Many people suffer from chronic left leg swelling, heaviness, or recurrent blood clots without ever realizing the root cause is structural. May-Thurner Syndrome—also known as Cockett syndrome or iliac vein compression syndrome—is a frequently underdiagnosed vascular condition that disrupts normal blood flow in the pelvis. At Memphis Vein Center, we specialize in identifying and treating this condition to restore proper circulation and protect you from dangerous complications.
Led by Dr. Kishore K. Arcot—a multi-board-certified interventional cardiologist and vascular specialist—our team combines top-tier clinical expertise with a compassionate, patient-focused approach to solve complex vascular puzzles.
To understand May-Thurner Syndrome, it helps to look at how blood vessels cross over each other in the pelvis. Normally, your arteries carry oxygen-rich blood down to your legs, and your veins carry oxygen-poor blood back up to your heart.
In your pelvis, the right iliac artery (the main blood vessel supplying your right leg) naturally crosses over the left iliac vein (the main blood vessel draining your left leg).
The Problem: In individuals with May-Thurner Syndrome, the right iliac artery abnormally presses against the left iliac vein.
The Hose Effect: This compression is much like stepping on a garden hose. The left iliac vein narrows, making it incredibly difficult for blood to flow freely out of your left leg and back to your heart.
While mild iliac vein compression is estimated to occur in about 1 in 5 people, many never receive a formal diagnosis until symptoms appear. The syndrome is most commonly diagnosed in adults between the ages of 20 and 50, and it is slightly more prevalent in females. In some women, the trapped pelvic blood flow can also lead to pelvic congestion syndrome, causing chronic pelvic pain.
Because this mechanical bottleneck specifically pinpoints the left side of the pelvis, symptoms typically only affect your left leg. Many people remain completely asymptomatic until the sluggish, pooling blood triggers a serious secondary condition: Deep Vein Thrombosis (DVT), or a deep leg blood clot.
Watch for these warning signs in your left leg:
Persistent swelling and a distinct feeling of heaviness or tightness
Chronic leg pain, throbbing, or unexplained tenderness
Skin discoloration or visible varicose veins
Chronic, open sores (venous ulcers) that refuse to heal near the ankle
A Critical Warning Sign: A blood clot (DVT) caused by May-Thurner Syndrome can break free and travel to your lungs. This is called a pulmonary embolism—a life-threatening medical emergency requiring immediate intervention.
Because May-Thurner Syndrome occurs deep within the pelvis, standard superficial examinations are rarely enough. At Memphis Vein Center, Dr. Arcot utilizes advanced vascular imaging techniques to accurately confirm a diagnosis:
Vascular Ultrasound: A painless, non-invasive first step to check for blood clots and evaluate blood flow in the leg and lower pelvis.
Advanced Venograms & Intravascular Ultrasound (IVUS): To definitively diagnose the compression, Dr. Arcot may perform a catheter-based venogram. By introducing a tiny catheter into the vein and utilizing a miniature ultrasound probe from inside the blood vessel, he can visually map the exact degree of narrowing with exceptional precision.
Treatment at Memphis Vein Center focuses on relieving the physical compression, restoring normal upward blood flow, and aggressively reducing your risk of developing blood clots.
While severe cases historically required open bypass surgeries to reroute blood flow or shift the compressing artery, Dr. Arcot specializes in highly successful, minimally invasive endovascular procedures performed on an outpatient basis:
Angioplasty and Stenting: Dr. Arcot guides a tiny catheter equipped with a balloon directly to the compressed site in your left iliac vein. The balloon is gently inflated to widen the narrowed vessel, and a small, permanent mesh tube (stent) is placed to prop the vein open. The balloon is removed, leaving the stent to permanently resist the pressure of the overlapping artery.
If a blood clot is already present due to May-Thurner Syndrome, Dr. Arcot may expand your treatment protocol to include:
Targeted Anticoagulant Medications: Evidence-based blood thinners to prevent new clots from forming.
Catheter-Directed Thrombolysis: Delivers specialized “clot-busting” medications directly into the clot via a catheter to actively dissolve it.
Vena Cava Filters: A small device safely placed in your body’s main vein to trap traveling clots before they can reach your lungs.
If you suffer from chronic, unexplained left leg swelling or have a history of left-sided DVT, don’t leave your health to chance. Contact Memphis Vein Center today to schedule a comprehensive vascular evaluation with Dr. Arcot, or request an appointment online.
