Assertion: isthmus | /r/HasProperty | encountered with change
Facets:
value: in surgical technique
type: OTHER
value: less frequently
type: DEGREE
Source sentences:
text: However, this isthmus was often absent secondary to a transannular incision or avoidance of RVOT incision altogether, and it is likely that with changes in surgical technique this isthmus will be encountered even less frequently with time.4,6