Numerical Investigation of an Idealized
Overlapping Coronary Stents
Configuration
Alin Totorean, Iuliana-Claudia Totorean, Sandor Bernad, and Dan Gaita
Abstract Overlapping stents is a common occurrence during percutaneous coronary
interventions, the need for multiple stents frequently emerging from the complexity
of coronary lesions. Stent overlap has been associated with increased risk for stent
thrombosis and restenosis, irrespective of stent type. Altered hemodynamics at the
site of overlap has been linked to delayed stent endothelialization, incomplete strut
coverage or altered drug distribution, which trigger both thrombosis and restenosis.
This paper aims to describe to near-wall flow behavior in case of overlapping stents for
an idealized 2D stented coronary model, by analyzing the associated hemodynamic
parameters: WSS distribution and recirculation zones and pressure distribution.
1 Introduction
Stent overlap is a relatively frequent technique used during percutaneous coronary
interventions (PCI) and stent placement, with up to 30% of the patients that undergo
PCI being treated with overlapping stents [1, 2].
Stent overlap has been defined as the use of ≥2 stents for a single coronary lesion,
with a minimum 1 mm zone with overlapping stent struts. Reasons for using this
technique may include: excessive lesion length, incomplete lesion coverage, proximal
or distal dissection following stent implantation [1, 2].
A. Totorean
Politehnica University of Timisoara, No 1 Mihai Viteazul Street, 300222 Timisoara, Romania
I.-C. Totorean (B) · D. Gaita
University of Medicine and Pharmacy Victor Babes Timisoara, No 2 Eftimie Murgu Square,
Timisoara, Romania
e-mail: claudia_hudrea@yahoo.com
Cardiology Department, Institute for Cardiovascular Diseases, Timisoara, Romania
S. Bernad
Romanian Academy—Timisoara Branch, No 24 Mihai Viteazul Street, 300223 Timisoara,
Romania
© Springer Nature Switzerland AG 2021
N. Herisanu and V. Marinca (eds.), Acoustics and Vibration of Mechanical
Structures—AVMS 2019, Springer Proceedings in Physics 251,
https://doi.org/10.1007/978-3-030-54136-1_24
251
Overlapping Coronary Stents
Configuration
Alin Totorean, Iuliana-Claudia Totorean, Sandor Bernad, and Dan Gaita
Abstract Overlapping stents is a common occurrence during percutaneous coronary
interventions, the need for multiple stents frequently emerging from the complexity
of coronary lesions. Stent overlap has been associated with increased risk for stent
thrombosis and restenosis, irrespective of stent type. Altered hemodynamics at the
site of overlap has been linked to delayed stent endothelialization, incomplete strut
coverage or altered drug distribution, which trigger both thrombosis and restenosis.
This paper aims to describe to near-wall flow behavior in case of overlapping stents for
an idealized 2D stented coronary model, by analyzing the associated hemodynamic
parameters: WSS distribution and recirculation zones and pressure distribution.
1 Introduction
Stent overlap is a relatively frequent technique used during percutaneous coronary
interventions (PCI) and stent placement, with up to 30% of the patients that undergo
PCI being treated with overlapping stents [1, 2].
Stent overlap has been defined as the use of ≥2 stents for a single coronary lesion,
with a minimum 1 mm zone with overlapping stent struts. Reasons for using this
technique may include: excessive lesion length, incomplete lesion coverage, proximal
or distal dissection following stent implantation [1, 2].
A. Totorean
Politehnica University of Timisoara, No 1 Mihai Viteazul Street, 300222 Timisoara, Romania
I.-C. Totorean (B) · D. Gaita
University of Medicine and Pharmacy Victor Babes Timisoara, No 2 Eftimie Murgu Square,
Timisoara, Romania
e-mail: claudia_hudrea@yahoo.com
Cardiology Department, Institute for Cardiovascular Diseases, Timisoara, Romania
S. Bernad
Romanian Academy—Timisoara Branch, No 24 Mihai Viteazul Street, 300223 Timisoara,
Romania
© Springer Nature Switzerland AG 2021
N. Herisanu and V. Marinca (eds.), Acoustics and Vibration of Mechanical
Structures—AVMS 2019, Springer Proceedings in Physics 251,
https://doi.org/10.1007/978-3-030-54136-1_24
251