Idiopathic premature ventricular contractions arising from the pulmonary artery: importance of mapping in the pulmonary artery in left bundle branch block-shaped ventricular arrhythmias.
A patient underwent radiofrequency (RF) catheter ablation of symptomatic idiopathic ventricular contractions (PVCs). RF energy applications at 2 sites in the right ventricular outflow tract (RVOT), where both the earliest ventricular activation and near-perfect pace mapping were obtained, did not abolish the PVC but resulted in changes in the QRS morphology of the PVC. Complete elimination of the PVC was achieved with RF energy application at a site within the pulmonary artery 13 mm above the pulmonary valve, which was greater than 20 mm away from the failed ablation sites within the RVOT.
Tada
Hiroshi
H
Division of Cardiology, Gunma Prefectural Cardiovascular Center, Maebashi, Japan. tada.h@cvc.pref.gunma.jp
Kurosaki
Kenji
K
Ito
Sachiko
S
Naito
Shigeto
S
Yamada
Minoru
M
Miyaji
Kohei
K
Hashimoto
Tohru
T
Oshima
Shigeru
S
Nogami
Akihiko
A
Taniguchi
Koichi
K
D000328:Adult; D002037:Bundle-Branch Block / Q000150:complications / Q000000981:diagnostic imaging / Q000628:therapy*; D002304:Cardiac Pacing, Artificial; D017115:Catheter Ablation; D004562:Electrocardiography; D005260:Female; D006801:Humans; D011651:Pulmonary Artery / Q000000981:diagnostic imaging; D011859:Radiography; D014693:Ventricular Fibrillation / Q000150:complications / Q000000981:diagnostic imaging / Q000628:therapy*; D018879:Ventricular Premature Complexes / Q000150:complications / Q000000981:diagnostic imaging / Q000628:therapy*