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.
Abnormal Heart Rhythm: Research Doctors & Specialists. 1  Cholesterol Specialists: Clinical Lipidology (Cholesterol/Triglycerides) Diabetes, Endocrinology & Metabolism. 2  Cardiac (Heart) Specialists: Cardiology (Heart specialists) Pediatric Cardiology (Child Heart Specialists) Cardiothoracic Surgery. 3  more specialists...Â».