Key result
Microneurovascular muscle transplantation preserves ~70% of maximum isometric tension and improves fatigue resistance vs controls.
Why the study?
Little data is available on the functional and structural changes after simple transposition of the latissimus dorsi muscle to the thoracic wall compared to transplantation.
Does microneurovascular muscle transplantation or transposition better preserve muscle function and morphology for potential myocardial repair?
Does microneurovascular muscle transplantation or transposition better preserve muscle function and morphology for potential myocardial repair?
Microneurovascular muscle transplantation preserves isometric tension and fatigue resistance better than simple transposition, supporting its potential utility for myocardial repair.
Supports preclinical development for myocardial repair; leaves open translation to clinical use.
Muscle homograft transplantation and transposition have been performed to the heart, yet little data is available on the functional and structural changes after "simple transposition" of the latissimus dorsi (LD) muscle to the thoracic wall. Our aim was to compare the results of transplantation and transposition of the same muscle under experimental conditions. Five LD muscles were transposed to the anterior thoracic wall on an intact neurovascular pedicle. Five LD muscles were transplanted to the rectus femoris muscle site in the leg with microvascular techniques. Five control LD muscles were examined morphologically and functionally. The force measurements displayed a significant reduction in both experimental groups compared to control. The nearly 70% preservation of maximum isometric tension and the higher resistance to fatigue in the transplant support the concept of microneurovascular muscle transplantation to the heart. The experimental data also indicate that LD transpositions experience a significant reduction in force and mean fiber area despite an intact neural support.
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Paul J. Guelinckx (1991) studied Experimental muscle transplantation (n=15). Muscle transplantation and transposition vs. Control latissimus dorsi muscles was evaluated on Force measurements and morphological changes. Microneurovascular muscle transplantation preserved nearly 70% of maximum isometric tension and showed higher resistance to fatigue, despite significant force reduction compared to controls.
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