Back Problems Involving Heart Rhythm There are many problems that affect the heart's rhythm that require care by a physician or other healthcare professional. Listed in the directory below you will find some additional information regarding problems involving heart rhythm, for which we have provided a brief overview. Arrhythmias Overview of Pacemakers and Implantable Cardioverter Defibrillators (ICDs) Living With a Pacemaker or Implantable Cardioverter Defibrillator (ICD)