Surprisingly, no large-scale studies with this specific aim had been previously reported in the veterinary literature. The goal of this study was to evaluate SSS patients from the time of presentation or diagnosis through treatment (including modality), effectiveness of treatment, and overall outcome. So Ward et al out of the North Carolina State University Veterinary Hospital wanted to evaluate SSS in dogs in a paper called Outcome and survival in canine sick sinus syndrome and sinus node dysfunction: 93 cases (2002-2014), which was published in the Journal of Veterinary Cardiology in 2016. In reality, SND and SSS likely represent a continuum of conduction systemic disease. Some feel that ECG findings described above in patients with no clinical signs should be termed sinus node dysfunction (SND) as opposed to SSS, while others contend that SSS classification should also not include patients who show a response to anticholinergic administration – drugs like atropine (indicating autonomic (vagal) dysfunction). Typical ECG findings of SSS include inappropriate sinus arrhythmia (e.g., during exertion, stress, etc., when tachycardia would be expected), sinus bradycardia, sinus arrest, and in some cases supraventricular tachycardia (SVT) as part of a bradycardia-tachycardia syndrome. Definitive diagnosis of SSS technically requires electrophysiologic studies, but in most cases the practical/clinical diagnosis of SSS in dogs is made based on identification of sinoatrial dysfunction on an ECG in conjunction with clinical signs (e.g., syncope, weakness, etc). SSS is the second most common reason for permanent artificial pacemaker implantation (PAP) intervention in dogs. In this VETgirl online veterinary CE podcast, we review the outcome and survival in dogs with sick sinus syndrome, a life-threatening bradyarrhythmia.įirst, let’s review sick sinus syndrome (SSS).
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