Arrhythmia Also called: Irregular heartbeat An arrhythmia is a problem with the rate or rhythm of your heartbeat.
[icdlist.com]
All types of heart block can increase your risk of developing other types of heart rhythm problems, such as atrial fibrillation (an irregular and abnormally fast heart rate
[nhs.uk]
Auscultation of the heart revealed decreased heart sounds, B1 and B2, irregular rhythm, without murmurs. The remaining of the physical exam showed no abnormalities.
[scielo.br]