Heart Failure in Humans Reduces Contractile Force in Myocardium From Both Ventricles

This study measured how heart failure affects the contractile properties of the human myocardium from the left and right ventricles. The data showed that maximum force and maximum power were reduced by approximately 30% in multicellular preparations from both ventricles, possibly because of ventricu...

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Detalles Bibliográficos
Autores principales: Blair, Cheavar A., Brundage, Elizabeth A., Thompson, Katherine L., Stromberg, Arnold, Guglin, Maya, Biesiadecki, Brandon J., Campbell, Kenneth S.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier 2020
Materias:
CLINICAL RESEARCH
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7452203/
https://www.ncbi.nlm.nih.gov/pubmed/32875169
http://dx.doi.org/10.1016/j.jacbts.2020.05.014
Descripción
Sumario:This study measured how heart failure affects the contractile properties of the human myocardium from the left and right ventricles. The data showed that maximum force and maximum power were reduced by approximately 30% in multicellular preparations from both ventricles, possibly because of ventricular remodeling (e.g., cellular disarray and/or excess fibrosis). Heart failure increased the calcium (Ca(2+)) sensitivity of contraction in both ventricles, but the effect was bigger in right ventricular samples. The changes in Ca(2+) sensitivity were associated with ventricle-specific changes in the phosphorylation of troponin I, which indicated that adrenergic stimulation might induce different effects in the left and right ventricles.

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