 The objective of this study is to determine whether myocardial contrast echocardiography in patients with cardiomyopathy HCM can detect resting hypo-perfusion due to fibrosis or stress induced perfusion defects due to associated abnormalities in intramyocardial arteries and the microcirculation. A secondary aim will be to determine whether abnormalities in perfusion are associated with either severity of symptoms chest pain and dyspnea, presence of arrhythmias, and regional function of the septum. 