Effect of Scar Compaction on the Therapeutic Efficacy of Anisotropic Reinforcement Following Myocardial Infarction in the Dog
| Autor: | Samantha A. Clarke, Norman C. Goodman, Jeffrey W. Holmes, Gorav Ailawadi |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
medicine.medical_specialty
Myocardial Infarction Pharmaceutical Science Hemodynamics Scars Acute infarcts Article Cicatrix Ventricular Dysfunction Left Dogs Internal medicine Genetics medicine Animals Myocardial infarction cardiovascular diseases Cardiac Surgical Procedures Ventricular remodeling Reinforcement Ligation Genetics (clinical) Lv function Ventricular Remodeling business.industry Recovery of Function medicine.disease Biomechanical Phenomena Disease Models Animal Anesthesia Cardiology cardiovascular system Molecular Medicine medicine.symptom Cardiology and Cardiovascular Medicine business |
| Popis: | Cardiac restraint devices have been used following myocardial infarction (MI) to limit left ventricular (LV) dilation, although isotropic restraints have not been shown to improve post-MI LV function. We have previously shown that anisotropic reinforcement of acute infarcts dramatically improves LV function. This study examined the effects of chronic, anisotropic infarct restraint on LV function and remodeling. Hemodynamics, infarct scar structure, and LV volumes were measured in 28 infarcted dogs (14 reinforced, 14 control). Longitudinal restraint reduced 48hr LV volumes, but no differences in LV volume, function, or infarct scar structure were observed after 8 weeks of healing. All scars underwent substantial compaction during healing; we hypothesize that compaction negated the effects of restraint therapy by mechanically unloading the restraint device. Our results lend support to the concept of adjustable restraint devices, and suggest that scar compaction may explain some of the variability in published studies of local infarct restraint. |
| Databáze: | OpenAIRE |
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