Successful Use of an Acceleration Rate Response Pacemaker with a Transvenous Steroid-Eluting Screw-in Lead for Third-Degree Atrioventricular Block in a Labrador Retriever

Abstract

ABSTRACT. Permanent pacemakers are commonly used in veterinary practice and can have a dramatic effect on the treatment of heart block. A Labrador Retriever dog suffering from exercise intolerance secondary to third degree atrioventricular block was treated with a new pacemaker system. A steroid-eluting screw-in type lead that has the advantage of being more fixed to the myocardial wall without increasing the pacing threshold was used. The heart rate was regulated with an acceleration sensing pacemaker generator that included several automatic modulation systems. Nineteen months after implantation, the dog has a normal level of activity. The present case suggests that this pacemaker design may offer important advantages for canine patients. KEY WORDS: canine, cardiac arrhythmia, heart block.

2022 Update of the Consensus on the Rational Use of Antithrombotics and Thrombolytics in Veterinary Critical Care (CURATIVE) Domain 1‐ Defining populations at risk

“…. 331–364 Most were case series or single case reports (LOE 5), and 1240 dogs were described, of which 60 had suspected or confirmed thrombosis (5%). Two studies were experimental (LOE 3) but of poor quality 336,361 .…”

“…334,337,339,346 Eighteen studies (1 LOE 3 good, 17 LOE 5 good-fair) were judged to be neutral to the PECO question based on long-term follow-up of dogs after pacemaker implantation without reports of thrombotic complications. 332,333,336,340,342,343,[347][348][349][350][351][352][353][354]356,359,363,364 An experimental (LOE 3) study described 74 dogs with implanted pacemakers (≤180 days). A variety of complications were reported, but thrombosis did not occur.…”

La pose de pacemaker chez le chien: le point sur les 30 dernières années

“…Une réaction fibrotique autour du site de fixation de l'électrode peut être à l'origine d'une augmentation du seuil de stimulation, et donc à une anomalie d'entraînement ou de détection.Cette complication peut conduire soit à modifier les paramètres du stimulateur soit en dernier recours à changer le site d'implantation myocardique. Elle peut cependant être limitée en utilisant des électrodes délivrant localement des stéroïdes (Miura et al, 2003). Une rupture du conducteur peut enfin survenir lors d'un traumatisme violent.…”