Key result
Septal cardiac hemangiosarcoma causing advanced AV block is successfully managed with pacing, chemo, and radiation.
Why the study?
Second-degree AV block associated with cardiac hemangiosarcoma in the interventricular septum is a rare clinical presentation requiring detailed characterization.
Case Report (n=1)
Consider atypical septal masses in dogs with high-degree AV block; leaves open optimal diagnostic and therapeutic strategies.
A 13‐year‐old, male, neutered Maltese presented for lethargy and anorexia. Clinical examination identified bradycardia and a grade 2/6 systolic left basilar murmur. A six‐lead electrocardiogram revealed high‐degree, 4:1 second‐degree atrioventricular block, with a rate of 40 beats per minute. Echocardiography revealed a large mass in the interventricular septum, an atypical location for a cardiac mass, as a potential cause of the arrhythmia. An epicardial pacemaker was placed and a mass within pericardium was biopsied. Histopathology revealed hemangiosarcoma. The patient was treated with chemotherapy and radiation therapy and was euthanased 2 months following diagnosis.
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Margiotta et al. (2023) conducted a case report in Cardiac hemangiosarcoma with second-degree AV block (n=1). Epicardial pacemaker, chemotherapy, and radiation therapy was evaluated. An atypical cardiac hemangiosarcoma in the interventricular septum caused high-degree second-degree AV block in a dog, which was managed with an epicardial pacemaker, chemotherapy, and radiation.
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