Right atrial thrombus formation in a dog after successful electrical cardioversion for atrial fibrillation

Marta Karn; Brianna M Potter; Brian A Scansen; June A Boon; Viktor Szatmári

doi:10.1111/jvim.16799

Right atrial thrombus formation in a dog after successful electrical cardioversion for atrial fibrillation

Marta Karn, Brianna M Potter, Brian A Scansen, June A Boon, Viktor Szatmári^*

^*Corresponding author for this work

Colorado State University

Research output: Contribution to journal › Article › Academic › peer-review

Abstract

Right atrial masses in dogs are commonly diagnosed as malignant tumors. This report describes a dog with a right atrial mass that appeared after successful electrical cardioversion of atrial fibrillation and resolved with antithrombotic treatment. A 9-year-old mastiff was presented for acute vomiting, and occasional cough of several weeks' duration. Ultrasonographic and radiographic examinations of the abdomen and chest identified mechanical ileus, as well as pleural effusion and pulmonary edema, respectively. Echocardiography indicated a dilated cardiomyopathy phenotype. During anesthetic induction for laparotomy, atrial fibrillation developed. Electrical cardioversion successfully restored sinus rhythm. An echocardiogram performed 2 weeks later disclosed a right atrial mass, which had not been apparent before cardioversion. Repeat echocardiography after 2 months of clopidogrel and enoxaparin treatment failed to detect the mass. Intra-atrial thrombus formation is possible after successful cardioversion of atrial fibrillation and should be considered as a differential diagnosis for echocardiographically detected atrial masses.

Original language	English
Pages (from-to)	1482-1487
Number of pages	6
Journal	Journal of Veterinary Internal Medicine
Volume	37
Issue number	4
Early online date	29 Jun 2023
DOIs	https://doi.org/10.1111/jvim.16799
Publication status	Published - 1 Jul 2023

Bibliographical note

Funding Information:
No funding was received for this study. The authors are grateful to all students and colleagues, especially from the anesthesiology, cardiology and cardiac surgery, general surgery, radiology, and critical care units, who were involved in the diagnostic and therapeutic procedures, as well as the supportive care of the reported dog.

Publisher Copyright:
© 2023 The Authors. Journal of Veterinary Internal Medicine published by Wiley Periodicals LLC on behalf of American College of Veterinary Internal Medicine.

Keywords

anticoagulation
atrial stunning
echocardiography
hemangiosarcoma
hypercoagulation
neoplasia
thrombolysis

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Veterinary Internal Medicne - 2023 - Karn - Right atrial thrombus formation in a dog after successful electricalFinal published version, 1.35 MBLicence: CC BY

Cite this

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title = "Right atrial thrombus formation in a dog after successful electrical cardioversion for atrial fibrillation",

abstract = "Right atrial masses in dogs are commonly diagnosed as malignant tumors. This report describes a dog with a right atrial mass that appeared after successful electrical cardioversion of atrial fibrillation and resolved with antithrombotic treatment. A 9-year-old mastiff was presented for acute vomiting, and occasional cough of several weeks' duration. Ultrasonographic and radiographic examinations of the abdomen and chest identified mechanical ileus, as well as pleural effusion and pulmonary edema, respectively. Echocardiography indicated a dilated cardiomyopathy phenotype. During anesthetic induction for laparotomy, atrial fibrillation developed. Electrical cardioversion successfully restored sinus rhythm. An echocardiogram performed 2 weeks later disclosed a right atrial mass, which had not been apparent before cardioversion. Repeat echocardiography after 2 months of clopidogrel and enoxaparin treatment failed to detect the mass. Intra-atrial thrombus formation is possible after successful cardioversion of atrial fibrillation and should be considered as a differential diagnosis for echocardiographically detected atrial masses.",

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AU - Boon, June A

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N2 - Right atrial masses in dogs are commonly diagnosed as malignant tumors. This report describes a dog with a right atrial mass that appeared after successful electrical cardioversion of atrial fibrillation and resolved with antithrombotic treatment. A 9-year-old mastiff was presented for acute vomiting, and occasional cough of several weeks' duration. Ultrasonographic and radiographic examinations of the abdomen and chest identified mechanical ileus, as well as pleural effusion and pulmonary edema, respectively. Echocardiography indicated a dilated cardiomyopathy phenotype. During anesthetic induction for laparotomy, atrial fibrillation developed. Electrical cardioversion successfully restored sinus rhythm. An echocardiogram performed 2 weeks later disclosed a right atrial mass, which had not been apparent before cardioversion. Repeat echocardiography after 2 months of clopidogrel and enoxaparin treatment failed to detect the mass. Intra-atrial thrombus formation is possible after successful cardioversion of atrial fibrillation and should be considered as a differential diagnosis for echocardiographically detected atrial masses.

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Right atrial thrombus formation in a dog after successful electrical cardioversion for atrial fibrillation

Abstract

Bibliographical note

Keywords

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