Local delivery of heparin post-PTCA: a multicenter randomized pilot study

Area of Science:

• Interventional Cardiology
• Vascular Surgery
• Biomedical Engineering

Background:

• Bailout stenting is crucial for managing major dissections during percutaneous coronary intervention.
• High rates of ischemic complications are associated with bailout stenting, necessitating improved strategies.

Purpose of the Study:

• To evaluate the efficacy and safety of local heparin delivery via an infusion sleeve before bailout stenting.
• To assess if local heparin administration can mitigate ischemic complications in patients with suboptimal angioplasty results.

Main Methods:

• A randomized trial involving two phases was conducted.
• Phase I: 20 patients randomized to local heparin delivery at 40 or 100 psi.
• Phase II: 37 patients randomized to local heparin delivery at 100 psi versus standard therapy.

Main Results:

• Local heparin delivery was technically successful in most patients with no significant increase in intimal dissection.
• One patient experienced vessel perforation after stent placement with 100-psi infusion.
• No significant difference in the 30-day composite endpoint (death, MI, CABG, urgent repeat angioplasty, stent thrombosis) between groups (21% vs. 0%, P=0.18).
• At 6 months, myocardial infarction rates in Phase II were 27% for local delivery versus 10% for standard treatment (P=0.4).

Conclusions:

• Local heparin delivery in dissected vessels may be linked to increased complications.
• This technique should be approached with caution in interventional cardiology settings.
• Further research is needed to clarify the risks and benefits of local heparin delivery in bailout stenting.