Conference
Innovative Epicardial Support: A Paradigm Shift in Myocardial Recovery and Heart Failure Therapy
المستخلص
Objective:
Heart transplantation remains the only option for patients with severe heart failure, despite significant advances in cardiac assist devices (CaAD) in recent years. Unfortunately, current CaADs do not provide a permanent treatment option due to the complications associated with direct blood contact, limiting their long-term use. To address this, we have developed a novel cardiac support system using an artificial muscle made from a dielectric elastomer membrane, designed to provide direct epicardial support during both systole and diastole. This study is the first to describe the feasibility and efficacy of this dielectric membrane-based pump unit in a live animal model.
Methods:
Cardiac infarction was induced in 4-week-old rats via temporary coronary artery occlusion for 20 minutes. In the experimental group, epicardial cardiac support was provided for 40 minutes with heart-synchronized assistance applying pressures of -5 mmHg during diastole and 40 mmHg during systole. The control group received no cardiac support, though the thorax was closed after the same 40-minute period in both groups. Postoperatively, the animals were monitored for 3 weeks with regular echocardiographic assessments. At the end of the 3 weeks, infarct size relative to total heart size was measured histologically.
Results:
In the group receiving epicardial cardiac support, there was a significant improvement in heart function observed at days 7 and 21, with an ejection fraction (EF) of 56% ± 8% compared to 48% ± 11% in the control group. Additionally, the infarct size was significantly reduced after 3 weeks, measuring 25% in the experimental group compared to 37% in the control group.
Conclusion:
Epicardial cardiac support using a dielectric elastomer membrane is an effective intervention, demonstrating significant functional improvement and a reduction in infarct size. This suggests that such an approach could interrupt the remodeling process and provide a viable long-term treatment for heart failure patients.
Heart transplantation remains the only option for patients with severe heart failure, despite significant advances in cardiac assist devices (CaAD) in recent years. Unfortunately, current CaADs do not provide a permanent treatment option due to the complications associated with direct blood contact, limiting their long-term use. To address this, we have developed a novel cardiac support system using an artificial muscle made from a dielectric elastomer membrane, designed to provide direct epicardial support during both systole and diastole. This study is the first to describe the feasibility and efficacy of this dielectric membrane-based pump unit in a live animal model.
Methods:
Cardiac infarction was induced in 4-week-old rats via temporary coronary artery occlusion for 20 minutes. In the experimental group, epicardial cardiac support was provided for 40 minutes with heart-synchronized assistance applying pressures of -5 mmHg during diastole and 40 mmHg during systole. The control group received no cardiac support, though the thorax was closed after the same 40-minute period in both groups. Postoperatively, the animals were monitored for 3 weeks with regular echocardiographic assessments. At the end of the 3 weeks, infarct size relative to total heart size was measured histologically.
Results:
In the group receiving epicardial cardiac support, there was a significant improvement in heart function observed at days 7 and 21, with an ejection fraction (EF) of 56% ± 8% compared to 48% ± 11% in the control group. Additionally, the infarct size was significantly reduced after 3 weeks, measuring 25% in the experimental group compared to 37% in the control group.
Conclusion:
Epicardial cardiac support using a dielectric elastomer membrane is an effective intervention, demonstrating significant functional improvement and a reduction in infarct size. This suggests that such an approach could interrupt the remodeling process and provide a viable long-term treatment for heart failure patients.
الكلمات المفتاحية
Epicardial Support
Cardiac Assist Devices (CaAD)
Dielectric Elastomer Membrane
Heart Failure Therapy
Myocardial Recovery
Artificial Muscle
Long-term Cardiac Support
