Fred was admitted to the cardiac unit with chest pains. No arrhythmias and no large changes in the heart rate were observable. Blood samples taken over the next few days showed no increase in enzymes such as creatine phosphokinase. A possible treatment of the condition is

A possible treatment for Fred's condition is: nitroglycerin.

Explanation:

Nitroglycerin is a medication used to prevent angina (chest pain), which is something that occurs when the heart muscle (the myocardium) is not receiving enough blood. This is common in people with coronary artery disease.

Nitroglycerin works by relaxing the blood vessels to make blood flow with more ease to the heart.

answer; /// i believe the correct answer is (thrombocytopenia); (a)