title: Relation of elevated plasma renin activity at baseline to cardiac events in patients with angiographically proven coronary artery disease.
abstract: Plasma renin activity (PRA) is a measure of renin-angiotensin system activity and is associated with cardiovascular outcomes in patients with heart failure (HF). We conducted a prospective analysis to assess whether elevated baseline PRA is associated with cardiovascular outcomes in 1,165 patients with coronary artery disease (> or =70% stenosis on the coronary angiogram) enrolled in the Intermountain Heart Collaborative Study. The exclusion criteria included previous myocardial infarction (MI) or HF, ejection fraction < or =45%, and a discharge diagnosis of MI/beta-blocker treatment. Baseline PRA measurements were evaluated as risk categories (< or =0.50, 0.51 to 2.30, and >2.30 ng/ml/h) and as tertiles (< or =0.40, 0.41 to 1.90, and > or =1.90 ng/ml/h). Predefined cardiovascular outcomes were assessed for a minimum follow-up of 3 years (mean 6.4 +/- 3.2, maximum 14.6) using Cox regression analysis to adjust for the baseline characteristics. The mean patient age was 64.4 years; most patients were men (73.1%) and hypertensive (63.2%). Elevated baseline PRA (high vs low category; >2.30 vs < or =0.50 ng/ml/h) was associated with a significantly increased risk of 3-year cardiac morbidity/mortality (hazard ratio 1.96; p = 0.004), MI (hazard ratio 2.41; p = 0.02), HF hospitalization (hazard ratio 4.39; p = 0.03), and all-cause death (hazard ratio 1.80; p = 0.01). Elevated baseline PRA was also associated with longer-term HF hospitalization (hazard ratio 2.12; p = 0.004) and all-cause death (hazard ratio 1.56; p = 0.002). Similar results were observed for the PRA tertiles. The association of PRA with outcomes was observed after correction for hypertension, hyperlipidemia, diabetes, a family history of cardiovascular events, smoking, renal failure, and the use of statins. In conclusion, elevated baseline PRA is associated with cardiac morbidity and mortality in patients with coronary artery disease but normal left ventricular function and no previous MI or HF.
authors.affiliation: Intermountain Medical Center, Murray, Utah; University of Utah, Salt Lake City, Utah, USA. Brent.Muhlestein@imail.org
authors.forename: Joseph B
authors.initials: JB
authors.lastname: Muhlestein
authors.forename: Heidi T
authors.initials: HT
authors.lastname: May
authors.forename: Tami L
authors.initials: TL
authors.lastname: Bair
authors.forename: Margaret F
authors.initials: MF
authors.lastname: Prescott
authors.forename: Benjamin D
authors.initials: BD
authors.lastname: Horne
authors.forename: Richard
authors.initials: R
authors.lastname: White
authors.forename: Jeffrey L
authors.initials: JL
authors.lastname: Anderson
mesh_terms: D000368:Aged; D015415:Biomarkers / Q000097:blood; D017023:Coronary Angiography; D003324:Coronary Artery Disease / Q000097:blood* / Q000000981:diagnostic imaging* / Q000401:mortality; D005260:Female; D005500:Follow-Up Studies; D006333:Heart Failure / Q000097:blood / Q000175:diagnosis / Q000209:etiology; D006801:Humans; D006973:Hypertension / Q000097:blood / Q000150:complications / Q000175:diagnosis; D007902:Length of Stay; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000097:blood / Q000175:diagnosis / Q000209:etiology; D016017:Odds Ratio; D011237:Predictive Value of Tests; D016016:Proportional Hazards Models; D011446:Prospective Studies; D012044:Regression Analysis; D012083:Renin / Q000097:blood*; D012084:Renin-Angiotensin System; D012307:Risk Factors; D012720:Severity of Illness Index; D016019:Survival Analysis
chemical_list: D015415:Biomarkers; D012083:Renin