The Various Types of Cardiac Arrhythmias

While there are many types of cardiac arrhythmias, they can be divided into four general groups, which you can read about here:

"extra" heart beats, known as premature atrial complexes (PACs) or premature ventricular complexes (PVCs)

bradycardias, or arrhythmias that make the heart rhythm too slow

tachycardias, or arrhythmias that make the heart rhythm too fast. One of the most common tachyarrhythmias is atrial fibrillation.

disorders affecting the bundle branches, referred to as bundle branch block, or BBB. While BBB is not strictly a cardiac arrhythmia (since it's not really the heart rhythm, but instead the pattern of conduction of the electrical signal that is disordered in BBB), cardiologists usually lump it in with the heart rhythm disturbances, so we will do the same.