CORRELATION BETWEEN INFLECTION OF HEART RATE/WORK PERFORMANCE CURVE AND MYOCARDIAL-FUNCTION IN EXHAUSTING CYCLE ERGOMETER EXERCISE

被引:42
作者
POKAN, R
HOFMANN, P
PREIDLER, K
LEITNER, H
DUSLEAG, J
EBER, B
SCHWABERGER, G
FUGER, GF
KLEIN, W
机构
[1] GRAZ UNIV,DEPT SPORTS SCI,A-8036 GRAZ,AUSTRIA
[2] GRAZ UNIV,DEPT RADIOL,A-8036 GRAZ,AUSTRIA
[3] GRAZ UNIV,DEPT PHYSIOL,A-8036 GRAZ,AUSTRIA
来源
EUROPEAN JOURNAL OF APPLIED PHYSIOLOGY AND OCCUPATIONAL PHYSIOLOGY | 1993年 / 67卷 / 05期
关键词
CYCLE ERGOMETRY; MYOCARDIAL FUNCTION; LEFT VENTRICULAR EJECTION FRACTION; RADIONUCLIDE VENTRICULAR SCINTIGRAPHY; INFLECTION OF HEART RATE/PERFORMANCE CURVE;
D O I
10.1007/BF00376453
中图分类号
Q4 [生理学];
学科分类号
071003 [生理学];
摘要
The heart rate/work performance (f(c)/W) curve is usually S-shaped but a flattening at the top is not always seen. By means of radionuclide Ventricular scintigraphy, the left ventricular ejection fraction (LVEF) of 15 sports students was investigated. The behaviour of the f(c)/W curve during cycle ergometry with increasing exercise intensities was examined. During exercise, the LVEF showed a distinct initial increase reaching roughly constant values at stress levels below-maximum, and sometimes even falling again. The inflections of the f(c)/W curve and left ventricular ejection fraction/performance curve (LVEFPC) were calculated from a second degree polynomial fit. From this function, the slopes of the tangents at the points of aerobic threshold and maximum performance were calculated together with the differences of the angles as a measure of the f(c)/W curve and LVEFPC inflections. It follows that the f(c)/W curve inflection became less pronounced or was even absent altogether when the decrease in LVEF towards the end of the ergometer exercise became more distinct. A significant negative correlation was found between the existence and extent of the f(c)/W curve inflection and the stress-dependent myocardial function, expressed as the inflection of the LVEFPC (P<0.01, r=0.673). Thus, it would seem that the absence of a f(c)/W curve inflection was related to a diminished stress-dependent myocardial function.
引用
收藏
页码:385 / 388
页数:4
相关论文
共 18 条
[1]
BUNC V, 1989, Medizin und Sport (Berlin), V29, P75
[2]
Kinetics of heart rate responses to exercise [J].
Bunc, Vaclav ;
Heller, Jan ;
Leso, Jiri .
JOURNAL OF SPORTS SCIENCES, 1988, 6 (01) :39-48
[3]
BUNC VJ, 1992, SPORTS MED TRAINING, V3, P87, DOI DOI 10.1080/15438629209517005
[4]
RARITY OF PRECLINICAL ALCOHOLIC CARDIOMYOPATHY IN CHRONIC-ALCOHOLICS LESS-THAN-40 YEARS OF AGE [J].
CERQUEIRA, MD ;
HARP, GD ;
RITCHIE, JL ;
STRATTON, JR ;
WALKER, RD .
AMERICAN JOURNAL OF CARDIOLOGY, 1991, 67 (02) :183-187
[5]
CLINICAL AND HEMODYNAMIC SIGNIFICANCE OF LEFT-VENTRICULAR DIASTOLIC VOLUME CHANGES BY EXERCISE RADIONUCLIDE VENTRICULOGRAPHY IN CORONARY-ARTERY DISEASE [J].
CHOI, BW ;
WASSERMAN, AG ;
KATZ, RJ ;
VARMA, V ;
REBA, RC ;
ROSS, AM .
AMERICAN JOURNAL OF CARDIOLOGY, 1989, 63 (09) :522-525
[6]
DETERMINATION OF THE ANAEROBIC THRESHOLD BY A NON-INVASIVE FIELD-TEST IN RUNNERS [J].
CONCONI, F ;
FERRARI, M ;
ZIGLIO, PG ;
DROGHETTI, P ;
CODECA, L .
JOURNAL OF APPLIED PHYSIOLOGY, 1982, 52 (04) :869-873
[7]
GAISL G, 1987, INT J SPORTS MED, V8, P41
[8]
GAISL G, 1991, CHILDREN EXERCISE PE, V15, P234
[9]
HECK H, 1989, Deutsche Zeitschrift fuer Sportmedizin, V40, P388
[10]
Israel S., 1982, SPORT HERZSCHLAGFREQ