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.
Circadian Rhythm Sleep Disorders. Circadian rhythms are what regulate our natural sleep and wake patterns. Learn more about circadian rhythm sleep disorders and what treatment options are available. Circadian Rhythm Sleep Disorders. Delayed Phase Sleep Disorder. Non-24 Sleep Wake Disorder.