Bu çal›flmada ‹ngiliz ›rk› yar›fl (n:30) ve konkur (n:30) atlar›nda M-mod ekokardiografi tekni¤i kullan›larak, mitral kapak, sol ventrikül volüm ve kontraktibilite kriterleri araflt›r›ld›. Yüzde kas›lma (% FS), yüzde f›rlatma gücü (% EF) ve sirkumferensiyal fibril k›salma h›z› (Vcf) her üç transduser pozisyonunda; mitral kapak amplitüd ve slop ölçümleri transduser III pozisyonunda; sol ventrikül volüm ölçümleri transduser I, II ve III pozisyonlar›nda ölçülerek ortalamalar› al›nd›. Mitral kapak CE ve DE amplitüdlerinde yar›fl ve konkur atlar› aras›nda P<0.05 düzeyinde istatistiksel anlaml›l›k saptand›. DE ve EF - sloplar ile volüm (EDV, ESV, SV) ve miyokardial kontraktibilite kriterlerinde ( % FS, % EF, Vcf) gruplar aras›nda istatistiksel yönden anlaml› bir farkl›l›k saptanamad›.

In this study, mitral valves, left ventricle volume and myocardial contractibility indices in English racing (n:30) and show-jumping horses (n:30) were investigated using M-mode echocardiography. The percentages of fractional shortening (% EF), ejection fraction (% EF), and the mean velocity of circumferential shortening (Vcf) were determined on each of three transducer positions. Mitral valve amplitude and slope measurements on transducer III position and left ventricle volume measurements on transducer I, II and III positions were taken and the average of all measurements were calculated. A significant difference between the amplitude of CE and DE of the mitral valvle in racing and show-jumping horses was found (P