A case-management system for coronary risk factor modification after acute myocardial infarction

Area of Science:

• Cardiology
• Preventive Medicine
• Health Services Research

Background:

• Coronary heart disease (CHD) management requires effective strategies for risk factor modification post-myocardial infarction (MI).
• Traditional care may not adequately address multiple risk factors in a coordinated manner.
• Home-based interventions can potentially improve patient adherence and outcomes.

Purpose of the Study:

• To assess the effectiveness of a physician-directed, nurse-managed, home-based case management system.
• To evaluate its impact on coronary risk factor modification in patients recovering from acute myocardial infarction.
• To compare this intervention against usual medical care.

Main Methods:

• A randomized clinical trial involving 585 patients (aged ≤70 years) hospitalized for acute MI across 5 Kaiser Permanente Medical Centers.
• Patients were assigned to either a special intervention group (n=293) or usual care (n=292).
• The intervention included hospital-initiated smoking cessation, exercise training, and diet-drug therapy for hyperlipidemia, followed by home-based telephone and mail contact.

Main Results:

• The intervention group achieved significantly higher cotinine-confirmed smoking cessation rates (70% vs. 53%, P=0.03).
• Plasma low-density lipoprotein cholesterol (LDL) levels were significantly lower in the intervention group (2.77 vs. 3.41 mmol/L, P=0.001).
• Functional capacity was significantly improved in the intervention group (9.3 vs. 8.4 METS, P=0.001).

Conclusions:

• A nurse-managed, home-based case management system is highly effective for coronary risk factor modification post-MI.
• This model of care demonstrates superior outcomes compared to usual medical care within a large health maintenance organization.
• The findings support the integration of such case management systems into routine cardiac care pathways.