A 10-year-old DSH cat presents with polyuria, polydipsia, and a palpable ventral neck mass. Serum T4 is 8.2 µg/dL (normal 0.8–4.0). Which cardiac abnormality is most commonly associated with this condition?
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A
Dilated cardiomyopathy
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B
Hypertrophic cardiomyopathy
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C
Restrictive cardiomyopathy
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D
Pericardial effusion