Sinus Node Dysfunction and Sinus Node Recovery Time 

Discussion on sinus node dysfunction and sinus node recovery time.
Most frequent symptoms are syncope and presyncope. Other possible symptoms are fatigue, angina, and shortness of breath. Elderly patients may present with subtle symptoms like gastrointestinal distress or a change in mental status.
Symptoms can be intermittent, and documentation can be difficult at times. Marked sinus bradycardia/pause may be asymptomatic occasionally.