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Assessment of left ventricular size and function in horses using anatomical M-mode echocardiography


Grenacher, P A; Schwarzwald, C C (2010). Assessment of left ventricular size and function in horses using anatomical M-mode echocardiography. Journal of Veterinary Cardiology, 12(2):111-121.

Abstract

OBJECTIVE: To study the applicability of anatomical M-mode (AMM) for assessment of left ventricular (LV) size and function in horses, evaluate agreement with conventional M-mode (CMM), determine reliability, and establish reference intervals for AMM measurements.

ANIMALS: 98 horses; 13.1 +/- 5.6 years; 538 +/- 78 kg.

METHODS: Two-dimensional and M-mode recordings were analyzed retrospectively. Standard LV dimensions and indices of LV function, including time intervals, were measured in CMM and compared with AMM studies in long-axis (lx) and short-axis (sx) views.

RESULTS: The percentages of measureable cycles were 99%, 97%, and 90% for routine LV studies in CMM(sx), AMM(sx), and AMM(lx) mode. For time intervals, >or= 93% of cycles could be measured using AMM compared to a maximum of 77% using CMM. AMM(sx) measurements agreed well with CMM(sx) measurements for LV studies; the agreement of AMM(lx) with CMM(sx) was markedly lower. The LV ejection time and the duration of electromechanical systole, but not the LV pre-ejection period and the index of myocardial performance, showed fair agreement between methods. Intraobserver and interobserver measurement variabilities were low for most variables.

CONCLUSIONS: AMM can replace CMM for assessment of LV dimensions in horses, but is not recommended for measurement of time intervals

Abstract

OBJECTIVE: To study the applicability of anatomical M-mode (AMM) for assessment of left ventricular (LV) size and function in horses, evaluate agreement with conventional M-mode (CMM), determine reliability, and establish reference intervals for AMM measurements.

ANIMALS: 98 horses; 13.1 +/- 5.6 years; 538 +/- 78 kg.

METHODS: Two-dimensional and M-mode recordings were analyzed retrospectively. Standard LV dimensions and indices of LV function, including time intervals, were measured in CMM and compared with AMM studies in long-axis (lx) and short-axis (sx) views.

RESULTS: The percentages of measureable cycles were 99%, 97%, and 90% for routine LV studies in CMM(sx), AMM(sx), and AMM(lx) mode. For time intervals, >or= 93% of cycles could be measured using AMM compared to a maximum of 77% using CMM. AMM(sx) measurements agreed well with CMM(sx) measurements for LV studies; the agreement of AMM(lx) with CMM(sx) was markedly lower. The LV ejection time and the duration of electromechanical systole, but not the LV pre-ejection period and the index of myocardial performance, showed fair agreement between methods. Intraobserver and interobserver measurement variabilities were low for most variables.

CONCLUSIONS: AMM can replace CMM for assessment of LV dimensions in horses, but is not recommended for measurement of time intervals

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:05 Vetsuisse Faculty > Veterinary Clinic > Equine Department
Dewey Decimal Classification:570 Life sciences; biology
630 Agriculture
Language:English
Date:August 2010
Deposited On:01 Oct 2010 15:37
Last Modified:05 Apr 2016 14:13
Publisher:Elsevier
ISSN:1760-2734
Publisher DOI:https://doi.org/10.1016/j.jvc.2010.01.002
Related URLs:http://www.zora.uzh.ch/42954/
PubMed ID:20615777

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