He does the electrocardiogram testing. It tells beats per minutes, reads blood flow and picks up any problems that your heart may have such as murmurs.
In my neighborhood they are called electrophysiologists but you are taking about a cardiologist who sub specializes in the heart conduction system. most people referred to them have some type of rhythm disturbance
If you disect the word its simple. Electro=electric, cardio=heart. Therefor he is a doctor who studies and specializes in the electrical part of the heart. These are the doctors who decide if a pacemaker is necessary. The doctor who pays attention to your heart rythms, etc...
A cardiologist is a heart doctor. "Electro" refers to electrical. I know that an electrocardiogram is put on your chest with little electrical pulsating wires which connect to a big machine that reads your heart's electrical charges to determine if it is functioning in a proper manner so maybe the electrocardiologist read the electrocardiograms.
The electrocardiogram represents electrical activity within the heart. An ECG measures the changing voltage and displays it graphically on the ECG screen. The program simulated the ECG display and gives an online interpretation.
an electrophysiologist is a heart doctor that specializes in abnormal heart rhythms. the abnormal heart rhythm can either be too slow, in which case s/he may put in a pacemaker, or too fast in which case s/he may treat you with medications, or s/he can make tiny burns in the heart conduction system to cure the fast heart rhythm, or if the abnormal rhythm is dangerous s/he can put in a defibrillator. some people with very weak hearts get defibrillators even though they have never had arrhythmias. that's becasue they are at risk of sudden cardiac death, which the defibrillator can prevent