The opacification of the left ventricle by echo cardiographic contrast agents (echoventriculography) represents an alternative to cineventriculography, as determinations of left ventricular volume and ejection fraction are accurate and highly reproducible, when methods like color superposition and statist ical imaging techniques are used in order to improve the outlining of the cavity and endocardial border. Detection of perfusion defects is possible 40]. The enhancement of myocardial contrast during the perfusion phase after injection into the left ventricle or the aorta further improves...