Preservation of Myocardial Perfusion and Function by Keeping Hypertrophied Heart Empty and Beating for Valve Surgery: An In Vivo MR Study of Pig Hearts

Figure 1

The aortic stenosis produced by banding the ascending aorta. (a) Aortic narrowing was manifest in aorta banding animals (red arrowheads). (b) Ascending aorta diameter in banding site remained unchanged, whereas animal growth was associated with a progressively increased diameter of the ascending aorta. (c) There were significant reductions in luminal diameter at average 28 and 58 days after aorta banding. Banding the ascending aorta caused a significant aortic luminal narrowing. versus sham operation. versus 28 or 58 days.

(a) Left ventricle end-systolic aortic MR images

(b)

(c)