Cited by 394Smoking Behavior and CessationHeart Rate Variability and Autonomic ControlBlood Pressure and Hypertension Studies

Mechanisms responsible for sympathetic activation by cigarette smoking in humans.

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Grassi, G, Seravalle, G, Calhoun, D A, Bolla, G B, Giannattasio, C, Marabini, M, Del Bo, A, Mancia, G·1994·Circulation

Abstract

BACKGROUND: The pressor and tachycardic effects of cigarette smoking are associated with an increase in plasma catecholamines, suggesting the dependence of these effects on adrenergic stimulation. Whether the stimulation occurs at a central or a peripheral level and whether reflex mechanisms are involved is unknown. METHODS AND RESULTS: In nine normotensive healthy subjects (age, 33.0 +/- 3.5 years, mean +/- SEM), we measured blood pressure (Finapres device), heart rate (ECG), calf blood flow and vascular resistance (venous occlusion plethysmography), plasma norepinephrine and epinephrine (high-performance liquid chromatography assay), and postganglionic muscle sympathetic nerve activity (microneurography from the peroneal nerve) while subjects were smoking a filter cigarette (nicotine content, 1.1 mg) or were in control condition. Cigarette smoking (which raised plasma nicotine measured by high-performance liquid chromatography from 1.0 +/- 0.9 to 44.2 +/- 7.1 ng/mL) markedly and significantly increased mean arterial pressure (+13.2 +/- 2.3%), heart rate (+30.3 +/- 4.7%), calf vascular resistance (+12.1 +/- 4.9%), plasma norepinephrine (+34.8 +/- 7.0%), and plasma epinephrine (+90.5 +/- 39.0%). In contrast, muscle sympathetic nerve activity showed a marked reduction (integrated activity -31.8 +/- 5.1%, P < .01). The reduction was inversely related to the increase in mean arterial pressure (r = -.67, P < .05), but the slope of the relation was markedly less (-54.1 +/- 7.5%, P < .05) than that obtained by intravenous infusion of phenylephrine in absence of smoking. The hemodynamic and neurohumoral changes were still visible 30 minutes after smoking and occurred again on smoking a second cigarette. Sham smoking was devoid of any hemodynamic and neurohumoral effect. CONCLUSIONS: These data support the hypothesis that in humans the sympathetic activation induced by smoking depends on an increased release and/or a reduced clearance of catecholamines at the neuroeffector junctions. Central sympathetic activity is inhibited by smoking, presumably via a baroreceptor stimulation triggered by the smoking-related pressor response. The baroreflex is impaired by smoking, however, indicating that partial inability to reflexly counteract the effect of sympathetic activation is also responsible for the pressor response.

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Authors
Grassi, G., Seravalle, G., Calhoun, D. A., Bolla, G. B., Giannattasio, C., Marabini, M., Del Bo, A., & Mancia, G.
Affiliations
  • Azienda Ospedaliera San Gerardo (IT)
  • Cattedra Medicina Interna, Ospedale S. Gerardo dei Tintori, Monza, Italy.
Venue
Circulation
Published
1994-07
Volume
90
Issue
1
Pages
248-253
ISSN
  • 0009-7322 (ISSN-L)
  • 1524-4539
OpenAlex
W2034576097
Cited by
394
References
0
Citations by year
2026: 11 · 2025: 7 · 2024: 11 · 2023: 7 · 2022: 9 · 2021: 15 · 2020: 16 · 2019: 12 · 2018: 12 · 2017: 10 · 2016: 14 · 2015: 12 · 2014: 13 · 2013: 26 · 2012: 16
FWCI
4.53
Type
journal article
Language
en
Open access
Locations
  • Circulation (publishedVersion)
  • PubMed (publishedVersion)
  • BOA (University of Milano-Bicocca) (submittedVersion)
Funders
  • National Institutes of Health (5k11hl002568-05, 5k08hl003220-02)
  • National Heart, Lung, and Blood Institute (HL 03220, HL02568)
Topics
  • Health Sciences › Medicine › Physiology › Smoking Behavior and Cessation
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Heart Rate Variability and Autonomic Control
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Blood Pressure and Hypertension Studies
Keywords
cigarette smoking, sympathetic nervous system, baroreflex, baroreflex sensitivity, plasma catecholamines, norepinephrine, epinephrine, muscle sympathetic nerve activity, blood pressure, heart rate, vascular resistance, nicotine, hemodynamic response, reflex mechanisms, phenylephrine infusion, normotensive subjects
MeSH terms
Adult, Blood Pressure, Female, Heart Rate, Humans, Male, Middle Aged, Muscles, Norepinephrine, Phenylephrine, Smoking, Sympathetic Nervous System

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