I am a grad student in cardiovascular research [although less active at the moment]. I also recently had a few heart palpitations, that I sought medical attention for.
This included EKG's in the hospital, wearing a holter monitor, getting a stress test, and an echocardiogram. Really neat things for an interested researcher.
What is wanted is not the will to believe, but the will to find out, which is the exact opposite. -- Bertrand Russell, "Skeptical Essays", 1928