Syncope or presyncope (50%)
Palpitations
Fatigue
Generalized weakness
Dyspnea
Angina
Disturbed sleep
Confusion
Sick sinus syndrome
Regular
Hypertrophic cardiomyopathy
AV Node Independent
Brugada syndrome
Sinus tachycardia
Decompression sickness
Atrial tachycardia 