Prognostic Impact of a Routine Six-Month Exercise Stress Test after Complex Left Main Bifurcation Percutaneous...

Area of Science:

• Cardiology
• Interventional Cardiology
• Clinical Outcomes Research

Background:

• The prognostic value of exercise stress testing post-complex left main (LM) coronary artery bifurcation stenting is not well-established.
• Complex LM bifurcation disease requires advanced stenting techniques, with implications for long-term patient outcomes.

Purpose of the Study:

• To evaluate the prognostic impact of a 6-month post-intervention exercise stress test in patients undergoing complex LM bifurcation stenting.
• To determine if exercise stress test results correlate with long-term clinical outcomes, including target lesion failure (TLF), stent thrombosis, and cardiovascular mortality.

Main Methods:

• Retrospective analysis of 502 patients with complex LM bifurcation disease treated between January 2008 and May 2018.
• Patients underwent either single- or dual-stenting techniques, with exercise stress tests performed 6 months post-procedure.
• Clinical outcomes were assessed at a mean follow-up of 37.1 months.

Main Results:

• A positive exercise stress test was observed in 8.4% of patients, with a 7.6% incidence of significant restenosis.
• Patients with a negative exercise stress test demonstrated significantly higher freedom from TLF (10.1% overall rate).
• Improved survival rates were observed in patients with negative exercise stress test results compared to those with positive results.

Conclusions:

• Exercise stress testing at 6 months provides valuable prognostic information after complex LM bifurcation stenting.
• A negative exercise stress test is associated with better long-term outcomes, including reduced target lesion failure and improved survival.
• This non-invasive test can aid in risk stratification and patient management following complex coronary interventions.