Ann Pediatr Card Close
 

Figure 1: The 12-lead electrocardiogram showing a regular narrow QRS tachycardia with a rapid ventricular rate of 250 bpm with a long RP interval. The P waves were negative in V1 and aVR and positive in leads II, III, and aVF suggestive of ectopic atrial tachycardia of superolateral crista terminalis origin

Figure 1: The 12-lead electrocardiogram showing a regular narrow QRS tachycardia with a rapid ventricular rate of 250 bpm with a long RP interval. The P waves were negative in V1 and aVR and positive in leads II, III, and aVF suggestive of ectopic atrial tachycardia of superolateral crista terminalis origin