Answer: The correct answer is ischemia.
Ischemia refers to the decrease in blood supply to a particular organ due to which it does not get enough oxygen for cellular metabolism.
Myocardial (related to heart) ischemia refers to the decrease in the supply of oxygenated blood to the heart tissue. Due to decreased oxygen supply, the pumping efficiency of the heart gets reduced.
The symptoms associated with myocardial ischemia are chest pain or pressure (specially in the left side), arm or shoulder pain, jaw pain, increased heart rate, shortness of breath, et cetera.
Thus, from all the symptoms and diagnostic reports, we can conclude that Claire is suffering from myocardial ischemia.