Atrial-Based Pacing for Sinus Node Dysfunction in Dogs: Initial Results. Effectiveness of Pacemaker Treatment in the Bradycardia-Tachycardia Syndrome.The American Journal of Cardiology. Arrhythmia & ElectrophysiologyĬonde C.A., Leppo J., Lipski J., Stimmel B., Litwak R., Donoso E. Biology of the Sinus Node and its Disease. Evolutionary innovations in cardiac pacing. Absent Left Main Coronary Artery and Separate Ostia of Left Coronary System in a Patient with Holt-Oram Syndrome and Sinus Node Dysfunction. In: 22º Seminário de Iniciação Cientifica da UDESC (Florianópolis, Brasil). Síndromedo nó sinusal em um schnauzer - relato de caso. Diagnosis and Treatment of Sick Sinus Syndrome. The implantation of a pacemaker is the treatment of choice and is effective for the condition, but its use is not uniformly accessible throughout the country.Īdán V. There is a need for detailed histories and complementary exams because the clinical signs do not always correlate with electrocardiographic findings. Sick sinus syndrome is a disease commonly found in schnauzers. In the present report, after implantation of a pacemaker, clinical signs ceased, and the patient was in good general health and could return to her normal activities. The treatment of choice for SSS is an implantable pacemaker device however, because the method is not widely used in Brazil, a second option is drug treatment. A thorough medical history and physical examination must be performed to diagnose SSS because erroneous diagnosis and incorrect interpretations of clinical signs can lead to the misuse of medications. Syncope is a clinical sign commonly present in patients with dysfunction of the sinus node, and episodes of syncope were reported by the owner of the dog referred to in the present report.

The diagnosis of SSS is limited to cases in which the patient does not present with abnormalities in an electrocardiogram. It is usually diagnosed based on clinical signs and the presence of sinus bradycardia and sinus pauses in electrocardiograms or Holter monitoring. Currently, clinical signs are absent.ĭiscussion: Sinus node dysfunction is one of the main reasons for pacemaker implantation. Three weeks after diagnosis, a pacemaker device was implanted. After the start of treatment, there was a reduction in the frequency of episodes of syncope. The prescribed medications were aminophylline 20 mg/ kg TID, enalapril maleate 0.5 mg/kg BID, spironolactone 1 mg/kg SID and furosemide 2 mg/kg BID. The patient presented with significant episodes of syncope during outpatient care, and based on the clinical manifestation, drug therapy was initiated. A Holter monitor was used to establish the diagnosis of SSS. The electrocardiogram showed the presence of sinus arrest with escape rhythms, pauses of 10 s and the presence of bradycardia-tachycardia syndrome. Also during cardiac auscultation, a holosystolic heart murmur was verified, with a focus on the mitral and tricuspid valves. During the physical examination, cardiac auscultation revealed the heart rate to be 56 beats per minute (bpm), and there was a presence of pauses. The owner mentioned convulsive episodes, but a thorough medical history and patient assessment revealed that the dog exhibited episodes of syncope. The present work aims to describe clinical aspects and findings from tests related to sick sinus syndrome (SSS) and presents the case of a female schnauzer with SSS.Ĭase: A 10-year-old female dog (schnauzer, 8.6 kg) attended the Veterinary Hospital of the FMVZ-UNESP - Botucatu.

Reports of clinical signs by animal owners are not always clear and precise, which may result in erroneous interpretations by veterinarians consequently, the use of inappropriate therapies. It commonly occurs in elderly dogs, especially miniature schnauzers however, it is also detected in dachshunds and pugs. Universidade Estadual Paulista (UNESP), Botucatu.īackground: Sick sinus syndrome is characterized by the presence of arrhythmias, including persistent sinus bradycardia, sinus arrest and paroxysmal atrial tachyarrhythmia. Departamento de Clínica Veterinária, Faculdade de Medicina Veterinária e Zootecnia (FMVZ), Universidade Estadual Paulista (UNESP), Botucatu, SP, Brazil.ĭepartamento de Cirurgia e Anestesiologia Veterinária, Faculdade de Medicina Veterinária e Zootecnia (FMVZ), Universidade Estadual Paulista (UNESP), Botucatu, SP, Brazil.ĭepartamento de Cirurgia e Ortopedia, Faculdade de Medicina de Botucatu (FMB),

Sick sinus syndrome canine