AI Article Synopsis
- The standard care recommends waiting 5 to 7 days after stopping antiplatelet agents before noncardiac procedures due to stent thrombosis concerns, but this can be challenging.
- A study with 62 patients assessed platelet reactivity after stopping antiplatelet drugs, finding that reactivity increased progressively over the days following cessation.
- Results suggested that full recovery of platelet function could occur in less than 5 days, indicating that point-of-care testing like VerifyNow can effectively guide the timing of noncardiac procedures after stopping antiplatelet therapy.
Article Abstract
Background: The current standard of care is to delay noncardiac procedure (NCP) 5 to 7 days after discontinuation of antiplatelet agents (APAs) in patients with coronary stents. However, it is often difficult to follow because of concerns over stent thrombosis. The point-of-care aspirin/P2Y(12) assay (VerifyNow; Accumetrics Inc, San Diego, CA) is useful to evaluate platelet reactivity in conjunction with APAs. In this study, we evaluated the feasible timing after discontinuation of APAs.
Methods And Results: Sixty-two patients taking APAs, who were scheduled to undergo elective NCP, were enrolled. All patients took either aspirin 100 mg or aspirin 100 mg plus clopidogrel 75 mg daily. The aspirin-reactivity unit (ARU) and P2Y(12)-reactivity unit (PRU) were measured from 0 days (day 0, no discontinuation) to as long as 5 days (day 5, 5 days after discontinuation) depending on each procedure schedule. For 15 patients, baseline ARU and PRU (592 and 288) before aspirin/clopidogrel loading at index percutaneous coronary intervention were collected as control. For ARU after discontinuation of APA, days 0 to 5 values progressively increased over time (489.4 T 85.3, 512.6 T 77.0, 589.9 T 58.8, 613.6 T 47.3, 632.6 T 49.2, 662.0 T 4.2). Likewise, for PRUs, days 0 to 5 values also increased over time (245.0 T 96.9, 253.9 T 80.9, 270.9 T 45.8, 289.0 T 68.6, 306.5 T 29.2, 351.0 T 8.5). The ARU and PRU well correlated with days after APA discontinuation by linear regression analysis ( y = 490.897 + 39.238 * x, R(2) = 0.43, P G 0.001; y = 241.739 + 16.701 * x, R(2) = 0.092, P = 0.018, respectively). Assuming baseline ARU and PRU as 592 and 288, the mean days after complete reversal of platelet reactivity by APAs are 2.6 and 2.8, respectively.
Conclusions: The feasible timing of NCP after discontinuation of APAs showed less than 5 days. VerifyNow is useful in the evaluation of antiplatelet reversal after discontinuation of APAs. .
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| http://dx.doi.org/10.2310/JIM.0000000000000070 | DOI Listing |
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