Animals 2 Aorta 2 Aortic pressure 2 Aortic wall energetics 2 Biomechanics 2 Cardiac Output 2 Cardiology 2 Coronary Circulation 2 Coronary Vessels 2 Counterpulsation 2 Disease Models, Animal 2 Energy dissipation 2 Heart Failure 2 Heart Rate 2 Intra-Aortic Balloon Pumping 2 Intra-aortic balloon pumping (IABP) 2 Intra-aortic counterpulsation Models, Biological 2 Physiological models 2 Pressure 2 Pressure effects 2 Sheep 2 Time Factors 2 animal cell 2 animal experiment 2 animal model 2 animal tissue 2 aorta balloon 2 aorta pressure 2 aorta wall 2