Society of Interventional Radiology: Understand long-term risks of DVT

(Press-News.org) FAIRFAX, Va.—Deep vein thrombosis (DVT) often brings with it the risk of post-thrombotic syndrome (PTS), an under-recognized but serious complication that often causes long-term disability for patients. During March's DVT Awareness Month, the Society of Interventional Radiology wants to help patients and family members to better understand the long-term risks of DVT.

DVT, the formation of a blood clot in a deep leg vein, is a grave condition for which doctors have historically focused on its short-term risks. "For years, if someone developed deep vein thrombosis, his or her care was focused on reducing immediate harm using blood-thinning drugs; however, the prevention of post-thrombotic syndrome, which is actually the primary determinant of a DVT patient's long-term quality of life, had been neglected," said Suresh Vedantham, M.D., FSIR, an interventional radiologist and SIR service line officer. "The evidence is mounting that interventional radiologists may soon transform the way we treat DVT in a way that improves patients' quality of life and prevents the debilitating consequences of post-thrombotic syndrome," said Vedantham, who is professor of radiology and surgery at Washington University School of Medicine in St. Louis, Mo.

Anticoagulants do not actively dissolve a blood clot; they just prevent new clots from forming, he explained. The body will sometimes eventually dissolve a clot, but often the vein becomes damaged. A significant proportion of DVT patients develop irreversible damage in the affected leg veins and their valves, resulting in abnormal pooling of blood in the leg, chronic leg pain, fatigue, swelling, and, in extreme cases, severe skin ulcers.

"For a long time, doctors have believed that the use of compression stockings can prevent PTS; however, a rigorous study of compression stockings, published recently, shows that this is not the case," said Vedantham. On the other hand, a randomized trial evaluating the use of clot removal with interventional catheter-directed thrombolysis—a treatment performed by interventional radiologists who guide a catheter or specialized device into a leg vein and thread it into the vein containing the clot and a "clot-busting" drug is infused directly into the clot—found a significant reduction in PTS. Since catheter-directed thrombolysis is most effective when performed within 14 days after DVT symptoms begin, he recommends that a second opinion from an interventional radiologist be sought if leg pain and swelling continue beyond seven days after treatment is started. "Individuals who received these treatments experienced fewer long-term symptoms and significantly less time lost from work," said Vedantham, who is also the principal investigator for the National Institutes of Health-sponsored ATTRACT Trial, the most rigorous U.S.-based study of these new treatments.INFORMATION: Information about the Society of Interventional Radiology, DVT and post-thrombotic syndrome, finding an interventional radiologist and minimally invasive treatments can be found online at http://www.SIRweb.org. In light of new research, SIR will also soon be issuing revised DVT guidelines that seek to improve the quality of care patients receive. During SIR's Annual Scientific Meeting March 22–27 in San Diego, attendees will hear about venous thromboembolic disease and acute DVT care and have the opportunity to take an in-depth look at complex issues in patients suffering from superficial and deep venous disease.

About the Society of Interventional Radiology

Interventional radiologists are physicians who specialize in minimally invasive, targeted treatments. They offer the most in-depth knowledge of the least invasive treatments available coupled with diagnostic and clinical experience across all specialties. They use X-ray, MRI and other imaging to advance a catheter in the body, such as in an artery, to treat at the source of the disease internally. As the inventors of angioplasty and the catheter-delivered stent, which were first used in the legs to treat peripheral arterial disease, interventional radiologists pioneered minimally invasive modern medicine. Many conditions that once required surgery can be treated less invasively by interventional radiologists. Interventional radiology treatments offer less risk, less pain and less recovery time compared to open surgery. Visit http://www.SIRweb.org.