Sinus bradycardia

Sinus bradycardia is a cardiac rhythm disorder characterized by an abnormally slow resting heart rate originating from the sinoatrial node, standardly defined in adults as a regular sinus rhythm below 60 beats per minute, or below age-adjusted thresholds in pediatric populations Affecting the cardiovascular system, it is electrophysiologically identified on an electrocardiogram by normal P wave morphology preceding every QRS complex, accompanied by prolonged cycle lengths Pathophysiologically, t...

Sinus bradycardia is a cardiac rhythm disorder characterized by an abnormally slow resting heart rate originating from the sinoatrial node, standardly defined in adults as a regular sinus rhythm below 60 beats per minute, or below age-adjusted thresholds in pediatric populations Pathophysiologically, the condition results from intrinsic sinoatrial nodal dysfunction, heightened vagal tone, metabolic disturbances, myocardial ischemia, or negative chronotropic pharmacotherapy

Affecting the cardiovascular system, it is electrophysiologically identified on an electrocardiogram by normal P wave morphology preceding every QRS complex, accompanied by prolonged cycle lengths

While commonly a benign physiological finding in well-conditioned athletes and during sleep, it can manifest pathologically when decreased cardiac output leads to end-organ hypoperfusion, producing lightheadedness, fatigue, presyncope, or syncope

While commonly a benign physiological finding in well-conditioned athletes and during sleep, it can manifest pathologically when decreased cardiac output leads to end-organ hypoperfusion, producing lightheadedness, fatigue, presyncope, or syncope

While commonly a benign physiological finding in well-conditioned athletes and during sleep, it can manifest pathologically when decreased cardiac output leads to end-organ hypoperfusion, producing lightheadedness, fatigue, presyncope, or syncope