Peer-reviewed veterinary case report
Heart tissue changes in cats with early hypertrophic cardiomyopathy
By Fries, Ryan C et al.·Published in Journal of veterinary internal medicine·2021·Department of Veterinary Clinical Medicine, United States·View original on PubMed →
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Original publication title: Cardiac extracellular volume fraction in cats with preclinical hypertrophic cardiomyopathy.
- Species:
- cat
Plain-English summary
Twelve cats with early signs of hypertrophic cardiomyopathy (HCM) were studied to see how their heart structure compared to healthy cats. The tests showed that the cats with HCM had thicker heart walls and higher levels of certain heart measurements, indicating changes in heart function. These findings suggest that advanced imaging techniques can help detect heart issues in cats before they show obvious symptoms. This information could be useful for veterinarians in monitoring and managing heart health in cats at risk for HCM.
People also search for: cat heart disease symptoms · hypertrophic cardiomyopathy in cats · cat heart health monitoring
Abstract
BACKGROUND: Cardiac magnetic resonance imaging (CMR) allows for detection of fibrosis in hypertrophic cardiomyopathy (HCM) by quantification of the extracellular volume fraction (ECV). HYPOTHESIS/OBJECTIVES: To quantify native T1 mapping and ECV in cats. We hypothesize that native T1 mapping and ECV will be significantly increased in HCM cats compared with healthy cats. ANIMALS: Seventeen healthy and 12 preclinical HCM, age-matched, client-owned cats. METHODS: Prospective observational study. Tests performed included indirect blood pressure, CBC, biochemical analysis including total thyroid, urinalysis, transthoracic echocardiogram, and CMR. Cats were considered healthy if all tests were within normal limits and a diagnosis of HCM was determined by the presence of left ventricular concentric hypertrophy ≥6 mm on echocardiography. RESULTS: There were statistically significant differences in LV mass (healthy = 5.87 g, HCM = 10.3 g, P < .0001), native T1 mapping (healthy = 1122 ms, HCM = 1209 ms, P = .004), and ECV (healthy = 26.0%, HCM = 32.6%, P < .0001). Variables of diastolic function including deceleration time of early diastolic transmitral flow (DTE), ratio between peak velocity of early diastolic transmitral flow and peak velocity of late diastolic transmitral flow (E : A), and peak velocity of late diastolic transmitral flow (A wave) were significantly correlated with ECV (DTE; r = 0.73 P = .007, E : A; r = -0.75 P = .004, A wave; r = 0.76 P = .004). CONCLUSIONS AND CLINICAL IMPORTANCE: Quantitative assessment of cardiac ECV is feasible and can provide additional information not available using echocardiography.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/33634479/