Discuss the etiology and pathophysiology of coronary artery disease (CAD).

Inquiry Problem
Discuss the etiology and pathophysiology of coronary
artery disease (CAD). Are there links between the
epidemiology and etiology/pathophysiology in CAD? Is
there a physiological link between CAD and exercise that
manifests in certain symptoms?
In a roughly 3 page essay to address the above
statement/questions.