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Response of end tidal CO2 pressure to impulse exercise


, : Response of end tidal CO2 pressure to impulse exercise. Acta Physiologica Hungarica 101(1): 103-111

The purpose of the present study was to examine how end tidal CO(2) pressure (PETCO(2)) is controlled in impulse exercise. After pre-exercise at 25 watts for 5 min, impulse exercise for 10 sec with 200 watts followed by post exercise at 25 watts was performed. Ventilation (VE) significantly increased until the end of impulse exercise and significantly re-increased after a sudden decrease. Heart rate (HR) significantly increased until the end of impulse exercise and then decreased to the pre-exercise level. PETCO(2) remained constant during impulse exercise. PETCO(2) significantly increased momentarily after impulse exercise and then significantly decreased to the pre-exercise level. PETCO(2) showed oscillation. The average peak frequency of power spectral density in PETCO(2) appeared at 0.0078 Hz. Cross correlations were obtained after impulse exercise. The peak cross correlations between VE and PETCO(2), HR and PETCO(2), and VE and HR were 0.834 with a time delay of -7 sec, 0.813 with a time delay of 7 sec and 0.701 with a time delay of -15 sec, respectively. We demonstrated that PETCO(2) homeodynamics was interactively maintained by PETCO(2) itself, CO(2) transportation (product of cardiac output and mixed venous CO(2) content) into the lungs by heart pumping and CO(2) elimination by ventilation, and it oscillates as a result of their interactions.

US$19.90

PMID: 24311228

DOI: 10.1556/APhysiol.100.2013.018


Other references

Rutecka-Bonin, I., 1975: Lipolytic activity of Staphylococci and Micrococci. Acta Microbiologica Polonica. Series B: Microbiologia Applicata 7(1): 37-43

Deng, M.; Zhou, X.; Gao, S.; Yang, S-Gui.; Wang, B.; Chen, H-Zhong.; Ruan, B., 2013: The effects of telbivudine in late pregnancy to prevent intrauterine transmission of the hepatitis B virus: a systematic review and meta-analysis. Chronic hepatitis B virus (HBV) infection poses a serious public health problem in many parts of the world. Presently, even with proper joint immunoprophylaxis, approximately 10-15% of newborns from HBV carrier mothers suffer from HBV infection th...

Kazantsev, D.; Arridge, S.R.; Pedemonte, S.; Bousse, A.; Erlandsson, K.; Hutton, B.F.; Ourselin, Sébastien., 2012: An anatomically driven anisotropic diffusion filtering method for 3D SPECT reconstruction. In this study, we aim to reconstruct single-photon emission computed tomography images using anatomical information from magnetic resonance imaging as a priori knowledge about the activity distribution. The trade-off between anatomical and emissio...

Schulte Steinberg O., 1984: Regional anesthesia for children. Annales Chirurgiae et Gynaecologiae 73(3): 158-165

Vogel, K.P.; Johnson, V.A.; Mattern, P.J., 1975: Reevaluation of common wheats from the USDA world wheat collection for protein and lysine content. Over 600 wheats were selected from the USDA World Wheat Collection representing the range of protein and lysine content existing among common wheats, and were grown at Yuma, Arizona in 1972 and 1973. In multiple regression analysis, only 10% of th...

Sharpe, J.C.; Bisgard, J.D., 1936: The relation of the thyroid gland to hematopoiesis. 1. Experimental total thyroidectomy in tho rabbit. Haematologic observations on 4 normal rabbits and 4 rabbits after complete thyroidectomy, showed that a moderate and persistent anaemia of the macrocytic type developed after the removal of the thyroid gland. There was a very slight transient decr...

Speyer., 1870: The following changes take place in Setina ramosa at a considerable altitude:-1, the size diminishes. The following changes take place in Setina ramosa at a considerable altitude:-1, the size diminishes; 2, the covering of the body is rougher and more matted, from the hair becoming longer and thicker; 3, in proportion to the thickening of the cove...

Harrison, P.R.; Brown, J.; Mcgregor, F.; Wagner, E.; Parkinson, E.K.; Campo, S.; Soutar, D.; Felix, D., 1998: Differential effect of flavonoids on growth and invasion of primary cultures of human oral lesions during cancer progression. Proceedings of the American Association for Cancer Research Annual Meeting 39: 288, March

de Liefde, B., 1998: The decline of caries in New Zealand over the past 40 years. In New Zealand, as elsewhere, caries prevalence has declined since the 1950s; this has been accompanied by a change in the intra-oral pattern of the disease. This is illustrated by analysis of data for 12-year-old children. However, because treatm...

Azimov, S.A.; Kataitseva, T.V., 1984: Sources and routes of helminth infections of cattle on farming complexes in the Samarkand region. The helminthological status of 3 cattle farms of the Samarkand region, USSR, is described. Overall, helminths were recorded in 38.3% of cattle. Haemonchus and Marshallagia were the dominant species with prevalences of 8.6 and 5.3% resp. and averag...