The Antithrombotic Therapy and Prevention of Thrombosis, 9th ed: American College of Chest Physicians Evidence-Based Clinical Practice Guidelines include more than 600 recommendations for the prevention, diagnosis, and treatment of thrombosis, addressing a comprehensive list of clinical conditions, including medical, surgery, orthopedic surgery, atrial fibrillation, stroke, cardiovascular disease, pregnancy, and neonates and children.

The guidelines are published as a supplement to the February 2012 issue of CHEST and are available in print, online, and through mobile devices. A corresponding editorial can also be found in the February 2012 issue of CHEST.
The print issue contains the following three articles, inclusive of all recommendations:
The print issue can be ordered online through the ACCP Store.
The complete guidelines — inclusive of detailed articles on individual topics, evidence profile tables, and more — is available in the online version of the February 2012 supplement to CHEST.

Accessing via the CHEST app for the iPhone® and iPad®
The full guidelines can be accessed via the CHEST journal app for the iPhone and iPad. To access the guidelines through the app, you must have a subscription to CHEST and log in through the CHEST journal app. Subscriptions cannot be obtained through the app.
After logging in:

Accessing via CHEST Mobile Website
To access the full guidelines on the mobile site, you must have a subscription to CHEST and be logged in. Subscriptions cannot be obtained through the mobile website. CHEST subscribers can access the guidelines through the CHEST mobile website by following these simple steps:
This edition of the guidelines reflects a number of innovative procedural and methodologic advancements that have resulted in many changes in the recommendations, both clinically and in terms of the strength of the recommendations.
This clinical resource is a series of educational slide sets for physicians, each set corresponding to the recommendations in chapters in the ninth edition of the ACCP antithrombotic guidelines. Physicians may incorporate any slides from these sets into their own presentations to explain and share the recommendations of the AT9 guidelines with other colleagues.

Quick reference guides will be available for download and include a list of each recommendation by patient population, recommendation, and grade. The guides correspond with the guideline articles.
Listen to podcasts that feature discussions on methodology and key recommendations related to the ACCP Antithrombotic Guidelines, 9th ed.:
Advancing Evidence-Based Medicine: ACCP Methodology
with Gordon H. Guyatt, MD, FCCP and Ian T. Nathanson, MD, FCCP
New Drugs, New Recommendations: What Clinicians Must Know
with Mark A. Crowther, MD, and David A. Garcia, MD
Access podcasts on the CHEST Web site.
Easily reference the ACCP Antithrombotic Guidelines, 9th ed, at the point-of-care with convenient guideline pocket cards. This practical tool contains screening, diagnostic, and treatment algorithms; drug therapy; dosing information; patient monitoring; and counseling points for antithrombotic therapy. The pocket cards are available for purchase and cover select antithrombotic guideline topics.
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Stroke Prevention in Atrial Fibrillation Guidelines Pocketcard |
New DVT Guidelines: No Evidence to Support “Economy Class Syndrome”
New Guidelines Suggest DVT Prophylaxis Not Appropriate for All Patients
Learn more about additional ACCP evidence-based guidelines and consensus statements and related courses on the methodology of guideline development.

A patient education guide series is available for download from OneBreath®, an initiative of The CHEST Foundation, the philanthropic arm of the ACCP. The patient education guides include frequently asked questions that patients may have about clinical recommendations within the ACCP Antithrombotic Guidelines, 9th ed, and corresponding answers in lay terms.
Learn more about the ACCP Antithrombotic Guidelines, 9th ed, patient education guides.
Rank | Definition |
|---|---|
| 1 | This guideline is new and represents the best available evidence at this time. It will be reviewed on an annual basis to determine if it remains current. |
| 2 | This guideline is reviewed on an annual basis and there have been new studies published since the guideline was developed. However, the Guidelines Oversight (GOC) Committee determined that these studies are not sufficient to warrant changing the guideline at this time. The information contained in this guideline provides the user with the best evidence available at the time the guideline was published. Readers are encouraged to search the current literature as a supplement to using this guideline. |
| 3 | This guideline is reviewed on an annual basis. The GOC determined that new studies have been published that warrant an update of the (fill in) chapter/section of this practice guideline. The GOC also determined that the remainder of the chapters/sections does not require updating and these recommendations remain current. |
| 4 | This guideline is reviewed on an annual basis. The GOC determined that new data are available that are sufficient to potentially change guideline recommendations and a full revision is warranted. |
| 5 | This guideline has been reviewed on an annual basis. The GOC has decided it is outdated; however, it has been retained for historical and/or educational purposes. These guidelines should be used with caution for clinical decision-making purposes. |
The evidence-based practice guidelines published by The American College of Chest Physicians (“ACCP”) incorporate data obtained from a comprehensive literature review of the most recent studies available at the time of publication. Guidelines are intended for general information only, are not medical advice, and do not replace professional medical care and physician advice, which always should be sought for any specific condition. Furthermore, guidelines may not be complete or accurate because new studies that may have become available late in the process of guideline development may not be incorporated into any particular guideline before it is disseminated. ACCP and its officers, regents, governors, executive committee, members and employees (the “ACCP Parties”) disclaim all liability for the accuracy or completeness of a guideline, and disclaim all warranties, express or implied. Guideline users always are urged to seek out newer information that might impact the diagnostic and treatment recommendations contained within a guideline. The ACCP Parties further disclaim all liability for any damages whatsoever (including, without limitation, direct, indirect, incidental, punitive, or consequential damages) arising out of the use, inability to use, or the results of use of a guideline, any references used in a guideline, or the materials, information, or procedures contained in a guideline, based on any legal theory whatsoever and whether or not there was advice of the possibility of such damages.