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 Disorder: Common Symptoms. You may have Circadian Rhythm Disorder if you are experiencing any of these symptoms: 1  Difficulty falling asleep and/or staying asleep.  Normal quantities of sleep, but with late bed times and wake-up times.