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- W160130927 abstract "We determined whether collagen implantation could thicken the infarcted left ventricular (LV) wall and improve LV function.We hypothesized that thickening the infarcted wall by using collagen might result in some benefits that are similar to what previously had been reported when the infarcted wall was thickened with cells.Fischer rats with one-week-old myocardial infarcts were injected with collagen or saline (100 microl) into the scar (n = 12 each group). Six weeks later, LV angiograms, hemodynamics, and regional myocardial blood flow were assessed. The hearts were processed for measurements of postmortem LV volume and histology.Collagen injection significantly increased scar thickness (719 +/- 26 microm) compared with the saline-treated group (440 +/- 34 microm, p = 2.6 x 10(-6)). By LV angiography, stroke volume was significantly larger in the collagen-treated group (163 +/- 8 microl) than in the saline-treated group (129 +/- 6 microl, p = 0.005), and LV ejection fraction was also greater in the collagen-treated group (48.4 +/- 1.8%) than in the saline-treated group (40.7 +/- 1.0%, p = 0.002). Analysis of regional wall motion demonstrated paradoxical systolic bulging in 5 of 10 saline-treated rats that averaged 20.3 +/- 2.6% of the LV diastolic circumference, but in none of the 11 collagen-treated rats (p = 0.012). The LV end-diastolic and end-systolic volumes were 319 +/- 12 microl and 190 +/- 7 microl in the saline-treated group, respectively. There was a trend for larger LV end-diastolic volumes (343 +/- 23 microl), but smaller end-systolic volumes (180 +/- 16 microl) in the collagen-treated group.This study shows that collagen injection thickens an infarct scar and improves LV stroke volume and ejection fraction, and prevents paradoxical systolic bulging after myocardial infarction." @default.
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- W160130927 date "2005-08-01" @default.
- W160130927 modified "2023-10-10" @default.
- W160130927 title "Thickening of the Infarcted Wall by Collagen Injection Improves Left Ventricular Function in Rats" @default.
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- W160130927 doi "https://doi.org/10.1016/j.jacc.2005.04.056" @default.
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