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Articles by L. K Shaw
Total Records ( 2 ) for L. K Shaw
  M. Y Chan , J. L Sun , L. K Newby , L. K Shaw , M Lin , E. D Peterson , R. M Califf , D. F Kong and M. T. Roe

Background— There are limited contemporary data comparing long-term outcomes after cardiac catheterization for ST-segment elevation myocardial infarction (STEMI) and non-STEMI (NSTEMI).

Methods and Results— We studied patients undergoing cardiac catheterization for STEMI (n=2413) and NSTEMI (n=1974) between 1999 and 2005 with at least 1 significant coronary lesion ≥75%. We compared adjusted mortality rates over restricted time intervals and the differential impact of early revascularization on mortality stratified by ST-elevation status. Between 1999 and 2007, 1274 patients died, with a median follow-up of 4 years. A piece-wise analysis showed a higher adjusted mortality risk for STEMI during the first 2 months (adjusted hazard ratio, 1.85; 95% confidence interval, 1.45 to 2.38) and a lower adjusted mortality risk for STEMI after 2 months (adjusted hazard ratio, 0.68; 95% confidence interval, 0.59 to 0.83). Compared with late or no revascularization, early revascularization was associated with a lower adjusted risk of mortality for both STEMI (adjusted hazard ratio, 0.73; 95% confidence interval, 0.58 to 0.90) and NSTEMI (adjusted hazard ratio, 0.76; 95% confidence interval, 0.65 to 0.89) (P for interaction=0.22).

Conclusions— Among a contemporary cohort of acute MI patients with significant coronary disease during cardiac catheterization, STEMI was associated with a higher risk of short-term mortality, but NSTEMI was associated with a higher risk of long-term mortality. Early revascularization was associated with a similar improvement in long-term outcomes for both STEMI and NSTEMI. These data suggest that in clinical investigations of early revascularization among patients with NSTEMI, extended follow-up may be necessary to demonstrate treatment benefit.

  J. L Petersen , E Yow , W AlJaroudi , L. K Shaw , A Goyal , D. K McGuire , E. D Peterson and R. A. Harrington

Background— Metabolic syndrome (MetSyn) is associated with increased cardiovascular risk in the general population. Its prognostic implications are less well defined in patients with coronary artery disease.

Methods and Results— We analyzed patients in the Duke Database for Cardiovascular Disease with a diagnosis of incident obstructive coronary artery disease. Diabetes mellitus (DM) was classified as a clinical history of DM, use of hypoglycemic drugs, or fasting glucose of ≥126 mg/dL. MetSyn was defined as having 3 of 5 characteristics: fasting glucose ≥100 and <126 mg/dL, low high-density lipoprotein cholesterol (men, <40 mg/dL; women, <50 mg/dL), triglycerides >150 mg/dL, blood pressure ≥130/85 mm Hg, or use of antihypertensive therapy, or body mass index ≥27. Death, myocardial infarction, or stroke was assessed at 6 months, 1 year, then annually. Cox proportional hazards models were generated to compare mortality and cardiovascular events between groups. The primary cohort consisted of 5744 patients; 1831 (31.9%) had DM, 2491 (43.4%) had MetSyn, and 1422 (24.7%) had no DM/MetSyn. Median follow-up was 5 years. Compared with no DM/MetSyn patients, DM patients had a higher adjusted risk for mortality (hazard ratio, 1.47; 95% CI, 1.28 to 1.69) but MetSyn patients did not (hazard ratio, 0.94; 95% CI, 0.81 to 1.08). Similar results were found for the combined end points of death or myocardial infarction, and death, myocardial infarction, or stroke.

Conclusions— In a population of consecutive patients with a new diagnosis of coronary artery disease by angiography, MetSyn without DM was not an independent predictor of mortality or cardiovascular events.

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