J Vet Cardiol 2021 Aug 9;36:123-130. Epub 2021 Jun 9.
Cardiology Department, Clinica Veterinaria Malpensa - AniCura, Viale Marconi 27, Samarate, Varese, 21017, Italy; Department of Clinical Sciences, Cornell College of Veterinary Medicine, Ithaca, NY, 14853-6401, USA. Electronic address:
Four dogs were referred to our institution for incessant supraventricular tachycardias causing weakness; congestive heart failure was present in one dog. At admission, all dogs had a surface electrocardiogram showing a narrow QRS complex tachycardia with a ventricular rate ranging from 80 to 300 bpm, variable atrioventricular conduction ratio from 1:1 to 3:1, and positive atrial depolarizations in inferior leads (II, II, III, and aVF), with isoelectric lines between them. Three of four dogs had a dilated cardiomyopathy phenotype; one dog had a heart base tumor involving the cranial vena cava wall. Read More