Survival after coronary revascularization in the elderly

Area of Science:

• Cardiology
• Geriatric Medicine
• Clinical Outcomes Research

Background:

• Elderly patients with ischemic heart disease (IHD) are increasingly candidates for revascularization.
• Concerns exist regarding suboptimal outcomes in older adults undergoing coronary artery bypass grafting (CABG) or percutaneous coronary intervention (PCI).
• This study investigates survival rates across different treatment strategies in distinct elderly age groups.

Purpose of the Study:

• To compare the survival outcomes of elderly patients with ischemic heart disease based on their prescribed treatment.
• To analyze survival rates for coronary artery bypass grafting (CABG), percutaneous coronary intervention (PCI), and medical therapy across age strata.
• To determine if revascularization offers greater benefits in older patient populations.

Main Methods:

• Utilized data from the Alberta Provincial Project for Outcomes Assessment in Coronary Heart Disease (APPROACH) initiative.
• Compared characteristics and long-term outcomes of over 6000 elderly patients with IHD to younger cohorts.
• Analyzed 4-year adjusted actuarial survival rates for CABG, PCI, and medical therapy in patients aged <70, 70-79, and ≥80 years.

Main Results:

• In patients ≥80 years, 4-year survival was 77.4% for CABG, 71.6% for PCI, and 60.3% for medical therapy.
• Patients ≥80 years showed greater absolute risk reductions with CABG (17.0%) and PCI (11.3%) compared to medical therapy than younger patients.
• Survival rates for all treatments generally decreased with increasing age, but the benefit of revascularization over medical therapy was more pronounced in the oldest group.

Conclusions:

• Elderly patients, particularly those ≥80 years, experience paradoxically greater absolute risk reductions from revascularization (CABG/PCI) compared to younger individuals.
• Findings suggest that aggressive revascularization strategies may be highly beneficial for specific subsets of older patients with ischemic heart disease.
• These results, combined with prior trials, support considering revascularization for older patient populations.