TSR needs to have facility to continuously save what you type - I typed in 3 paragraphs for you soon after my last post, PC crashed and lost all!
Anyway, I'll try again:-
Consider this topic: "The relative merits of exercise electrocardiography testing, coronary arteriography and cardiac magnetic resonance (CMR) imaging as methods to further evaluate diagnosis of angina pectoris".
Ok this sounds a bit complex to you I am sure, BUT:-
a) It is something that is being disputed hotly currently with different viewpoints in UK, USA and developing countries, respectively.
b) I am happy to explain the basics to you: you have probs heard of exercise ECG, where the patient exercises quite intensively on a treadmill with increasing effort and the doctor looks to see if there are changes in the ECG that might indicate coronary artery stenosis; In coronary arteriography, a radio-opaque contrast medium ("dye") is injected intravenously (into a vein) and a special x-ray taken that shows up the blood flowing in the coronary arteries as white (radio-opaque = opaque to x-rays) disclosing any stenosis [narrowing];
The third test is an MRI of the heart. , and shows up precisely which arteries are blocked, but is expensive.
c) I can supply you with a lot of research data and info.
d) Your teachers will not know much about it, so you can get away with minor errors.
ACTUALLY, I MIGHT BE GETTING CARRIED AWAY WITH MY SHELDON-NESS (!); perhaps this might be a bit advanced at your level. Let me think of an alternative that is less technical, although don't discard the above completely.