The accompanying photomicrograph shows narrowing of an artery by an atheroma (A).Which one of the following would be the likely clinical symptom(s)if the artery in question were a coronary artery?

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Aching pain in the chest due to ischaemia or lack of blood flow to the myocardium is generally called angina pectoris.If untreated,the artery will continue to narrow,and can cause myocardial infarction,often with resultant ventricular fibrillation.Usually,symptoms do not occur until at least 70% of the vessel is occludeDTreatment is usually angioplasty with stenting.Coronary artery bypass is also commonly used,if angioplasty and stenting fails.

The Accompanying Photomicrograph Shows Narrowing of an Artery by an Atheroma