Sökning: WFRF:(Hvidtfeldt M.)
> (2015) >
Cardiac output duri...
Cardiac output during exercise: A comparison of four methods
-
Siebenmann, C. (författare)
-
Rasmussen, P. (författare)
-
Sorensen, H. (författare)
-
visa fler...
-
Zaar, M. (författare)
-
Hvidtfeldt, M. (författare)
-
Pichon, A. (författare)
-
Secher, N. H. (författare)
-
- Lundby, Carsten (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för kost- och idrottsvetenskap,Department of Food and Nutrition, and Sport Science
-
visa färre...
-
(creator_code:org_t)
- 2014-03-20
- 2015
- Engelska.
-
Ingår i: Scandinavian Journal of Medicine & Science in Sports. - : Wiley. - 0905-7188. ; 25:1
- Relaterad länk:
-
https://gup.ub.gu.se...
-
visa fler...
-
https://doi.org/10.1...
-
visa färre...
Abstract
Ämnesord
Stäng
- Several techniques assessing cardiac output (Q) during exercise are available. The extent to which the measurements obtained from each respective technique compares to one another, however, is unclear. We quantified Q simultaneously using four methods: the Fick method with blood obtained from the right atrium (Q(Fick-M)), Innocor (inert gas rebreathing; Q(Inn)), Physioflow (impedance cardiography; Q(Phys)), and Nexfin (pulse contour analysis; Q(Pulse)) in 12 male subjects during incremental cycling exercise to exhaustion in normoxia and hypoxia (FiO2=12%). While all four methods reported a progressive increase in Q with exercise intensity, the slopes of the Q/oxygen uptake (VO2) relationship differed by up to 50% between methods in both normoxia [4.9 +/- 0.3, 3.9 +/- 0.2, 6.0 +/- 0.4, 4.8 +/- 0.2L/min per L/min (mean +/- SE) for Q(Fick-M), Q(Inn), Q(Phys) and Q(Pulse), respectively; P=0.001] and hypoxia (7.2 +/- 0.7, 4.9 +/- 0.5, 6.4 +/- 0.8 and 5.1 +/- 0.4L/min per L/min; P=0.04). In hypoxia, the increase in the Q/VO2 slope was not detected by Nexfin. In normoxia, Q increases by 5-6L/min per L/min increase in VO2, which is within the 95% confidence interval of the Q/VO2 slopes determined by the modified Fick method, Physioflow, and Nexfin apparatus while Innocor provided a lower value, potentially reflecting recirculation of the test gas into the pulmonary circulation. Thus, determination of Q during exercise depends significantly on the applied method.
Ämnesord
- MEDICIN OCH HÄLSOVETENSKAP -- Medicinska och farmaceutiska grundvetenskaper -- Fysiologi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Basic Medicine -- Physiology (hsv//eng)
Nyckelord
- Inert gas rebreathing
- impedance cardiography
- pulse contour analysis
- hypoxia
- maximal oxygen
- IMPEDANCE CARDIOGRAPH DEVICE
- GAS REBREATHING TECHNIQUE
- MAXIMAL AEROBIC
- EXERCISE
- HEART-FAILURE PATIENTS
- BLOOD-FLOW
- NONINVASIVE MEASUREMENT
- RECIRCULATION TIME
- ARTERIAL-PRESSURE
- STROKE VOLUME
- LEG EXERCISE
- Sport Sciences
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
Hitta via bibliotek
Till lärosätets databas