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. 2022 Sep;46(3):823-836.
doi: 10.1007/s11259-022-09907-6. Epub 2022 Mar 8.

Tissue motion annular displacement to assess the left ventricular systolic function in healthy cats

Giovana Lais Ruviaro Tuleski  1 , Marcela Wolf  2 , Maria Jose Garcia Ribeiro Pscheidt  3 , Júlio Pereira Dos Santos  2 , Marlos Gonçalves Sousa  2
Affiliations

Tissue motion annular displacement to assess the left ventricular systolic function in healthy cats

Giovana Lais Ruviaro Tuleski et al. Vet Res Commun. 2022 Sep.

Abstract

The tissue motion annular displacement (TMAD) measures the longitudinal displacement of the mitral annulus during systole, using speckle-tracking echocardiography (STE). The main objective was to determine the TMAD means in healthy cats, exploring the correlations with systolic surrogates. The influence of age, body surface area (BSA), heart rate, and systemic blood pressure on the indices was also analyzed. One hundred ninety-three healthy, client-owned cats participated in this prospective, cross-sectional observational study undergoing conventional and STE. Apical four-chamber (AP4) and two-chamber (AP2) images were recorded for offline calculations. Mean TMAD values were similar to mitral annulus plane systolic excursion (MAPSE), varying between 4 to 4.8 mm depending on the annulus and image used. No significant differences between age and BSA categories were detected, except for AP4 MP%, reduced in the heavier group. TMAD variables showed moderate correlation with longitudinal strain (LSt) and MAPSE, but not with fraction shortening (FS) and ejection fraction (EF). The median time required for the offline calculation was 12.2 s for AP4 and 11.8 s for AP2. The technique showed moderate inter and intraobserver variation, proving a reliable tool for assessing left ventricular longitudinal systolic function in cats.

Keywords: Longitudinal function; Reference range; Speckle tracking; Strain.

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