CLINICAL RESEARCH: MYOCARDIAL ISCHEMIA AND INFARCTION
Hemoglobin level is an independent predictor for adverse cardiovascular outcomes in women undergoing evaluation for chest pain
Results from the National Heart, Lung, and Blood Institute women's ischemia syndrome evaluation study
Christopher B. Arant, MD*,2,
Timothy R. Wessel, MD*,
Marian B. Olson, MS ,
C. Noel Bairey Merz, MD, FACC¶,
George Sopko, MD#,
William J. Rogers, MD, FACC||,
Barry L. Sharaf, MD, FACC ,
Steven E. Reis, MD, FACC ,
Karen M. Smith, MD, FACC*,
B. Delia Johnson, PhD ,
Eileen Handberg, PhD*,
Sunil Mankad, MD, FACC and
Carl J. Pepine, MD, MACC*,1
* University of Florida College of Medicine, Division of Cardiovascular Medicine, Gainesville, Florida, USA
Allegheny General Hospital, Pittsburgh, Pennsylvania, USA
Cardiovascular Institute, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, USA
Division of Medicine, Department of Cardiology, Rhode Island Hospital, Providence, Rhode Island, USA
|| Division of Cardiology, University of Alabama Birmingham, Birmingham, Alabama, USA
¶ Division of Cardiology, Department of Medicine, Cedars-Sinai Research Institute, Cedars-Sinai Medical Center, Los Angeles, California, USA
# Division of Heart and Vascular Disease, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, Maryland, USA
Manuscript received September 30, 2003;
revised manuscript received December 23, 2003,
accepted January 19, 2004.
2 Correspondence: Dr. Christopher B. Arant, University of Florida Medicine, 1600 SW Archer Road, P.O. Box 100277, Gainesville, Florida 32610-0277, USA. chrsarant{at}aol.com 1 Reprint requests: Dr. Carl J. Pepine, University of Florida College of Medicine, Division of Cardiovascular Medicine, P.O. Box 100277, Gainesville, Florida 32610-0277. pepincj{at}medicine.ufl.edu
OBJECTIVES: This study was designed to investigate the relationship between hemoglobin level (Hgb) and adverse cardiovascular outcomes in women with suspected ischemia.
BACKGROUND: Low Hgb levels correlate with increased cardiovascular morbidity and mortality in patients presenting with acute myocardial infarction (MI) or congestive heart failure (CHF). However, the prognostic significance of Hgb in women with suspected ischemia is unclear.
METHODS: As part of the National Heart, Lung, and Blood Institute (NHLBI)-sponsored Women's Ischemia Syndrome Evaluation (WISE), we prospectively studied 936 women referred for coronary angiography to evaluate suspected ischemia. We compared Hgb levels with cardiovascular risk factors, core lab interpreted angiograms, inflammatory markers, and adverse cardiovascular outcomes.
RESULTS: Of women enrolled, 864 (mean age 58.4 ±11.6 years) had complete Hgb, angiogram, and follow-up (mean 3.3 ± 1.7 years) data. The mean Hgb was 12.9 g/dl (range 7.7 to 16.4 g/dl) and 184 women (21%) were anemic (Hgb <12 g/dl). Anemic women had higher creatinine and were more likely to be nonwhite and have a history of diabetes, hypertension, and CHF (p < 0.05). However, we found no difference in EF or severity of coronary artery disease. Anemic women had a higher risk of death from any cause (10.3% vs. 5.4%; p = 0.02) and total adverse outcomes (26% vs. 16%, p < 0.01). In a multivariable model, decreasing Hgb was associated with significantly higher risk of adverse outcomes (hazard ratio = 1.20, p = 0.002). Also, anemic women had shorter survival time free of adverse outcome (p < 0.001).
CONCLUSIONS: Our findings extend previous reports, linking lower hemoglobin levels with higher risk for adverse cardiovascular outcomes, to women evaluated for suspected ischemia in the absence of acute MI or CHF.
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Abbreviations and Acronyms
| | CAD | = coronary artery disease | | CHF | = congestive heart failure | | EF | = ejection fraction | | HF | = heart failure | | Hgb | = hemoglobin | | hs-CRP | = high sensitivity C-reactive protein | | IL | = interleukin | | MI | = myocardial infarction | | TNF | = tumor necrosis factor | | WISE | = Women's Ischemia Syndrome Evaluation study |
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