Echocardiographic characterization of a hypertrophic cardiomyopathy phenotype in an apparently healthy cat

Arni Diana Fitri (Division of Surgery and Radiology, School of Veterinary Medicine and Biomedical Sciences, IPB University, Bogor)
Dwi Utari Rahmiati (Division of Surgery and Radiology, School of Veterinary Medicine and Biomedical Sciences, IPB University, Bogor)
Fitria Senja Murtiningrum (Division of Surgery and Radiology, School of Veterinary Medicine and Biomedical Sciences, IPB University, Bogor)
Leni Maylina (Division of Internal Medicine, School of Veterinary Medicine and Biomedical Sciences, IPB University, Bogor)
Havan Yusuf (Division of Veterinary Public Health and Epidemiology, School of Veterinary Medicine and Biomedical Sciences, IPB University, Bogor)
Arifin Budiman Nugraha (Division of Parasitology and Medical Entomology, School of Veterinary Medicine and Biomedical Sciences, IPB University, Bogor)
Amaq Fadholly (Division of Pharmacology and Toxicology, School of Veterinary Medicine and Biomedical Sciences, IPB University, Bogor)
Lina Noviyanti Sutardi (Sub-Division of Veterinary Pharmacy, School of Veterinary Medicine and Biomedical Sciences, IPB University, Bogor)
Aulia Andi Mustika (Division of Pharmacology and Toxicology, School of Veterinary Medicine and Biomedical Sciences, IPB University, Bogor)
Vera Nora Indra Astuti (Administration of School of Veterinary Medicine and Biomedical Sciences, IPB University, Bogor)
Zukhri Agusty Leo Syamsul Arifin (Administration of School of Veterinary Medicine and Biomedical Sciences, IPB University, Bogor)
Amrozi (Division of Reproduction and Obstetrics, School of Veterinary Medicine and Biomedical Sciences, IPB University, Bogor)

ARSHI Veterinary Letters
Vol. 10 No. 3 (2026): ARSHI Veterinary Letters - August 2026

Feline hypertrophic cardiomyopathy can remain clinically silent, complicating recognition in animals with limited medical histories. This report describes echocardiographic findings in an apparently healthy male domestic shorthair stray cat, estimated to be older than five years and weighing 4.6 kg. Unsedated B-mode, M-mode, and color Doppler examinations revealed left ventricular and papillary muscle thickening. The end-diastolic interventricular septal and posterior wall thicknesses were 6.0 and 8.7 mm, respectively. The device-reported ejection fraction and fractional shortening were 93% and 59%, respectively. Mild mitral leaflet thickening was observed without detectable regurgitation. These findings support a hypertrophic cardiomyopathy phenotype, but systemic hypertension and hyperthyroidism were not excluded because blood pressure and total thyroxine were not measured.