OBJECTIVES: A simple risk score on admission to estimate the likelihood of in-hospital coronary artery bypass graft surgery (CABG) might be useful in selecting patients for early clopidogrel therapy. BACKGROUND: Routine early use of clopidogrel in patients with unstable angina (UA) and non-ST-segment elevation myocardial infarction (NSTEMI) is associated with increased risk of bleeding in patients who undergo early CABG. METHODS: The test cohort utilized to derive the score was the 2,220 patients with UA/NSTEMI enrolled in the Treat Angina with Aggrastat and Determine Cost of Therapy with an Invasive or Conservative Strategy-Thrombolysis in Myocardial Infarction-18 (TACTICS-TIMI-18) trial. Patients who underwent CABG after randomization during index hospitalization were identified and were compared with patients who did not undergo in-hospital CABG. RESULTS: Overall, 362 patients (16.3%) underwent CABG during the index hospitalization. Patients with a history of prior CABG (n = 484) were significantly less likely to undergo in-hospital CABG (odds ratio [OR], 0.34). Five additional variables independently associated with CABG were identified: elevated troponin (OR, 3.9), prior stable angina (OR, 1.8), ST-segment deviation >or=0.5 mm (OR, 1.7), male gender (OR, 1.6), and history of peripheral arterial disease (OR, 1.6). A CABG risk score was generated by assigning numerical values to each of the variables based upon these odds ratios. Coronary artery bypass surgery rates increased significantly with increasing risk scores (6.2% for a risk score <3.0, 21.9% for 3 to 5, and 54.6% for >5.0). The association of the risk score with CABG was highly significant (p < 0.0001, c-statistic 0.72). The association remained significant in the validation cohorts from TIMI-11B trial and TIMI-III registry. CONCLUSIONS: Among patients with UA/NSTEMI, a novel risk score based on admission clinical variables can be used to estimate the likelihood of CABG. These data may assist in the identification of patients who might derive optimal benefit from early initiation of clopidogrel therapy.
RCT Entities:
OBJECTIVES: A simple risk score on admission to estimate the likelihood of in-hospital coronary artery bypass graft surgery (CABG) might be useful in selecting patients for early clopidogrel therapy. BACKGROUND: Routine early use of clopidogrel in patients with unstable angina (UA) and non-ST-segment elevation myocardial infarction (NSTEMI) is associated with increased risk of bleeding in patients who undergo early CABG. METHODS: The test cohort utilized to derive the score was the 2,220 patients with UA/NSTEMI enrolled in the Treat Angina with Aggrastat and Determine Cost of Therapy with an Invasive or Conservative Strategy-Thrombolysis in Myocardial Infarction-18 (TACTICS-TIMI-18) trial. Patients who underwent CABG after randomization during index hospitalization were identified and were compared with patients who did not undergo in-hospital CABG. RESULTS: Overall, 362 patients (16.3%) underwent CABG during the index hospitalization. Patients with a history of prior CABG (n = 484) were significantly less likely to undergo in-hospital CABG (odds ratio [OR], 0.34). Five additional variables independently associated with CABG were identified: elevated troponin (OR, 3.9), prior stable angina (OR, 1.8), ST-segment deviation >or=0.5 mm (OR, 1.7), male gender (OR, 1.6), and history of peripheral arterial disease (OR, 1.6). A CABG risk score was generated by assigning numerical values to each of the variables based upon these odds ratios. Coronary artery bypass surgery rates increased significantly with increasing risk scores (6.2% for a risk score <3.0, 21.9% for 3 to 5, and 54.6% for >5.0). The association of the risk score with CABG was highly significant (p < 0.0001, c-statistic 0.72). The association remained significant in the validation cohorts from TIMI-11B trial and TIMI-III registry. CONCLUSIONS: Among patients with UA/NSTEMI, a novel risk score based on admission clinical variables can be used to estimate the likelihood of CABG. These data may assist in the identification of patients who might derive optimal benefit from early initiation of clopidogrel therapy.
Authors: David H Fitchett; Bjug Borgundvaag; Warren Cantor; Eric Cohen; Sanjay Dhingra; Stephen Fremes; Milan Gupta; Michael Heffernan; Heather Kertland; Mansoor Husain; Anatoly Langer; Eric Letovsky; Shaun G Goodman Journal: Can J Cardiol Date: 2006-06 Impact factor: 5.223
Authors: David Fitchett; John Eikelboom; Stephen Fremes; David Mazer; Steve Singh; Bindu Bittira; Stephanie Brister; John J Graham; Milan Gupta; Keyvan Karkouti; Agnes Lee; Michael Love; Rod McArthur; Mark Peterson; Subodh Verma; Terrence M Yau Journal: Can J Cardiol Date: 2009-12 Impact factor: 5.223
Authors: Deborah B Diercks; Michael C Kontos; Judd E Hollander; Bryn E Mumma; DaJuanicia N Holmes; Stephen Wiviott; Jorge F Saucedo; James A de Lemos Journal: Am J Emerg Med Date: 2013-05-20 Impact factor: 2.469
Authors: Ali Shafiq; Jae-Sik Jang; Faraz Kureshi; Timothy J Fendler; Kensey Gosch; Phil G Jones; David J Cohen; Richard Bach; John A Spertus Journal: Ann Thorac Surg Date: 2016-06-03 Impact factor: 4.330
Authors: Ali Shafiq; Javier Valle; Jae-Sik Jang; Mohammed Qintar; Kensey Gosch; David J Cohen; Mandeep Singh; Richard Bach; John A Spertus Journal: J Am Heart Assoc Date: 2016-06-10 Impact factor: 5.501