 The objective of this clinical study will be to visualize both coronary and carotid arteries as well as detect myocardial perfusion following a routine intravenous injection of Definity 0.05-0.20 millimeters, Optison 0.1-0.4 millimeters or PESDA 0.05-0.2 mL. Following these injections , we will attempt to Contrast Pulse Sequencing on the Siemens Acuson Sequoia system to image both the coronary and carotid arteries, as well as the Myocardial perfusion. 