Irregular bradycardia

Irregular bradycardia is a cardiac rhythm characterized by a heart rate below 60 beats per minute with an inconsistent interval between beats. It is clinically significant as it may indicate underlying conduction system disease or autonomic dysfunction, affecting cardiac output and causing symptoms like dizziness or syncope. A common association is sick sinus syndrome, which can lead to intermittent pauses or arrhythmias requiring pacemaker insertion.