[Cardioinhibitory vagal response not related to pain, and induced by radiofrequency application during ablation of right posteroseptal accessory pathway].
Inappropriate sinus tachycardia is the most common arrhythmia induced by radiofrequency energy delivery in the posteroseptal area. It has been suggested that this could be secondary to parasymphathetic nerve injury. We report a patient with extreme sinus bradycardia and PR interval prolongation induced by radiofrequency energy delivered in the coronary sinus ostium area, but not related to any other stimulus. The most probable mechanism of the disorder was transient stimulation of the vagal afferent nerve fibers located in this anatomical area.
Echeverría
I J
IJ
Laboratorio de Electrofisiología. UMQ de Cardiología. Hospital General Universitario La Paz. Madrid. ignacioecheverria@yahoo.com
Merino
J L
JL
Peinado
R
R
Ramírez
L
L
Peinado
A
A
Sobrino
J A
JA
D017776:Autonomic Pathways / Q000503:physiopathology*; D017115:Catheter Ablation / Q000009:adverse effects*; D004562:Electrocardiography; D005260:Female; D006346:Heart Septum / Q000294:innervation; D006801:Humans; D008875:Middle Aged