re, myocardial infarction, radiation-induced cardiac dysfunctionKnown allergy to either ACE inhibitors or ??-blockersHistory of bronchial asthma or related bronchospastic conditionsHereditary or idiopathic angioedemaHistory of severe hypersensitivity reactions to drugs or other causes, i.e. bee stingsThis protocol does not exclude patients who are participating on other investigational studies.