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Gender Differences in Long-Term Outcomes Following PCI of Patients with Non-ST Elevation ACS: Results from the ACUITY Trial Alexandra J. Lansky on behalf of the ACUITY Investigators
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Disclosures Alexandra J. Lansky Insert disclosures here Alexandra J. Lansky Insert disclosures here
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Moderate and high risk ACS (n=13,819) Study Design – First Randomization Angiography within 72h Aspirin in all Clopidogrel dosing and timing per local practice Aspirin in all Clopidogrel dosing and timing per local practice UFH/Enox + GP IIb/IIIa (n=4,603) Bivalirudin + GP IIb/IIIa (n=4,604) Bivalirudin Alone (n=4,612) R* *Stratified by pre-angiography thienopyridine use or administration Moderate and high risk unstable angina or NSTEMI undergoing an invasive strategy (N = 13,819) Medical management PCI CABG
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Study Design – Second Randomization UFH/Enox + GP IIb/IIIa (N=4,603) Bivalirudin + GP IIb/IIIa (N=4,604) Bivalirudin Alone (N=4,612) R* Moderate and high risk unstable angina or NSTEMI undergoing an invasive strategy GPI upstream (N=2294) GPI CCL for PCI (N=2309) GPI upstream (N=2311) GPI CCL for PCI (N=2293) Aspirin in all Clopidogrel dosing and timing per local practice Aspirin in all Clopidogrel dosing and timing per local practice *Stratified by pre-angiography thienopyridine use or administration Moderate and high risk ACS (n=13,819)
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Management Strategy (N=13,819) 56.4% 11.4% 32.2% CABG (n=1,539) Medical Rx (n=4,491) PCI (n=7,789) Heparin + IIb/IIIa N = 2,561 Bivalirudin + IIb/IIIa N = 2,609 Bivalirudin alone N = 2,619
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UF HeparinEnoxaparinBivalirudin U/Kgmg/Kgmg/kg Bolus601.0 sc bid0.1 iv Infusion/h12 1 0.25 iv PCI ACT 200-250s 0.30 iv bolus 2 0.75 iv bolus 3 0.50 bolus iv 1.75/h infusion iv 4 CABGPer institution Per institution 5 Medical mgtNone 6 Study Medications Anti-thrombin agents (started pre angiography) 1 Target aPTT 50-75 seconds 2 If last enoxaparin dose ≥8h - <16h before PCI; 3 If maintenance dose discontinued or ≥16h from last dose 4 Discontinued at end of PCI with option to continue at 0.25mg/kg for 4-12h if GPIIb/IIIa inhibitor not used 5 Bivalirudin option for off-pump same as PCI dose. For on-pump bivalirudin discontinued 2 hours before 6 Option to continue with pre-PCI anti-thrombotic regimen at physician discretion
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3 Primary Endpoints (at 30 Days) Composite ischemia Death, MI, or unplanned revascularization for ischemia Major bleeding (non-CABG) Intracranial bleeding or intraocular bleeding Retroperitoneal bleeding Access site bleed requiring intervention/surgery Hematoma ≥5 cm Hgb ≥3g/dL with an overt source or ≥4g/dL w/o overt source Blood product transfusion Reoperation for bleeding Net clinical outcome composite ischemia or major bleeding Composite ischemia Death, MI, or unplanned revascularization for ischemia Major bleeding (non-CABG) Intracranial bleeding or intraocular bleeding Retroperitoneal bleeding Access site bleed requiring intervention/surgery Hematoma ≥5 cm Hgb ≥3g/dL with an overt source or ≥4g/dL w/o overt source Blood product transfusion Reoperation for bleeding Net clinical outcome composite ischemia or major bleeding
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Background Women with non-ST elevation acute coronary syndromes are at increased risk for ischemic and bleeding complications compared to men, especially among those undergoing PCI. In the ACUITY Trial, women undergoing PCI had similar ischemic event rates but significantly higher major bleeding complications compared to men at 30 days. Among women, treatment with bivalirudin resulted in significantly less major bleeding and similar ischemic outcomes at 30 days compared with heparin + GP IIb/IIIa inhibitors Women with non-ST elevation acute coronary syndromes are at increased risk for ischemic and bleeding complications compared to men, especially among those undergoing PCI. In the ACUITY Trial, women undergoing PCI had similar ischemic event rates but significantly higher major bleeding complications compared to men at 30 days. Among women, treatment with bivalirudin resulted in significantly less major bleeding and similar ischemic outcomes at 30 days compared with heparin + GP IIb/IIIa inhibitors
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Objectives To examine the impact of gender and antithrombotic therapy on early and late outcomes in patients with moderate and high risk ACS undergoing PCI in the ACUITY Trial We evaluated 30-day non-CABG Major Bleeding and 1-year Composite Ischemia and Mortality among: Male vs female patients undergoing PCI Female patients undergoing PCI and being treated with bivalirudin ± GP IIb/IIIa inhibition vs heparin plus GP IIb/IIIa inhibition To examine the impact of gender and antithrombotic therapy on early and late outcomes in patients with moderate and high risk ACS undergoing PCI in the ACUITY Trial We evaluated 30-day non-CABG Major Bleeding and 1-year Composite Ischemia and Mortality among: Male vs female patients undergoing PCI Female patients undergoing PCI and being treated with bivalirudin ± GP IIb/IIIa inhibition vs heparin plus GP IIb/IIIa inhibition
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Baseline Characteristics by Gender Males vs. Females Women (N=2091) Men (N=5698) P-value Age (median [range], yrs) 67 (25-95)61 (20-93) <0.0001 Weight (median [IQR], kg) 75 (65, 87)86 (78, 98)<0.0001 Diabetes34.5%25.1%<0.0001 Hypertension74.8%62.1%<0.0001 Hyperlipidemia59.1%55.0%0.002 Current smoker26.9%32.4%<0.0001 Prior MI26.2%32.0%<0.0001 Prior PCI37.7%39.0% 0.27 Prior CABG13.1%19.1%<0.0001 Renal insufficiency*31.0%13.9%<0.0001 Anemia † 19.5%14.4%<0.0001 *Calculated creatinine clearance <60 mL/min using the Cockcroft-Gault equation. † Anemia was defined using the World Health Organization criteria (Hemoglobin ≤13 g/dL for men and ≤12 g/dL for women).
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Clinical Outcomes by Gender Males vs. Females Women (N=2091) Men (N=5698) P-value 30-Day Major Bleeding 10.7%4.2%<0.0001 1-Year Composite Ischemia 19.6%18.5%0.27 1-Year Mortality3.5%3.1%0.31
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Baseline Characteristics – Female PCI pts Heparin + IIb/IIIa (N=701) Bivalirudin + IIb/IIIa (N=690) Bivalirudin alone (N=700) Age (median [range], yrs) 68 [25, 91]67 [37, 95]66 [34, 92] Weight (median [IQR], kg) 74 [64, 88]74 [65, 86]76 [65, 88] Diabetes36.1%33.2%34.1% Hypertension73.7%77.7%73.1% Hyperlipidemia57.6%62.9%56.8% Current smoker27.4%26.7%26.5% Prior MI23.9%28.9%25.8% Prior PCI36.3%38.0%38.6% Prior CABG13.3% 12.8% Renal insufficiency*5.5%5.6%5.5% Anemia † 17.8%18.3%18.9% *Calculated creatinine clearance <60 mL/min using the Cockcroft-Gault equation. † Anemia was defined using the World Health Organization criteria (Hemoglobin ≤13 g/dL for men and ≤12 g/dL for women).
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Baseline High Risk Features – Female PCI pts Heparin + IIb/IIIa (N=701) Bivalirudin + IIb/IIIa (N=690) Bivalirudin alone (N=700) Cardiac biomarker (MB or trop) 62.6%61.7%64.5% - Troponin 63.5%62.3%65.6% ST-segment ≥1mm 74.1%68.3%72.9% Cardiac biomarker or ST-segments 75.2%71.6%74.4% TIMI Risk Score 0-211.9%11.1%10.2% 3-450.6%52.9%54.7% 5-737.5%36.0%35.1%
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Antiplatelet Medications – Female PCI pts Heparin + IIb/IIIa (N=701) Bivalirudin + IIb/IIIa (N=690) Bivalirudin alone (N=700) Aspirin use or administration pre-angiography or PCI - Yes97.9%97.4%98.0% Thienopyridine use or administration pre PCI - Yes66.0%66.7%67.4% - Clopidogrel65.2%66.6%67.1% - Ticlopidine1.0%0.9%
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Procedural Characteristics – Female PCI pts Heparin + IIb/IIIa (N=701) Bivalirudin + IIb/IIIa (N=690) Bivalirudin alone (N=700) Attempted lesions per pt 1.47 ± 0.811.43 ± 0.771.42 ± 0.71 - 1 65.7%67.3%68.8% - 225.2%25.8%22.4% - ≥39.1%6.8%8.9% Attempted vessels per pt1.18 ± 0.451.16 ± 0.411.15 ± 0.38 - ≥215.4%14.9%14.3% Target Vessel - Left main1.2%0.8%1.4% - LAD39.8%40.1%39.8% - LCX27.6%26.3%27.0% - RCA31.4%32.9%31.8%
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Device Use – Female PCI pts Heparin + IIb/IIIa (N=701) Bivalirudin + IIb/IIIa (N=690) Bivalirudin alone (N=700) Stent implanted94.7%95.8%95.3% Drug-eluting stents62.8%62.2%61.2% - ≥1 Cypher implanted42.5%43.2%41.5% - ≥1 Taxus implanted48.2%48.1%50.2% - ≥1 other DES implanted6.8%8.9%6.6% Non-drug-eluting stent31.9%33.6%34.1% Thrombectomy1.7%0.7%1.4% Distal Protection1.1%1.5%1.1% Atherectomy0.7%0.9%0.3% Cutting Balloon3.0%4.4%3.0%
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1-Year Composite Ischemia – Female PCI pts *Heparin=unfractionated or enoxaparin Heparin* + IIb/IIIa vs. Bivalirudin + IIb/IIIa vs. Bivalirudin Alone 0306090120150180210240270300330360395 0 5 15 25 10 20 UFH/Enox + GP IIb/IIIa Bivalirudin + GP IIb/IIIa Bivalirudin alone p=0.18 Mortality (%) Days from Randomization
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0306090120150180210240270300330360395 0 1 3 5 2 4 UFH/Enox + GP IIb/IIIa Bivalirudin + GP IIb/IIIa Bivalirudin alone p=0.23 Mortality (%) Days from Randomization 1-Year Mortality – Female PCI pts *Heparin=unfractionated or enoxaparin Heparin* + IIb/IIIa vs. Bivalirudin + IIb/IIIa vs. Bivalirudin Alone
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30-Day Major Bleeding (non-CABG) – Female PCI pts Heparin + IIb/IIIa (N=701) Bivalirudin + IIb/IIIa (N=690) Bivalirudin alone (N=700) P value* Major bleeding11.8%13.9%6.3% <0.001 Intracranial0%0% (1)0% 1.00 Retroperitoneal1.9% 0.3% 0.004 Access site5.7%5.9%1.9% <0.001 - req interv/surgery1.3%1.7%0.9% 0.44 - hematoma ≥5 cm5.0%4.8%1.6% <0.001 Hgb ≥3 g/dL with overt source 5.6%5.4%1.7% <0.0001 Hgb ≥4 g/dL with no overt source 1.4%2.5%1.7% 0.66 Blood transfusion6.1%8.1%3.7% 0.04 Reoperation for bleed0%0.1% 0.32 *P value for bivalirudin alone vs. heparin + IIb/IIIa inhibitor
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Bleeding Endpoints – Female PCI pts Heparin + IIb/IIIa (N=701) Bivalirudin + IIb/IIIa (N=690) Bivalirudin alone (N=700) P Value ACUITY Scale - Major Bleed, all12.1%14.1%6.9% <0.001 - Major, non-CABG11.8%13.9%6.3% <0.001 - Minor, non-CABG32.5%34.2%17.1% <0.001 TIMI Scale - Any12.0%12.8%6.7% <0.001 - Major4.0%4.2%1.3% <0.001 - Minor11.8%12.3%6.3% <0.001 Transfusions, non-CABG 6.1%8.1%3.7% 0.04 *P value for bivalirudin alone vs. heparin + IIb/IIIa inhibitor
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Study Limitations Even though the baseline characteristics of the 3 groups were well matched, the ACUITY PCI Gender sub-study is not a randomized trial The ACUITY PCI Gender sub-study was under- powered for non-inferiority testing and subgroups All analyses should be considered hypothesis generating Given the complexity of the trial, the study design was open label, and as such bias cannot be excluded Even though the baseline characteristics of the 3 groups were well matched, the ACUITY PCI Gender sub-study is not a randomized trial The ACUITY PCI Gender sub-study was under- powered for non-inferiority testing and subgroups All analyses should be considered hypothesis generating Given the complexity of the trial, the study design was open label, and as such bias cannot be excluded
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Conclusions and Clinical Implications In patients with moderate and high risk ACS undergoing PCI Women undergoing PCI have similar long- term ischemia outcomes as men but with significantly increased major bleeding at 30 days. Among women, treatment with bivalirudin alone resulted in significantly reduced 30 day major bleeding and similar rates of 1-year composite ischemia and mortality compared to heparin + GP IIb/IIIa inhibitors. In patients with moderate and high risk ACS undergoing PCI Women undergoing PCI have similar long- term ischemia outcomes as men but with significantly increased major bleeding at 30 days. Among women, treatment with bivalirudin alone resulted in significantly reduced 30 day major bleeding and similar rates of 1-year composite ischemia and mortality compared to heparin + GP IIb/IIIa inhibitors.
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