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Skeletal muscle ventricles: full versus half aortic ligation
1Division of Cardiothoracic Surgery, Wayne State University School of Medicine, Detroit, Michigan, USA.
Journal of Cardiac Surgery
|May 4, 1999
Summary
Skeletal muscle ventricles effectively support aortic diastolic counterpulsation. However, full aortic ligation resulted in better survival rates compared to partial ligation in this canine model.
Area of Science:
- Biomedical Engineering
- Cardiovascular Research
- Surgical Innovation
Background:
- Skeletal muscle ventricles have demonstrated efficacy in experimental aortic diastolic counterpulsation.
- Previous models required full ligation of the thoracic aorta.
Purpose of the Study:
- To investigate the effectiveness of skeletal muscle ventricles for counterpulsation without complete aortic ligation.
- To compare outcomes between full and partial aortic ligation models.
Main Methods:
- Two groups of dogs (n=10 each) underwent skeletal muscle ventricle construction.
- Group 1: Full thoracic aortic ligation. Group 2: 50% aortic narrowing.
- Animals were monitored for 10 weeks.
Main Results:
- No significant difference in femoral diastolic augmentation between groups at 10 weeks (p=0.502).
- Significantly higher survival rates in the full ligation group (9/10) versus the half ligation group (4/10) (p=0.019).
- Two animals in the half ligation group survived with effective augmentation and no thrombus.
Conclusions:
- Both full and partial aortic ligation models provide effective diastolic counterpulsation.
- Full aortic ligation demonstrated superior survival rates.
- Further design modifications may enable effective counterpulsation without complete aortic ligation.