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Relationship between heart rate and minute ventilation, tidal volume and respiratory rate during brief and low level exercise.

The correlation between heart rate (HR) and three respiratory parameters, minute ventilation (VE), tidal volume (Vt), and respiratory rate (RR), were studied. Four healthy subjects performed four exercise tests (duration 30 seconds at 50, 100, 150, or 200 W), in random order. Cardio-respiratory para...

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Published in:Pacing & Clinical Electrophysiology Vol. 11; no. 11; pp. 1860 - 1866
Main Authors: Vai F, Bonnet JL, Ritter P, Pioger G
Format: Journal Article
Published: Wiley-Blackwell Nov1988
Online Access:View this record in EBSCOhost
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      dt: Nov1988
      vid: 11
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      pub: Wiley-Blackwell
      place: Malden, Massachusetts
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        atl: Relationship between heart rate and minute ventilation, tidal volume and respiratory rate during brief and low level exercise.
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          Vai F
          Bonnet JL
          Ritter P
          Pioger G
      sug:
      ab: The correlation between heart rate (HR) and three respiratory parameters, minute ventilation (VE), tidal volume (Vt), and respiratory rate (RR), were studied. Four healthy subjects performed four exercise tests (duration 30 seconds at 50, 100, 150, or 200 W), in random order. Cardio-respiratory parameters were recorded respiratory cycle by respiratory cycle. The results of these low level exercise tests showed that oxygen consumption (VO2) was strongly correlated with VE (r = 0.91 ± 0.10; P < 0.01) (except in one test) and Vt (r =0.91 ± 0.07; P < 0.001) (except in one test). There was no significant correlation between VO2 and RR. At exercise onset HR, VE, and Vt were modified in a matter of a few heart beats while RR varied depending on the subject and the level of exercise. During exercise average HR, VE, and Vt were significantly higher than at rest in most cases; but RR was not significantly changed by exercise. The correlations between HR and VE, Vt and RR varied from one individual to another. Nevertheless, the correlation coefficients were positive for VE and Vt, while they were negative for RR. Sensing respiratory rate thus appears to be insufficient for responsive pacing ot exercise onset, but sensing respiratory volumes (Vt, VE) should give satisfactory results.
      pubtype: Academic Journal
      doctype: Journal Article
      ougenre: Article
    language: English
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