title: Myocardial torsional deformations in cats with hypertrophic cardiomyopathy using two-dimensional speckle-tracking echocardiography.
abstract: OBJECTIVE
  The objective of our study was to quantitatively measure systolic torsional deformations in cats with hypertrophic cardiomyopathy (HCM) and in controls.
  
  
  METHODS
  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.
authors: Laboratory 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. Electronic address: ryoheisuzuki0130@gmail.com.
authors: R
authors: R
authors: Suzuki
authors: Laboratory 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.
authors: Y
authors: Y
authors: Mochizuki
authors: Laboratory 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.
authors: H
authors: H
authors: Yoshimatsu
authors: Laboratory 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.
authors: T
authors: T
authors: Ohkusa
authors: Laboratory 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.
authors: T
authors: T
authors: Teshima
authors: Laboratory 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.
authors: H
authors: H
authors: Matsumoto
authors: Laboratory 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.
authors: H
authors: H
authors: Koyama
mesh_terms: D000818:Animals; D002312:Cardiomyopathy, Hypertrophic / Q000473:pathology* / Q000503:physiopathology; D002371:Cat Diseases / Q000473:pathology* / Q000503:physiopathology; D002415:Cats; D004452:Echocardiography / Q000379:methods / Q000662:veterinary*; D005260:Female; D008297:Male; D009206:Myocardium / Q000473:pathology*; D018487:Ventricular Dysfunction, Left / Q000662:veterinary
keywords: Feline; Myocardium; Rotation; Systolic function; Torsion