Coronary Stent Healing in Cancer Patients-An Optical Coherence Tomography Perspective

Area of Science:

• Cardiovascular Medicine
• Oncology
• Interventional Cardiology

Background:

• Cancer treatments can negatively impact stent healing and increase thrombosis risk, particularly with early discontinuation of dual antiplatelet therapy (DAPT).
• Optical coherence tomography (OCT) offers detailed assessment of stent healing and endothelialization, crucial for managing cancer patients with drug-eluting stents (DES).

Purpose of the Study:

• To evaluate stent healing patterns using OCT in cancer patients post-DES implantation.
• To determine cardiovascular outcomes and overall survival (OS) in this patient cohort.
• To explore the relationship between stent healing, cancer characteristics, and survival.

Main Methods:

• Retrospective analysis of 67 cancer patients who underwent OCT for vascular healing assessment after DES placement (Nov 2009 - Nov 2018).
• Primary endpoints included stent coverage, apposition, expansion, neointimal hyperplasia heterogeneity, restenosis, thrombosis, and OS.
• Comparison of stent healing with published data from non-cancer patients.

Main Results:

• Stent healing in cancer patients was comparable to non-cancer patients (P ≥ 0.063).
• One-year OS was 86% with 0% acute coronary syndrome incidence.
• Advanced cancer and active chemotherapy were linked to poorer OS (P=0.024, P=0.026), but stent healing parameters did not correlate with OS.
• 61% of patients had DAPT duration ≤6 months.

Conclusions:

• Contemporary DES show similar healing patterns in cancer and non-cancer patients.
• Cardiovascular risk management in cancer patients post-DES is feasible, allowing for concurrent cancer treatment.
• Patient survival is primarily dictated by the malignancy and chemotherapy regimen, rather than stent healing status.