ISSN:
1432-1041
Keywords:
nifedipine
;
plasma adrenaline
;
plasma noradrenaline
;
exercise
;
blood pressure
;
heart rate
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
,
Medicine
Notes:
Summary Blood pressure, heart rate, and plasma catecholamine concentrations were measured in 9 normotensive volunteers during a randomized cross-over study of oral nifedipine (10 mg×5) and placebo; measurements were made at rest and during maximal anaerobic exercise. At rest nifedipine reduced blood pressure and increased heart rate and plasma noradrenaline, whereas plasma adrenaline did not change. During exercise, the blood pressure response was similar in nifedipine and placebo treated subjects; however, heart rate was significantly higher with nifedipine. Plasma noradrenaline increased more during exercise in nifedipine-treated subjects. By contrast, nifedipine inhibited the increase in plasma adrenaline induced by exercise. The results suggest that peripheral vasodilatation induced by nifedipine is responsible for increased sympathetic nerve activity, both at rest and during exercise, and that nifedipine inhibits adrenaline secretion in man.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00608224
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