Passive containment and reverse remodeling by a novel textile cardiac support device

Area of Science:

• Cardiology
• Biomedical Engineering
• Regenerative Medicine

Background:

• Chronic heart failure involves progressive cardiac remodeling and dilation, leading to myocardial dysfunction.
• Preclinical studies suggest passive cardiac constraint devices can promote reverse remodeling and improve cardiac function.
• This study investigates the potential benefit of a cardiac constraint device for stable heart failure patients (NYHA class II-III).

Purpose of the Study:

• To evaluate the safety and feasibility of the Acorn Cardiac Support Device (CSD) in patients with stable chronic heart failure.
• To assess the impact of CSD implantation on cardiac function, ventricular remodeling, and clinical status.
• To determine the device's effect on symptoms and quality of life in heart failure patients.

Main Methods:

• A prospective safety and feasibility study involving 27 stable heart failure patients (NYHA class II-III).
• The Acorn Cardiac Support Device (CSD), a textile polyester device, was surgically implanted around the heart.
• Patients were monitored for clinical status, echocardiographic parameters (ejection fraction, ventricular dimensions), and mitral valve regurgitation.

Main Results:

• All 27 patients survived surgery with smooth recovery.
• Within three months, 56% of patients improved to NYHA class I, and 33% to class II.
• Echocardiography revealed improved left ventricular ejection fraction (22% to 33%) and reduced end-diastolic dimension (74 mm to 65 mm).
• Mitral valve regurgitation decreased significantly, and quality of life indices improved.

Conclusions:

• CSD implantation appears to be safe and feasible in the short-to-intermediate term.
• The device demonstrates potential to ameliorate symptoms and improve cardiac and functional performance in heart failure patients.
• Worldwide randomized trials are ongoing to further validate these findings.