Author + information
- Myong Hwa Yamamoto,
- Sung Sik Kim,
- Akiko Maehara,
- Kohei Koyama,
- Colin Berry,
- Keith Oldroyd,
- Gary Mintz and
- Margaret McEntegart
Background: Impact of rotational atherectomy (RA) on stent expansion is not fully understood.
Method: We compared low, intermediate, and high Ca Index ([maximum superficial Ca angle/360] × [Ca length/lesion length]) tertiles assessed by IVUS of post RA. Reverberations with a concave-shaped lumen close to the guidewire were considered as RA-related Ca modification.
Results: Post-stent newly visible peri-vascular tissues through a pre-stent solid arc of Ca (suggesting calcium fracture) was more frequent in high Ca Index (Table and Figure). More post-RA reverberations were found in lesions with a smaller post-RA lumen area. Minimum stent area was similar irrespective of the Ca Index severity.
Conclusions: Greater Ca modification by RA occurs in severely calcified lesions to mitigate against stent underexpansion.
Poster Hall, Hall C
Saturday, March 18, 2017, 9:45 a.m.-10:30 a.m.
Session Title: Interventional Cardiology: Stent Failure Analysis by Intravascuar Imaging
Abstract Category: 23. Interventional Cardiology: IVUS and Intravascular Physiology
Presentation Number: 1193-138
- 2017 American College of Cardiology Foundation