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Proximal coronary artery intervention: stent thrombosis, restenosis and death

Fredrik Calais1, Bo Lagerqvist, Jerzy Leppert

  • 1Department of Cardiology, Örebro University Hospital, Örebro, Sweden.

International Journal of Cardiology
|November 12, 2013
PubMed

Insights

Percutaneous coronary intervention in the proximal left anterior descending artery (LAD) shows higher restenosis and stent thrombosis compared to the left circumflex artery (LCX). Drug-eluting stents (DES) in the LAD reduced restenosis and mortality versus bare metal stents (BMS).

Area of Science:

  • Cardiology
  • Interventional Cardiology
  • Biomedical Engineering

Background:

  • Percutaneous coronary intervention (PCI) in the proximal left anterior descending (LAD) artery may have worse outcomes than in the proximal right coronary artery (RCA) and left circumflex (LCX) arteries.
  • Understanding these differences is crucial for optimizing treatment strategies and patient prognosis.

Purpose of the Study:

  • To compare restenosis, stent thrombosis (ST), and mortality after PCI in the proximal LAD versus proximal RCA and LCX.
  • To evaluate the impact of stent type (bare metal stents [BMS] vs. drug-eluting stents [DES]) on these outcomes.

Main Methods:

  • Analysis of 7840 single-vessel proximal PCI procedures from the Swedish Coronary Angiography and Angioplasty Registry (SCAAR) between May 2005 and May 2011.
  • Comparison of restenosis, ST, and mortality rates between LAD, RCA, and LCX.
  • Stratification of outcomes based on stent type (BMS vs. DES).

Main Results:

  • No significant differences in restenosis or ST were observed between proximal LAD and proximal RCA.
  • Higher rates of restenosis and ST were found in the proximal LAD compared to the proximal LCX (restenosis HR 2.28, ST HR 2.32).
  • In the proximal LAD, DES implantation was associated with significantly lower restenosis (HR 0.39) and mortality (HR 0.58) compared to BMS; this benefit was not observed in the proximal RCA or LCX.

Conclusions:

  • Restenosis is more frequent following PCI in the proximal LAD compared to the proximal LCX.
  • Drug-eluting stent use in the proximal LAD is associated with reduced risks of restenosis and death compared to bare metal stents.
Abstract

Keywords:
AngioplastyCoronary artery diseaseDrug-eluting stents

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