Radiofrequency catheter ablation of cavo-tricuspid isthmus as treatment of atrial flutter in two dogs.
Two dogs were presented for episodic weakness caused by a very rapid supraventricular tachycardia with a ventricular rate of 360 bpm and 300 bpm, respectively. Electrocardiography showed narrow QRS complex tachycardia in both subjects, the first one with a fixed 2:1 atrioventricular block, and the second with variable degrees of atrioventricular block from 6:1 to 2:1. The electrophysiological studies revealed bidirectional and typical cavo-tricuspid isthmus-dependent atrial flutter, respectively. Radiofrequency catheter ablation was performed in both dogs and a bidirectional cavo-tricuspid isthmus block was successfully achieved. On follow-up, Holter monitoring confirmed resolution of the arrhythmias in both dogs.
Santilli
Roberto A
RA
Clinica Veterinaria Malpensa, Viale Marconi 27, 21017 Samarate, Varese, Italy. r.santilli@ecgontheweb.com
Perego
Manuela
M
Perini
Alberto
A
Carli
Andrea
A
Moretti
Paolo
P
Spadacini
Gianmario
G
D000818:Animals; D001282:Atrial Flutter / Q000175:diagnosis / Q000601:surgery / Q000662:veterinary*; D017115:Catheter Ablation / Q000662:veterinary*; D004283:Dog Diseases / Q000175:diagnosis / Q000601:surgery*; D004285:Dogs; D004562:Electrocardiography / Q000662:veterinary; D005260:Female; D006329:Heart Conduction System / Q000503:physiopathology / Q000601:surgery; D008297:Male; D016896:Treatment Outcome; D014261:Tricuspid Valve