Percutaneous coronary intervention provided better long term results than optimal medical therapy alone in patients...

Area of Science:

• Cardiovascular Medicine
• Interventional Cardiology
• Clinical Outcomes Research

Background:

• Chronic total occlusion (CTO) management often involves percutaneous coronary intervention (PCI) alongside optimal medical therapy (OMT), but comparative long-term outcome data are limited.
• Existing studies on PCI+OMT versus OMT alone for CTO have design limitations, including observational data, variable follow-up, and high patient drop-out or cross-over rates.

Purpose of the Study:

• To conduct a comprehensive meta-analysis of both observational and randomized studies.
• To compare the long-term clinical outcomes of PCI plus OMT versus OMT alone in patients with CTO.

Main Methods:

• Systematic review of PubMed, Embase, and Cochrane databases.
• Inclusion of 15 studies, with quality appraisal using the Newcastle Ottawa scale.
• Random-effects model with inverse variance method to analyze data on major adverse cardiovascular events (MACE), mortality, and revascularization.

Main Results:

• PCI+OMT significantly reduced MACE (cardiac death, myocardial infarction, stroke, unplanned revascularization) compared to OMT alone (RR: 0.76; 95% CI: 0.61-0.95).
• All-cause mortality and cardiac death were significantly lower in the PCI+OMT group (P<0.00001 for both).
• While myocardial infarction and stroke rates were lower with PCI+OMT, they did not reach statistical significance. Unplanned revascularization rates were similar between groups.

Conclusions:

• Percutaneous coronary intervention for CTO, when combined with optimal medical therapy, leads to improved long-term outcomes.
• Key benefits include a reduction in major adverse cardiovascular events, all-cause mortality, and cardiac death.
• The rates of unplanned revascularization remain comparable between the PCI+OMT and OMT alone strategies.