* Isolated<unk>  beats frequently cause no symptoms, although the most common symptom is the perception of a 'missed beat'. This occurs because the person notices the prolonged gap between the early<unk>  beat and the next normal beat. * Palpitations * Feeling faint
Ectopic pacemaker
Wandering atrial pacemaker
Ectopic beat
Junctional ectopic tachycardia
Pre-excitation syndrome
Sinus arrhythmia
Benign early repolarization
Supraventricular tachycardia