Myocardial torsional deformations in cats with hypertrophic cardiomyopathy using two-dimensional speckle-tracking echocardiography

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• 作者：R. Suzuki ; DVM ; PhD ; ^{ryoheisuzuki0130@gmail.com" class="auth_mail" title="E-mail the corresponding author} ; Y. Mochizuki ; DVM ; H. Yoshimatsu ; DVM ; T. Ohkusa ; DVM ; T. Teshima ; DVM ; PhD ; H. Matsumoto ; DVM ; PhD ; H. Koyama ; DVM ; PhD
• 关键词：Feline ; Myocardium ; Rotation ; Torsion ; Systolic function
• 刊名：Journal of Veterinary Cardiology
• 出版年：2016
• 出版时间：December 2016
• 年：2016
• 卷：18
• 期：4
• 页码：350-357
• 全文大小：578 K

文摘

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.