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Updated: Mar 16, 2026
Transthoracic Speckle Tracking Echocardiography for the Quantitative Assessment of Left Ventricular Myocardial Deformation
Published on: October 20, 2016
Myocardial torsional deformations in cats with hypertrophic cardiomyopathy using two-dimensional speckle-tracking
R Suzuki1, Y Mochizuki1, H Yoshimatsu1
1Laboratory of Veterinary Internal Medicine, Division of Therapeutic Sciences 1, Department of Veterinary Clinical Medicine, Faculty of Veterinary Medicine, Nippon Veterinary and Life Science University, 1-7-1 Kyonan-cho, Musashino-shi, Tokyo, 180-8602, Japan.
Insights
Systolic torsional deformations were quantitatively measured in cats with hypertrophic cardiomyopathy (HCM). Cats with HCM showed higher peak systolic apical rotation and torsion compared to controls, indicating potential use in evaluating compensatory myocardial function.
Area of Science:
- Cardiology
- Veterinary Medicine
- Biomedical Engineering
Background:
- Hypertrophic cardiomyopathy (HCM) is a common cardiac disease in cats.
- Understanding myocardial mechanics in HCM is crucial for diagnosis and management.
- Systolic torsional deformation is a key indicator of left ventricular function.
Purpose of the Study:
- To quantitatively measure systolic torsional deformations in cats with hypertrophic cardiomyopathy (HCM).
- To compare these deformations between cats with HCM and healthy controls.
- To assess the utility of these measurements in evaluating HCM-related myocardial function.
Main Methods:
- Two-dimensional speckle-tracking echocardiography was used to assess myocardial deformations.
- Measurements included peak systolic rotation, rotation rate, torsion, and torsion rate.
- Cats were categorized into HCM (asymptomatic/symptomatic, obstructive/non-obstructive) and control groups.
Main Results:
- Cats with HCM exhibited higher peak systolic apical rotation and torsion than controls.
- Obstructive HCM cases showed significantly increased rotation and torsion parameters compared to controls.
- These findings suggest altered myocardial mechanics in feline HCM.
Conclusions:
- Two-dimensional speckle-tracking echocardiography can effectively assess myocardial torsional deformations in cats.
- Elevated torsional parameters in HCM cats may represent a compensatory mechanism.
- These quantitative measures may aid in the evaluation of compensatory myocardial function in feline HCM.
Objectives:
The objective of our study was to quantitatively measure systolic torsional deformations in cats with hypertrophic cardiomyopathy (HCM) and in controls.
Animals:
Twenty-six client-owned cats with HCM and 14 healthy cats. HCM cats were categorized based on their symptoms (asymptomatic and symptomatic) and with or without left ventricular outflow tract obstruction (obstructive and non-obstructive).
Methods:
The cats were examined for myocardial deformations using two-dimensional speckle-tracking echocardiography and were evaluated for peak systolic rotation and the rotation rate at each basal and apical view. Cats were also evaluated for the peak systolic torsion and torsion rate.
Results:
The peak systolic apical rotation and torsion were higher in asymptomatic and symptomatic cats with HCM than in control cats. Also, the peak systolic apical rotation, apical rotation rate, torsion, and torsion rate were higher in cats with obstructive HCM than in control cats.
Conclusions:
Myocardial torsional deformations assessed by two-dimensional speckle-tracking echocardiography may be useful for evaluating compensatory myocardial function of HCM.
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