Table 1

P Wave Configuration by Tachycardia Location

Tachycardia LocationECG Lead
IaVLV1IIIIIaVF
High CT
 Positive8439910
 Negative143
 Biph/iso12411
Mid-CT
 Positive631434
 Negative21
 Biph/iso33222
Low CT
 Positive2
 Negative2222
 Biph/iso2
RUPV
 Positive323333
 Negative2
 Biph/iso11111
TA
 Positive33
 Negative3121
 Biph/iso212
CS os
 Positive2
 Negative1222
 Biph/iso21

Biph/iso = biphasic/isoelectric; CS = coronary sinus; CT = crista terminalis; ECG = electrocardiographic; RUPV = right upper pulmonary vein; TA = tricuspid annulus.