Three-Dimensional Intravascular Ultrasound Assessment of Noninjured Edges of β-Irradiated Coronary Segments
Why the study?
Does catheter-based intracoronary beta-irradiation cause an edge effect (late lumen loss) in noninjured margins compared to a sham procedure?
Population
53 coronary vessels undergoing catheter-based intracoronary intervention
Comparison
Catheter-based intracoronary beta-irradiation vs Sham source (placebo)
Design
Cohort
Follow-up
6 to 8 months
Authors
Discussion
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Member takes
Implication
Observed edge lumen loss may reflect mechanical injury rather than radiation; challenges radiation-specific etiology and leaves open randomized confirmation.
Structured PICO
Does catheter-based intracoronary beta-irradiation cause an edge effect (late lumen loss) in noninjured margins compared to a sham procedure?
P
Population
53 coronary vessels undergoing catheter-based intracoronary intervention
I
Intervention
Catheter-based intracoronary beta-irradiation
C
Comparator
Sham source (placebo)
O
Outcome
Volumetric intravascular ultrasound measurements (lumen volume, plaque volume, total vessel volume) of noninjured edges at 6- to 8-month follow-upsurrogate
The edge effect occurs similarly in noninjured margins of both irradiated and placebo vessels, suggesting that mechanical device injury rather than low-dose radiation is the primary cause.
Cite This Study
Kozuma et al. (2000) studied this question.