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Systolic and diastolic myocardial dysfunction in cats with hypertrophic cardiomyopathy or systemic hypertension

Carolina Carlos Sampedrano1, Valérie Chetboul, Vassiliki Gouni

  • 1Unité de Cardiologie d'Alfort, Ecole Nationale Vétérinaire d'Alfort, Maisons-Alfort, France.

Journal of Veterinary Internal Medicine
|October 27, 2006
PubMed

Insights

Tissue Doppler imaging detects similar myocardial dysfunction in cats with hypertrophic cardiomyopathy (HCM) and systemic hypertension (SHT)-induced left-ventricular hypertrophy (LVH). This dysfunction occurs even in non-hypertrophied segments, aiding disease understanding.

Area of Science:

  • Veterinary Cardiology
  • Echocardiography
  • Feline Heart Disease

Background:

  • Hypertrophic cardiomyopathy (HCM) and systemic hypertension (SHT) are common causes of left-ventricular hypertrophy (LVH) in cats.
  • Assessing LVH-associated myocardial dysfunction is crucial for understanding feline heart disease pathophysiology.

Purpose of the Study:

  • To quantify left-ventricular free-wall (LVFW) motion using tissue Doppler imaging (TDI).
  • To differentiate feline HCM from SHT-related LVH (LVH-SHT) using TDI-derived LVFW motion parameters.

Main Methods:

  • Echocardiography and 2D color TDI were performed on 108 cats (35 HCM, 17 LVH-SHT, 56 controls).
  • Analysis focused on radial and longitudinal diastolic and systolic LVFW velocities.

Main Results:

  • Both HCM and LVH-SHT groups showed similar alterations in diastolic LVFW velocities compared to controls.
  • Systolic dysfunction was observed in longitudinal motion for both hypertrophy groups, but not radial motion.
  • Diastolic dysfunction was present in non-hypertrophied segments in both HCM and LVH-SHT cats.

Conclusions:

  • LVFW motion alterations are similar in cats with HCM and LVH-SHT.
  • TDI can detect systolic and diastolic functional changes in non-hypertrophied segments.
  • These findings highlight TDI's utility in evaluating myocardial dysfunction in feline cardiac diseases.
Abstract

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