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Exerc Sci > Volume 11(2); 2002 > Article
Exercise Science 2002;11(2): 453-465.
전투조종사의 비행활동이 좌심실 수축력 및 심장 벡터에 미치는 영향
Ko, S.K. The Effects of the Combat Flight on the Left ventricular Contractility and Cardiac Vector of the Air Force Pilots. Exercise Science, 11(2): 453-466, 2002. To study the effects of the combat flight on the left ventricular contractility and cardiac vector of the Air Force pilots, 153 pilots and 27 Air Force Academy cadets were selected and they were classified into six groups by flight time(FT). To evaluate the LV contractility of subjects, M-mode echocardiography, ECG and impedance cardiography were recorded simultaneously, and then shortening and ejection fraction by echocardiography, R amplitude of chest V1, V5, V6 lead by ECG, and R-Z interval by impedance cardiography were analyzed. To evaluate the cardiac vector, mean QRS vector of Ⅰ, Ⅲ, V2, V6 lead were recorded by ECG. Measured data were compared among the group using oneway ANOVA. As a results, SBP were decreased against FT, but HR and RPP had no constant tendency. In cardiac contractility factors, SV1, SV1+RV5, RV6/RV5 of ECG, R-Z interval of impedance cardiography and ejection fraction of echocardiography were decreased against FT. In cardiac vector, axis of frontal plane was deviated to left side by FT, but axis of horizontal plan has no constant tendency. Vector amplitude of frontal and horizontal plane were decreased by FT.
ally, these results indicate that cardiac function of fighter pilots seem to degenerated by FT, and suggest that pilots have to increase their cardiovascular fitness by the physical training.
Key words: combat pilots, ventricular contractility, cardiac vector
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