Abstract
Catheterization of laboratory mice is commonly performed in biomedical research to infuse substances and for blood sampling. One approach is to catheterize the right common carotid artery and advance the catheter until the tip is positioned in the aorta or the proximal brachiocephalic trunk. Owing to the small body size of the mouse, a catheter tends to occupy a great part of even the larger vessel lumens, and this may increase vascular resistance with potential pathophysiological impacts on the heart. The present study compared cardiac function of catheterized mice, with catheter tip placement in the brachiocephalic trunk, with sham-operated mice and non-operated control mice. During four weeks post-catheterization, M-mode echocardiography measurements of the thickness of the left ventricular anterior wall, left ventricular inner diameter and the thickness of the left ventricular posterior wall were performed. The left ventricular volume, ejection fraction and fractional shortening were calculated. Moreover, aortic recordings of the thickness of the medial and lateral walls as well as the inner diameter were measured. Terminally, histological analysis of the hearts was conducted, and body weights and heart weights were compare...Continue Reading
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