Keywords: AT; AVNRT; AVRT; Atrial tachycardia; Atrioventricular nodal reentrant tachycardia; CL; FP; LCP; PAC; Supraventricular tachycardia; UCP; atrial tachycardia; atrioventricular nodal reentrant tachycardia; atrioventricular reentrant tachycardia; cycle length; fast pathway; lower common pathway; premature atrial complex; upper common pathway.