Abstract
Objective: To investigate whether the time rate of change in heart rate i.e. cardiac acceleration, during aerobic exercise in human subjects could be used to differentiate vagal withdrawal from sympathetic stimulation. Methods: Fifteen male subjects exercised on a bicycle ergometer at 50 Watts (Step 1), then 100 Watts (Step 2), for 2 minutes each. Results: Heart rate (HR) was monitored from a resting value (mean ± SD) of 80.3 ± 12.9 to 113. 6 ± 13.6 beats min-1 in Step 1. In Step 2 exercise, HR increased from 113.8 ± 13.6 to 145 ± 20 beats min-1. At the initiation of Step 1, a rapid acceleration of HR was observed in the form of an overshoot response. In contrast to Step 1, a small overshoot response of cardiac acceleration was observed during Step 2. The difference between the mean cardiac acceleration at 10 seconds in Steps 1 and 2 was significant (2.40 ± 0.19 and 0.71 ± 0.12 beats min-1 sec-1, p
| Original language | English |
|---|---|
| Pages (from-to) | 375-378 |
| Number of pages | 4 |
| Journal | Journal of the Pakistan Medical Association |
| Volume | 53 |
| Issue number | 8 |
| Publication status | Published - 2003 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Medicine(all)
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Cardiac acceleration as a marker of vagal withdrawal in heart rate control during exercise in humans. / Bokharil, S. S I; Ahmad, H. R.; Subhan, M. M F; Ali, S. A.; Kahan, M. N.
In: Journal of the Pakistan Medical Association, Vol. 53, No. 8, 2003, p. 375-378.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Cardiac acceleration as a marker of vagal withdrawal in heart rate control during exercise in humans
AU - Bokharil, S. S I
AU - Ahmad, H. R.
AU - Subhan, M. M F
AU - Ali, S. A.
AU - Kahan, M. N.
PY - 2003
Y1 - 2003
N2 - Objective: To investigate whether the time rate of change in heart rate i.e. cardiac acceleration, during aerobic exercise in human subjects could be used to differentiate vagal withdrawal from sympathetic stimulation. Methods: Fifteen male subjects exercised on a bicycle ergometer at 50 Watts (Step 1), then 100 Watts (Step 2), for 2 minutes each. Results: Heart rate (HR) was monitored from a resting value (mean ± SD) of 80.3 ± 12.9 to 113. 6 ± 13.6 beats min-1 in Step 1. In Step 2 exercise, HR increased from 113.8 ± 13.6 to 145 ± 20 beats min-1. At the initiation of Step 1, a rapid acceleration of HR was observed in the form of an overshoot response. In contrast to Step 1, a small overshoot response of cardiac acceleration was observed during Step 2. The difference between the mean cardiac acceleration at 10 seconds in Steps 1 and 2 was significant (2.40 ± 0.19 and 0.71 ± 0.12 beats min-1 sec-1, p
AB - Objective: To investigate whether the time rate of change in heart rate i.e. cardiac acceleration, during aerobic exercise in human subjects could be used to differentiate vagal withdrawal from sympathetic stimulation. Methods: Fifteen male subjects exercised on a bicycle ergometer at 50 Watts (Step 1), then 100 Watts (Step 2), for 2 minutes each. Results: Heart rate (HR) was monitored from a resting value (mean ± SD) of 80.3 ± 12.9 to 113. 6 ± 13.6 beats min-1 in Step 1. In Step 2 exercise, HR increased from 113.8 ± 13.6 to 145 ± 20 beats min-1. At the initiation of Step 1, a rapid acceleration of HR was observed in the form of an overshoot response. In contrast to Step 1, a small overshoot response of cardiac acceleration was observed during Step 2. The difference between the mean cardiac acceleration at 10 seconds in Steps 1 and 2 was significant (2.40 ± 0.19 and 0.71 ± 0.12 beats min-1 sec-1, p
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UR - http://www.scopus.com/inward/citedby.url?scp=0141459812&partnerID=8YFLogxK
M3 - Article
VL - 53
SP - 375
EP - 378
JO - JPMA. The Journal of the Pakistan Medical Association
JF - JPMA. The Journal of the Pakistan Medical Association
SN - 0030-9982
IS - 8
ER -