Huh? Cardiovascular is funded to the gills in research. There is so much data out there on lipid profiles, lipoproteins, biomarkers of increased cardiovascular risk to even begin to realistically sort out. We have data on outcomes for CAD on a variety of antihypertensives, coronary revascularization with and without drug eluting stents vs. CABG vs. medical therapy alone. there are studies comparing clopidogrel plus aspirin vs. aspirin alone vs. clopidogrel alone for prevention of secondary events vs. prevention of primary events vs. etc....
The only people who think cardiovascular research is underfunded are disenfranchised cardiologists at second tier university hospitals who end up sitting on admission commitees because they are unable to obtain a research grant. That is how you should have answered the question.