OBJECTIVE: To assess bleeding and activated partial thromboplastin time (APTT) in relation to body mass index (BMI) in patients prescribed weight-based dosing of intravenous unfractionated heparin (UFH) for cardiac indications without a maximum (dose-capped) initial bolus or capped initial infusion rate. PATIENTS AND METHODS: Consecutive patients admitted to an academic medical center from February 1, 2002, through November 31, 2003, who were treated with a UFH nomogram consisting of a 60-U/kg intravenous bolus plus an initial continuous intravenous infusion of 12 U/kg hourly and titrated to a goal APTT range corresponding to thromboplastin-adjusted target heparin levels of 0.3 to 0.7 U/mL by anti-Xa assay were evaluated for this retrospective cohort study. Patients were excluded if they concomitantly received a fibrinolytic, glycoprotein IIb/IIIa inhibitor, or any other antithrombotic agent (except warfarin). Study patients were divided into quartiles by BMI. RESULTS: Of the 1054 patients included in the study, 807 (76.6%) had an initial bolus dose higher than 4000 U, and 477 (45.3%) had an initial infusion rate higher than 1000 U/h. Despite a significant difference among BMI quartiles in proportion of supratherapeutic first APTT values (P<.001), no statistically significant difference was found in bleeding frequency (P=.26) or frequency of first APTT within the goal range (P=.27). Logistic regression analyses revealed that BMI was not a significant predictor of bleeding or first APTT within the goal range. CONCLUSION: We did not find any difference in the proportion of first APTT values in the goal range or an increased risk of bleeding in obese patients treated with UFH without a capped initial dose. Our data demonstrate the safe use of weight-based UFH without a capped initial bolus dose or capped initial infusion rate in patients with medical cardiac conditions.
OBJECTIVE: To assess bleeding and activated partial thromboplastin time (APTT) in relation to body mass index (BMI) in patients prescribed weight-based dosing of intravenous unfractionated heparin (UFH) for cardiac indications without a maximum (dose-capped) initial bolus or capped initial infusion rate. PATIENTS AND METHODS: Consecutive patients admitted to an academic medical center from February 1, 2002, through November 31, 2003, who were treated with a UFH nomogram consisting of a 60-U/kg intravenous bolus plus an initial continuous intravenous infusion of 12 U/kg hourly and titrated to a goal APTT range corresponding to thromboplastin-adjusted target heparin levels of 0.3 to 0.7 U/mL by anti-Xa assay were evaluated for this retrospective cohort study. Patients were excluded if they concomitantly received a fibrinolytic, glycoprotein IIb/IIIa inhibitor, or any other antithrombotic agent (except warfarin). Study patients were divided into quartiles by BMI. RESULTS: Of the 1054 patients included in the study, 807 (76.6%) had an initial bolus dose higher than 4000 U, and 477 (45.3%) had an initial infusion rate higher than 1000 U/h. Despite a significant difference among BMI quartiles in proportion of supratherapeutic first APTT values (P<.001), no statistically significant difference was found in bleeding frequency (P=.26) or frequency of first APTT within the goal range (P=.27). Logistic regression analyses revealed that BMI was not a significant predictor of bleeding or first APTT within the goal range. CONCLUSION: We did not find any difference in the proportion of first APTT values in the goal range or an increased risk of bleeding in obesepatients treated with UFH without a capped initial dose. Our data demonstrate the safe use of weight-based UFH without a capped initial bolus dose or capped initial infusion rate in patients with medical cardiac conditions.
Authors: Jeffrey L Anderson; Cynthia D Adams; Elliott M Antman; Charles R Bridges; Robert M Califf; Donald E Casey; William E Chavey; Francis M Fesmire; Judith S Hochman; Thomas N Levin; A Michael Lincoff; Eric D Peterson; Pierre Theroux; Nanette Kass Wenger; R Scott Wright; Sidney C Smith; Alice K Jacobs; Jonathan L Halperin; Sharon A Hunt; Harlan M Krumholz; Frederick G Kushner; Bruce W Lytle; Rick Nishimura; Joseph P Ornato; Richard L Page; Barbara Riegel Journal: Circulation Date: 2007-08-06 Impact factor: 29.690
Authors: John W Wilson; Lance J Oyen; Narith N Ou; M Molly McMahon; Rodney L Thompson; Janice M Manahan; Kevin K Graner; Jenna K Lovely; Lynn L Estes Journal: Am J Health Syst Pharm Date: 2005-03-01 Impact factor: 2.637
Authors: C B Granger; J Hirsch; R M Califf; J Col; H D White; A Betriu; L H Woodlief; K L Lee; E G Bovill; R J Simes; E J Topol Journal: Circulation Date: 1996-03-01 Impact factor: 29.690
Authors: Anthony T Gerlach; Jerilynn Folino; Benjamin N Morris; Claire V Murphy; Stansilaw P Stawicki; Charles H Cook Journal: Int J Crit Illn Inj Sci Date: 2013-07
Authors: James W Schurr; Anne-Marie Muske; Craig A Stevens; Sarah E Culbreth; Katelyn W Sylvester; Jean M Connors Journal: Clin Appl Thromb Hemost Date: 2019 Jan-Dec Impact factor: 2.389