Palpitations during exercise or stress may be the presenting symptom. Because the initial symptoms are often mild, there may be significant myocardial damage at the time of diagnosis. It is therefore possible for these patients to present with the symptoms of heart failure, such as shortness of breath, fatigue and oedema (fluid retention).
Permanent junctional reciprocating tachycardia
Wandering atrial pacemaker
AV nodal reentrant tachycardia
Tachycardia-dependent bundle branch block
Junctional ectopic tachycardia
Second-degree atrioventricular block
Atrioventricular reentrant tachycardia
Re-entry ventricular arrhythmia