Key result
Surgical repair of an ostial stenosis in an internal thoracic artery graft resulted in a more than 2-fold increase in both diastolic and systolic velocities and velocity time integral.
Case Report (n=1)
No
Effect estimate: more than 2-fold increase
Unlike distal stenosis, ostial stenosis of an internal thoracic artery graft reduces both systolic and diastolic flow velocities proportionally, meaning standard diagnostic criteria like diastolic fraction are not indicative of ostial stenosis.
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Ostial ITA stenosis may evade standard diastolic-fraction criteria; this case leaves open validation of velocity thresholds in larger cohorts.
Yoshitatsu et al. (2005) conducted a case report in Ostial stenosis of internal thoracic artery graft (n=1). Surgical repair of proximal stenosis vs. Pre-repair (baseline) was evaluated on Doppler flow profiles (velocities and velocity time integral) (more than 2-fold increase). Surgical repair of an ostial stenosis in an internal thoracic artery graft resulted in a more than 2-fold increase in both diastolic and systolic velocities and velocity time integral.
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