Site Map

Blood clots

Clot; Emboli; Thrombi; Thromboembolus; Hypercoagulable state

Blood clots are clumps that occur when blood hardens from a liquid to a solid.

A thrombus or embolus can partly or completely block the flow of blood in a blood vessel.

Images

Thrombus
Deep venous thrombosis, ileofemoral

I Would Like to Learn About:

Causes

Situations in which a blood clot is more likely to form in veins include:

Blood clots are also more likely to form after an injury. People with cancer, obesity, and liver or kidney disease are also prone to blood clots.

Smoking also increases the risk of forming blood clots.

Conditions that are passed down through families (inherited) may make you more likely to form abnormal blood clots. Inherited conditions that affect clotting are:

Other rare conditions, such as protein C, protein S, and antithrombin III deficiencies.

A blood clot may block an artery or vein in the heart, affecting the:

Related Information

Hardening of the arteries
Arterial embolism
Pulmonary embolus
Deep vein thrombosis
Renal vein thrombosis
Atheroembolic renal disease
Thrombophlebitis
Stroke
Heart attack
Angina
Necrosis
Venogram
Limb plethysmography
Taking warfarin (Coumadin, Jantoven) - what to ask your doctor
Taking warfarin (Coumadin)
Deep vein thrombosis - discharge

References

Anderson JA, Hogg KE, Weitz JI. Hypercoagulable states. In: Hoffman R, Benz EJ, Silberstein LE, et al, eds. Hematology: Basic Principles and Practice. 7th ed. Philadelphia, PA: Elsevier; 2018:chap 140.

Schafer AI. Thrombotic disorders: hypercoagulable states. In: Goldman L, Schafer AI, eds. Goldman-Cecil Medicine. 25th ed. Philadelphia, PA: Elsevier Saunders; 2016:chap 176.

BACK TO TOP

Review Date: 5/14/2018  

Reviewed By: Preeti Sudheendra, MD, oncologist at the MD Anderson Cancer Center at Cooper, Camden, NJ. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.

ADAM Quality Logo

A.D.A.M., Inc. is accredited by URAC, for Health Content Provider (www.urac.org). URAC's accreditation program is an independent audit to verify that A.D.A.M. follows rigorous standards of quality and accountability. A.D.A.M. is among the first to achieve this important distinction for online health information and services. Learn more about A.D.A.M.'s editorial policy, editorial process and privacy policy. A.D.A.M. is also a founding member of Hi-Ethics. This site complies with the HONcode standard for trustworthy health information: verify here.

The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- 2019 A.D.A.M., a business unit of Ebix, Inc. Any duplication or distribution of the information contained herein is strictly prohibited.

A.D.A.M. content is best viewed in IE9 or above, Firefox and Google Chrome browser.