If a dog has mitral regurgitation with left atrial enlargement on radiographs, which ACVIM stage is most consistent?

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Prepare for the Primary Care II Senior Dog Care Exam. Utilize flashcards and multiple-choice questions with hints and explanations to ensure you're ready for your test!

Multiple Choice

If a dog has mitral regurgitation with left atrial enlargement on radiographs, which ACVIM stage is most consistent?

Explanation:
In this context, the dog has structural heart disease from mitral regurgitation and radiographs show left atrial enlargement, which means the heart has remodeled due to the volume overload, but there are no reported signs of congestive heart failure. That combination fits Stage B2. Stage B1 would require structural disease without chamber enlargement on imaging. Stage C would require current or past clinical signs of heart failure, such as coughing, difficulty breathing, or pulmonary edema; those signs aren’t described here. So left atrial enlargement with mitral regurgitation points to Stage B2.

In this context, the dog has structural heart disease from mitral regurgitation and radiographs show left atrial enlargement, which means the heart has remodeled due to the volume overload, but there are no reported signs of congestive heart failure. That combination fits Stage B2. Stage B1 would require structural disease without chamber enlargement on imaging. Stage C would require current or past clinical signs of heart failure, such as coughing, difficulty breathing, or pulmonary edema; those signs aren’t described here. So left atrial enlargement with mitral regurgitation points to Stage B2.

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