Table 1.

Local Electrogram Characteristics at the Successful and Unsuccessful Sites

	Successful RF Site During SR	Successful RF Site During AT	Unsuccessful RF Site During SR
Atrial electrogram
Amplitude, mV	0.407±0.281	0.430±0.304	0.487±0.447
Width, mm	37.0±9.2	39.2±8.0	38.9±8.0
Slow potential	40/40 Patients	40/40 Patients	12/40 Patientsa
Amplitude, mV	0.110±0.049	0.088±0.042b	0.025±0.046a
Width, mm	38.8±13.4	47.8±14.1a	8.1±13.2a
Distance between EAAS and RF site, mm	9.5±2.3		15.1±3.4a

AT indicates atrial tachycardia; EAAS, earliest atrial activation site during AT; SR, sinus rhythm.

^a P<0.0001 vs successful radiofrequency energy (RF) ablation site during sinus rhythm.

^b P<0.001 vs successful RF site during sinus rhythm.