Absent post-ischemic increase of blood flowmotion in the cutaneous microcirculation of healthy chronic cigarette smokers.

Abstract:

:The aim of the study was to investigate whether chronic cigarette smoke habit is associated with changes of laser Doppler (LD) skin blood flowmotion (SBF). We performed spectral analysis of skin forearm LD signal detected by a LD flowmetry (Periflux PF4, Perimed, Sweden) before and during forearm post-ischemic hyperaemia, in 14 healthy chronic smoker subjects and 14 age and sex matched nonsmoker subjects. Forearm skin ischemia was obtained by a pneumatic cuff, positioned at the right arm and inflated for 3 minutes to 30 mmHg above systolic blood pressure. Power spectral density (PSD) of the SBF total spectrum (0.009-1.6 Hz), as well as 0.009-0.02 Hz , 0.02-0.06 Hz, 0.06-0.2 Hz, 0.2-0.6 Hz and 0.6-1.6 Hz frequency intervals (FI), referred to endothelial, sympathetic, myogenic, respiratory and heart activity, respectively, were measured in LD conventional perfusion units (PU)/Hz. Smokers showed a basal SBF total spectrum PSD mean values not significantly different from nonsmokers (2.14+/-1.58 PU/Hz and 1.93+/-1.35 PU/Hz, respectively). Following ischemia, PSD mean value of SBF total spectrum, as well of five FI considered, significantly increased in nonsmokers (p<0.01), while it did not significantly change in smokers. Smokers and nonsmokers did not differ in basal and post-ischemic skin LD perfusion mean values. The absent post-ischemic increase of the SBF and of its FI related to endothelial and myogenic activity in smokers can be an early sign of skin microcirculatory impairment, suggesting an endothelial and smooth muscle skin microvascular dysfunction associated with the chronic smoking habit.

authors

Rossi M,Carpi A,Di Maria C,Galetta F,Santoro G

subject

Has Abstract

pub_date

2007-01-01 00:00:00

pages

163-71

issue

2

eissn

1386-0291

issn

1875-8622

journal_volume

36

pub_type

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