TROMBO ATRIAL DIREITO ASSOCIADO À MARCA PASSO: RELATO DE CASO

Abstract

Pacemaker implantation is recommended for symptomatic bradyarrhythmias in dogs, including second- and third-degree atrioventricular block and sick sinus syndrome. However, dogs with transvenous pacing electrodes have an increased risk of thrombosis. The most recommended treatment after the diagnosis of pacemaker lead-associated thrombosis includes anticoagulant therapy, but dual antithrombotic treatment (DAT) with an anticoagulant and an antiplatelet agent may be more effective. There is no consensus treatment for humans or dogs with pacemaker-associated thrombosis. Therefore, the objective of the present work is to report a case of right atrial thrombus associated with a pacemaker in a dog with biventricular heart failure and a previous history of third-degree atrioventricular block, with all the pathologies described being detected through electrocardiogram and echocardiogram. Despite the absence of obvious symptoms, treatment to reduce the thrombus was started with Clopidogrel and Rivaroxaban, with quarterly follow-up planned to verify the effectiveness of the treatment, but until the end of the present study there was no additional information about the patient's current status.