http://scm.sagepub.com/content/59/4/182
- 1Final Year Medical Student, School of Medicine, University of Glasgow, Scotland
- 2Professor of Clinical Pharmacology, Institute of Cardiovascular and Medical Sciences, BHF Glasgow Cardiovascular Research Centre, Scotland
- Matthew R Walters, BHF Glasgow Cardiovascular Research Centre, 126 University Place, Glasgow, G12 8TA, UK. Email: Matthew.Walters@glasgow.ac.uk
Abstract
Introduction The
deep-fried Mars bar has been cited as ‘all that is wrong with the
high-fat, high-sugar Scottish diet’. We investigated
the effect of ingestion of a deep-fried Mars bar
or porridge on cerebrovascular reactivity. We hypothesised that
deep-fried
Mars bar ingestion would impair cerebrovascular
reactivity, which is associated with increased risk of ischaemic stroke.
Methods Twenty-four
fasted volunteers were randomised to receive a deep-fried Mars bar and
then porridge (control), or vice-versa.
We used transcranial Doppler ultrasound to
calculate Breath Holding Index as a surrogate? measure of cerebrovascular
reactivity.
Change in Breath Holding Index post-ingestion
was the primary outcome measure.
Results Twenty-four
healthy adults (mean (SD) age 21.5 (1.7) years, 14 males) completed the
protocol. Deep-fried Mars bar ingestion
caused a non-significant reduction in
cerebrovascular reactivity relative to control (mean difference in
absolute Breath Holding
Index after deep-fried Mars bar versus porridge
−0.11, p = 0.40). Comparison of the difference between the
absolute change in Breath Holding Index between genders demonstrated a
significant impairment of cerebrovascular
reactivity in males (mean difference women minus men of 0.65, 95% CI
0.30 to 1.00,
p = 0.0003).
Conclusion Ingestion
of a bolus of sugar and fat caused no overall difference in
cerebrovascular reactivity, but there was a modest
decrease in males. Impaired cerebrovascular
reactivity is associated with increased stroke risk, and therefore
deep-fried
Mars bar ingestion may acutely contribute to
cerebral hypoperfusion in men.
Charts at the link.
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