title: Predictors of benefit in angina patients one year after completing enhanced external counterpulsation: initial responders to treatment versus nonresponders.
abstract: Enhanced external counterpulsation (EECP) has been shown to reduce Canadian Cardiovascular Society angina class. This study examines the factors that affect the reduction at 1 year, especially in patients who do not demonstrate an initial response. The data of 2,007 consecutive patients enrolled in the International EECP Patient Registry were analyzed. After 36.6 +/- 4.9 h of EECP, angina was reduced by at least one class in 82.7%. At 1 year, 35.4% of initial nonresponders and 70.6% of responders remained improved by at least one angina class and free of major adverse cardiovascular events. Multivariate predictors of 1-year benefit are initial response to treatment (odds ratio 4.5, 95% CI 3.5-5.8), baseline angina class compared with class IV (odds ratios: class I 2.1, CI 0.93-4.81; class II 0.62, CI 0.43-0.87; class III 0.80, CI 0.62-1.01) and no history of congestive heart failure (odds ratio 1.41, CI 1.14-1.74).
authors.affiliation: State University of New York at Stony Brook, NY 11740, USA. william.lawson@stonybrook.edu
authors.forename: William E
authors.initials: WE
authors.lastname: Lawson
authors.forename: John C K
authors.initials: JC
authors.lastname: Hui
authors.forename: Elizabeth D
authors.initials: ED
authors.lastname: Kennard
authors.forename: Gregory
authors.initials: G
authors.lastname: Barsness
authors.forename: Sheryl F
authors.initials: SF
authors.lastname: Kelsey
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000787:Angina Pectoris / Q000145:classification / Q000601:surgery*; D015906:Angioplasty, Balloon, Coronary; D002908:Chronic Disease; D015331:Cohort Studies; D001026:Coronary Artery Bypass; D015908:Counterpulsation / Q000379:methods*; D005260:Female; D005500:Follow-Up Studies; D005544:Forecasting; D006801:Humans; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000209:etiology; D005996:Nitroglycerin / Q000627:therapeutic use; D011446:Prospective Studies; D011788:Quality of Life; D015996:Survival Rate; D016896:Treatment Outcome; D014665:Vasodilator Agents / Q000627:therapeutic use
chemical_list: D014665:Vasodilator Agents; D005996:Nitroglycerin