Mid-term clinical outcomes and cardiac function in patients receiving cardiac contractility modulation

Area of Science:

• Cardiology
• Biomedical Engineering
• Medical Devices

Background:

• Cardiac Contractility Modulation (CCM) is an emerging therapy for systolic heart failure (NYHA class III, EF 25-45%).
• The impact of CCM on diastolic dysfunction and weight changes remains largely unexplored.
• Understanding CCM's broad clinical effects is crucial for optimizing heart failure management.

Purpose of the Study:

• To evaluate the mid-term clinical and functional outcomes of CCM therapy in an urban heart failure population.
• To assess CCM's effects on New York Heart Association (NYHA) class, hospitalizations, ejection fraction (EF), and diastolic function (DD).
• To investigate the influence of CCM on patient weight.

Main Methods:

• Retrospective review of 31 consecutive patients who received CCM implants.
• Comparison of pre- and post-CCM implant data for NYHA class, hospitalizations, EF, DD, and weight.
• Statistical analysis to determine the significance of observed changes.

Main Results:

• Significant improvement in NYHA class (0.97 classes, p<0.001) and 68% of patients showed improvement.
• Reduced mean annualized hospitalizations (0.8 vs. 0.4/year, p=0.048) and days hospitalized (p<0.001 after outlier exclusion).
• Mean EF increased by 8% (p=0.002), DD improved by 0.8 grades (p<0.001), and patients lost an average of 4% body weight (p=0.002).

Conclusions:

• CCM therapy demonstrated significant mid-term benefits in an urban heart failure cohort.
• Improvements were observed across multiple clinical parameters including functional class, cardiac function, and weight.
• The findings support CCM as a valuable therapeutic option for select heart failure patients.