Question · Q4 2025
Lawrence Biegelsen inquired whether Boston Scientific is observing any impact on Watchman sales from recent trials (CLOSURE-AF, AF, Ocean) and asked CMO Kenneth Stein about the key endpoints physicians will focus on for the upcoming Champion trial, particularly regarding similar rates of ischemic and hemorrhagic stroke.
Answer
CMO Kenneth Stein unequivocally stated that Boston Scientific has not seen any impact on Watchman uptake from the CLOSURE-AF, AF, and Ocean trials, noting robust growth in Watchman and concomitant procedures. Regarding the Champion trial, he mentioned two co-primary endpoints: non-inferiority for a combined endpoint of stroke, systemic embolism, and death, and a superiority endpoint for bleeding, both of which are expected to be important to the field.
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