November 1, 1972Annals of Internal Medicine
Effect of Freeway Travel on Angina Pectoris
Why the study?
Does breathing freeway air during heavy traffic reduce exercise performance until angina in patients with angina?
Population
10 patients with angina
Comparison
Breathing freeway air while being driven for 90… vs Breathing compressed, purified air during…
Design
Other
Follow-up
2 hours after return
Authors
Discussion
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Member takes
Implication
May warrant advising angina patients to avoid heavy traffic; Level 5 evidence leaves open confirmation in controlled trials.
Structured PICO
Does breathing freeway air during heavy traffic reduce exercise performance until angina in patients with angina?
P
Population
10 patients with angina
I
Intervention
Breathing freeway air while being driven for 90 minutes during heavy morning freeway traffic
C
Comparator
Breathing compressed, purified air during freeway travel on a subsequent morning
O
Outcome
Exercise performance until anginasurrogate
Exposure to heavy freeway traffic increases carboxyhemoglobin levels and causes angina to develop sooner after less cardiac work.
Cite This Study
Wilbert S. Aronow (1972) studied this question.