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Nearly 8 million people in the United States suffer from symptoms of coronary artery disease (CAD).Unfortunately,the population of patients with ischemic coronary disease that is not readily amenable to surgical or percutaneous revascularization continues to grow.For patients who are not candidates for standard revascularization procedures and in whom aggressive medical therapy fails to control symptoms,enhanced external counterpulsation (EECP) is a new,noninvasive outpatient method to improve quality of life by decreasing ischemic symptoms and permit increased activity.