Adenosine sensitive focal atrial tachycardia originating from the non-coronary aortic cusp.
We report on the characteristics and the ablation procedure of a focal atrial tachycardia originating from the non-coronary aortic cusp. The electrophysiological features of the tachycardia included: (i) incessant pattern; (ii) easy induction and termination by atrial stimulation; (iii) earliest right atrial activation at the para-hisian area; and (iv) termination by adenosine. Left-sided mapping revealed the earliest atrial activation during the tachycardia at the non-coronary aortic cusp. Radiofrequency energy application at this site successfully terminated the tachycardia. Mapping of the non-coronary aortic cusp should always be considered when the earliest right atrial activation is recorded at the para-hisian area in order to avoid the risk of atrioventricular block by inappropriate ablation near the His-bundle region.
Weber
Reinhold
R
Abteilung Rhythmologie, Herz-Zentrum, Südring 15, 79189 Bad Krozingen, Germany.
Letsas
Konstantinos P
KP
Arentz
Thomas
T
Kalusche
Dietrich
D
D001011:Aorta / Q000601:surgery*; D018780:Body Surface Potential Mapping / Q000379:methods*; D017115:Catheter Ablation / Q000379:methods*; D005260:Female; D006801:Humans; D008875:Middle Aged; D013612:Tachycardia, Ectopic Atrial / Q000175:diagnosis* / Q000601:surgery*; D016896:Treatment Outcome