Don't waste time with an internist, go directly to a cardiologist.
By the time an internist gets done with you, and sends you to a cardiologist, you could be dead.
As a Paramedic I have seen patients being treated by internists, who desperatly needed a cardiologist and did'nt get one.
Tell Your GP to refer you directly
Dear Ellen,
Depending on the doctor an internist should be able to evaluate him. He will probably get an EKG and perhaps some blood work such as cholesterol. If he finds anyting on exam he may order an echocardiogram. It would be helpful to have as much of the family history as possible to help guide testing.