Effect of angiotensin-converting enzyme inhibitor therapy on 30-day outcome in patients ≥65 years of age with chronic congestive heart failure∗∗The analyses upon which this publication is based were performed under contract number 500-96-P613, entitled “Operation of Utilization and Quality Control Peer Review Organization (PRO) for the state of North Carolina, sponsored by the Health Care Financing Administration, Department of Health and Human Services.” The conclusions and opinions expressed, and methods used herein are those of the investigators. They do not necessarily reflect Health Care Financing Administration policy. The investigators assume full responsibility for the accuracy and completeness of the ideas presented.