Skeletal muscle ventricles: frontiers in 1995

Area of Science:

• Biomedical Engineering
• Cardiovascular Surgery
• Regenerative Medicine

Background:

• Heart failure remains a significant clinical challenge, necessitating advanced therapeutic strategies.
• Skeletal muscle ventricles (SMVs) offer a potential autologous solution for cardiac support.
• Electrically conditioned latissimus dorsi muscle (LDM) is a primary source for SMV construction.

Purpose of the Study:

• To evaluate the efficacy and safety of skeletal muscle ventricles (SMVs) for cardiac assistance.
• To explore various configurations of SMVs in left and right heart support.
• To assess the long-term performance and identify challenges in SMV application.

Main Methods:

• SMVs were constructed using electrically conditioned latissimus dorsi muscle (LDM).
• Diverse surgical configurations were employed for left and right heart circulatory assist.
• Animal models (acute and chronic) were utilized to test SMV function.
• Pericardial lining and modified connections were implemented to mitigate complications.

Main Results:

• Successful left and right heart circulatory assistance was achieved in animal models.
• One SMV demonstrated effective aortic counterpulsation for over 27 months.
• Recent design modifications reduced risks of thrombus formation and SMV rupture.

Conclusions:

• SMVs are a viable option for cardiac assistance, with proven efficacy in animal studies.
• Ongoing improvements in design and application are enhancing SMV safety and longevity.
• The development of SMVs as a permanent, externally powered circulatory assist device is approaching feasibility.