âPrimary care physicians fall into [one of two categories]: family medicine doctors and internal medicine doctors,â explains Saju Mathew, M.D., a primary care physician at Piedmont Physicians Group. âWeâre all primary care physicians, but the biggest difference is internal medicine doctors are like adult pediatricians.â.
Other arrhythmias include: 1  Premature Contractions. Extra, early, or âskippedâ beats are the most common cause of irregular heart rhythms. 2  Long QT Syndrome (LQTS) Long QT Syndrome is a disorder of the electrical system. 3  Heart Block.
There are only slight differences between these arrhythmias. slide 1 of 5. About Arrhythmias An arrhythmia is an abnormal heart beat. Two groups of arrhythmia are bradycardia and tachycardia. Bradycardia is a heart rate slower than 60 beats per minute (bpm). Tachycardia is a heart rate faster than 100 bpm. Two forms of tachycardia are sinus tachycardia and supraventricular tachycardia. There is little difference between supraventricular tachycardia and sinus tachycardia.