18 February 2008
Medical insurance restricting access to clopidogrel can delay or stop patients receiving treatment with the drug after percutaneous coronary intervention with stenting, which in turn may increase their risk for dying, a Canadian study suggests.
Medwire News: Restricted clopidogrel access linked to increased mortality after PCI
Showing posts with label Clopidogrel. Show all posts
Showing posts with label Clopidogrel. Show all posts
Monday, February 18, 2008
Wednesday, February 6, 2008
Incidence of Death and Acute Myocardial Infarction Associated With Stopping Clopidogrel After Acute Coronary Syndrome
Incidence of Death and Acute Myocardial Infarction Associated With Stopping Clopidogrel After Acute Coronary Syndrome
P. Michael Ho, MD, PhD; Eric D. Peterson, MD, MPH; Li Wang, MS; David J. Magid, MD, MPH; Stephan D. Fihn, MD, MPH; Greg C. Larsen, MD; Robert A. Jesse, MD, PhD; John S. Rumsfeld, MD, PhD
JAMA. 2008;299(5):532-539.
Context
It is unknown whether patients are at increased short-term risk for adverse events following clopidogrel cessation.
Objective
To assess the rates of adverse events after stopping treatment with clopidogrel in a national sample of patients with acute coronary syndrome (ACS).
Design, Setting, and Patients
Retrospective cohort study of 3137 patients with ACS discharged from 127 Veterans Affairs hospitals between October 1, 2003, and March 31, 2005, with posthospital treatment with clopidogrel.
Main Outcome Measure
Rate of all-cause mortality or acute myocardial infarction (AMI) after stopping treatment with clopidogrel.
Results
Mean (SD) follow-up after stopping treatment with clopidogrel was 196 (152) days for medically treated patients with ACS without stents (n = 1568) and 203 (148) days for patients with ACS treated with percutaneous coronary intervention (PCI) (n = 1569). Among medically treated patients, mean (SD) duration of clopidogrel treatment was 302 (151) days and death or AMI occurred in 17.1% (n = 268) of patients, with 60.8% (n = 163) of events occurring during 0 to 90 days, 21.3% (n = 57) during 91 to 180 days, and 9.7% (n = 26) during 181 to 270 days after stopping treatment with clopidogrel. In multivariable analysis including adjustment for duration of clopidogrel treatment, the first 90-day interval after stopping treatment with clopidogrel was associated with a significantly higher risk of adverse events (incidence rate ratio [IRR], 1.98; 95% confidence interval [CI], 1.46-2.69 vs the interval of 91-180 days). Similarly, among PCI-treated patients with ACS, mean (SD) duration of clopidogrel treatment was 278 (169) days and death or AMI occurred in 7.9% (n = 124) of patients, with 58.9% (n = 73) of events occurring during 0 to 90 days, 23.4% (n = 29) during 91 to 180 days, and 6.5% (n = 8) during 181 to 270 days after stopping clopidogrel treatment. In multivariable analysis including adjustment for duration of clopidogrel treatment, the first 90-day interval after stopping clopidogrel treatment was associated with a significantly higher risk of adverse events (IRR, 1.82; 95% CI, 1.17-2.83).
Conclusions
'
P. Michael Ho, MD, PhD; Eric D. Peterson, MD, MPH; Li Wang, MS; David J. Magid, MD, MPH; Stephan D. Fihn, MD, MPH; Greg C. Larsen, MD; Robert A. Jesse, MD, PhD; John S. Rumsfeld, MD, PhD
JAMA. 2008;299(5):532-539.
Context
It is unknown whether patients are at increased short-term risk for adverse events following clopidogrel cessation.
Objective
To assess the rates of adverse events after stopping treatment with clopidogrel in a national sample of patients with acute coronary syndrome (ACS).
Design, Setting, and Patients
Retrospective cohort study of 3137 patients with ACS discharged from 127 Veterans Affairs hospitals between October 1, 2003, and March 31, 2005, with posthospital treatment with clopidogrel.
Main Outcome Measure
Rate of all-cause mortality or acute myocardial infarction (AMI) after stopping treatment with clopidogrel.
Results
Mean (SD) follow-up after stopping treatment with clopidogrel was 196 (152) days for medically treated patients with ACS without stents (n = 1568) and 203 (148) days for patients with ACS treated with percutaneous coronary intervention (PCI) (n = 1569). Among medically treated patients, mean (SD) duration of clopidogrel treatment was 302 (151) days and death or AMI occurred in 17.1% (n = 268) of patients, with 60.8% (n = 163) of events occurring during 0 to 90 days, 21.3% (n = 57) during 91 to 180 days, and 9.7% (n = 26) during 181 to 270 days after stopping treatment with clopidogrel. In multivariable analysis including adjustment for duration of clopidogrel treatment, the first 90-day interval after stopping treatment with clopidogrel was associated with a significantly higher risk of adverse events (incidence rate ratio [IRR], 1.98; 95% confidence interval [CI], 1.46-2.69 vs the interval of 91-180 days). Similarly, among PCI-treated patients with ACS, mean (SD) duration of clopidogrel treatment was 278 (169) days and death or AMI occurred in 7.9% (n = 124) of patients, with 58.9% (n = 73) of events occurring during 0 to 90 days, 23.4% (n = 29) during 91 to 180 days, and 6.5% (n = 8) during 181 to 270 days after stopping clopidogrel treatment. In multivariable analysis including adjustment for duration of clopidogrel treatment, the first 90-day interval after stopping clopidogrel treatment was associated with a significantly higher risk of adverse events (IRR, 1.82; 95% CI, 1.17-2.83).
Conclusions
'
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