Systolic time intervals assessed by 2‐D echocardiography and spectral Doppler in the horse

Animal Science Journal - Tập 74 Số 6 - Trang 505-510 - 2003
C. Lightowler1, Giuseppe Piccione2, Francesco Fazio2, G. Pidal1, María Laura Cattáneo1
1Department of Medicine
2Department of Morphology, Biochemistry, Physiology and Animal Productions, Section of Veterinary Physiology, Faculty of Veterinary Medicine, University of Messina, Polo Universitario dell’Annunziata, Messina, Italy

Tóm tắt

ABSTRACTIn the present study, the ‘acoustic windows’ for the measurement of the left ventricular systolic time intervals is studied by means of 2‐D echocardiography and cardiac Doppler ultrasonography, and the normal values in the horse (n = 112) are determined. The left ventricular isovolumetric contraction time, the pre‐ejection period (PEP), as well as the left ventricular ejection time (LVET) have been measured, and the values of the left ventricular total electromechanical systole (LVTES) and the PEP‐to‐LVET ratio have been calculated. It has been established that the most suitable window for the measurement of the aforementioned indices in 2‐D echocardiography is the right parasternal window in a view in short axis at the level of the cardiac base to measure the aortogram. In Doppler ultrasonography, the preferred window is the left parasternal using the five chambers apical view. The following values have been acquired: PEP = 0.071 ± 0.01 s; LVET = 0.532 ± 0.097 s; LVTES = 0.6 ± 0.1 s and PEP‐to‐LVET = 0.138 ± 0.025 measured by 2‐D echocardiography and PEP = 0.068 ± 0.009 s; LVET = 0.527 ± 0.076 s; LVTES = 0.598 ± 0.098 s and PEP‐to‐LVET = 0.131 ± 0.01 measured by Doppler ultrasonography.

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Animal Science Journal

Tập 74 Số 6

505-510

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