Related Experiment Video
Updated: Aug 2, 2026

A Murine Model of Stent Implantation in the Carotid Artery for the Study of Restenosis
Published on: May 14, 2013
Sirolimus-eluting stents associated with paradoxic coronary vasoconstriction
Mario Togni1, Stephan Windecker, Rosangela Cocchia
1Swiss Cardiovascular Center Bern, Bern, Switzerland.
Sirolimus-eluting stents (SES) did not impair exercise-induced vasodilation in adjacent coronary arteries. However, SES implantation caused paradoxical vasoconstriction in these segments, suggesting drug-induced endothelial dysfunction.
Area of Science:
- Cardiovascular research
- Interventional cardiology
- Endothelial function
Background:
- Sirolimus-eluting stents (SES) effectively reduce restenosis.
- Long-term impact of sirolimus on endothelial function remains unclear.
Purpose of the Study:
- To evaluate coronary vasomotor response to exercise following SES implantation.
- To compare endothelial function in patients treated with SES versus bare-metal stents (BMS).
Main Methods:
- Coronary vasomotion assessed using quantitative angiography during exercise.
- 25 patients with coronary artery disease studied 6 months post-intervention.
- 11 patients received BMS (control), 14 received SES for de novo lesions.
Main Results:
- Reference vessels showed exercise-induced vasodilation in both groups.
- Stented segments exhibited abolished vasomotion.
- SES group showed paradoxical vasoconstriction in adjacent segments (-12% to -15%), unlike BMS group (+15% to +17%).
Conclusions:
- Bare-metal stents do not affect exercise-induced vasomotor response in adjacent segments.
- Sirolimus-eluting stents are linked to exercise-induced paradoxical vasoconstriction in adjacent segments.
- Maintained nitroglycerin response suggests drug-induced endothelial dysfunction as the mechanism.
More Related Videos
08:13Mitigation of Blood Borne Cell Attachment to Metal Implants through CD47-Derived Peptide Immobilization
Published on: December 3, 2020
13:48Reduction of Radiation Exposure during Endovascular Treatment of Peripheral Arterial Disease Combining Fiber Optic RealShape Technology and Intravascular Ultrasound
Published on: April 21, 2023
Related Concept Videos
Heart Failure Drugs: Inhibitors of Renin-Angiotensin System
Antiplatelet Drugs: Prostaglandin Synthesis, P2Y12 and Glycoprotein IIb/IIIa Inhibitors
Prostaglandin synthesis inhibitors, exemplified by the widely known aspirin, wield their power by irreversibly acetylating...
Treatment for Pulmonary Arterial Hypertension: Endothelin Receptor Antagonists
ETs are synthesized through a complex sequence of enzymatic steps, primarily involving an enzyme referred to as endothelin-converting enzyme (ECE). Of...
Treatment for Pulmonary Arterial Hypertension: Prostacyclin Receptor Agonists
These agonists bind to the IPR receptor situated on the plasma membrane of the pulmonary artery smooth muscle cells. This binding triggers a cascade of reactions known as the GS-AC-cAMP-PKA pathway. This pathway results in the relaxation of smooth muscle...
Mitral Stenosis III: Medical Management
Peripheral Artery Disease III: Interprofessional Care