolysis, acute coronary syndrome, and ST elevation myocardial infarction developed by the Pakistan Cardiac Society. [END] 
Answer: 
Myocardial infarction
Myocardial infarction