Vascular Surgery / Stony Brook Vascular Center

Our vascular surgeons have been recognized for their clinical excellence by selection for inclusion in the Castle Connolly Guide, Top Doctors: New York Metro Area, representing the top 10% of physicians in the New York Metropolitan area, as well as by inclusion in the Consumers' Research Council of America Guide to America's Top Surgeons.

The Society for Vascular Surgery's Vascular Quality Initiative (SVS VQI) has awarded Stony Brook Medicine three stars — the top rating — for its active participation in the Registry Participation Program. This is the second year in a row Vascular Surgery has been awarded three stars and recognized for their focus on continuous improvement in patient care.

Due to the exceptional care of our vascular surgeons,  the Stony Brook Aortic Center is the first facility on Long Island to have a patient receive a new stent graft device that has just been approved for the treatment of aortic dissections. (read more)

team 2019
Our vascular faculty: (left to right) Shang A. Loh, David S. Landau, Apostolos K. Tassiopoulos, Angela A. Kokkosis, Antonios P. Gasparis, Nicos Labropoulos, and Mohsen Bannazadeh (click on photo to enlarge). 
Want to learn more?

For consultations/appointments, please call (631) 638-1670 (Vascular Center)

or contact the Center for Vein Care at (631) 444-VEIN (8346)


Clinical Support Staff

Administrative Staff

Apostolos K. Tassiopoulos, MD

Chief, Vascular and Endovascular
Surgery Division

Julia Motl, NP, Physician Extender

Alexa DiMaria

Mohsen Bannazadeh, MD

Olympia Christoforatos, RN, MS, Nurse Navigator

Rosemary Marsh

George J. Koullias, MD, PhD

Carole Paradise, PA, Physician Extender

Christine Collins

Antonios P. Gasparis, MD

Director, Center for Vein Care

Nancy Fenster, RN, Nurse Manager, Vascular Center (Centereach)

Joanne Carnaxide

David S. Landau, MD

Ali Jackson, PA, Physician Extender 

Jessica Jacobs

Angela A. Kokkosis, MD

Brittany Anderson, PA, Physician Extender 

Panagiota Kanakaki

Shang A. Loh, MD

Krystal Kane, PA, Physician Extender 

Helene Long

Vascular Physiologist

Tara McSweeney, NP, Physician Extender 

Carrine Hunte

Nicos Labropoulos, PhD- 

Director, Non-Invasive Vascular Laboratory

Jessica Norton, RVT, Outpatient Vascular Lab Director



Kristy Stanfield, PA, Physician Extender


  Carleen Conde, NP, Physician Extender  

The Stony Brook Vascular Center, is a spacious facility built to support our growing clinical practice. It is designed to offer our patients clinical evaluation with the most advanced diagnostic tests and state-of-the-art procedure rooms for minimally invasive office-based procedures.

Our team provides specialized services for a wide variety of circulatory disorders. Our surgeons perform reconstructive procedures for occlusive and aneurysmal diseases. They have special expertise in:

Aneurysms and strokes can strike suddenly and without warning. That's why it's best to identify and treat underlying causes before symptoms appear. Learn about our vascular disease screenings today!

Demonstrating our commitment to providing the latest advances in patient care, our program in minimally invasive endovascular surgery offers a scope of diagnostic and treatment options which are unique in Suffolk County. At our Center for Vein Care — fully accredited by the Intersocietal Accreditation Commission — with offices in Centereach, Commack, Patchogue, Hampton Bays, and Southampton, our vascular specialists provide treatment for:

  • Acute deep vein thrombosis
  • Chronic venous thrombosis
  • Pelvic congestion syndrome
  • Varicose and spider veins
  • Venous ulcerations

Our specialists use the latest surgical and non-surgical techniques to treat varicose veins and spider veins of the leg, including new minimally invasive "endovenous" techniques that let patients get back to their normal activities in usually just a couple of days. No general anesthesia or hospitalization is required. Learn more on the Center for Vein Care's Facebook page.

For the evaluation and treatment of chronic leg and foot ulcers, they provide comprehensive wound care management.

Following is a comprehensive, but not all-inclusive, list of services provided by the Division of Vascular Surgery at Stony Brook Medicine.

  • Abdominal Aortic Aneurysm (AAA) Repair
  • Amputation
  • Angioplasty/Stenting
  • Atherectomy
  • Carotid Endarterectomy
  • Carotid Stenting
  • Compression Stockings
  • Dialysis Access
  • Drug Therapy for Varicose Veins
  • Embolization
  • Embolotherapy
  • Endarterectomy
  • Endovascular Abdominal Aortic Aneurysm (AAA) Repair
  • Endovascular Stent Graft
  • Endovascular Thoracic Aortic Aneurysm Repair
  • Endovenous Laser Treatment (EVLT)
  • Incisionless AAA Repair
  • Laser Therapy for Varicose Veins
  • Lower Extremity Vascular Reconstruction
  • Medications
  • Mesenteric Ischemia Surgery
  • Minimally Invasive Surgery
  • Percutaneous Closure for Varicose Veins
  • Portal Hypertension Surgery
  • Radiofrequency Ablation (RFA)
  • Sclerotherapy
  • Skin Graft
  • Surgery for Diabetic Foot Ulcers
  • Surgery for Stroke Prevention
  • Surgical Aneurysm Repair
  • Surgical Bypass
  • Thoraco-Abdominal Surgery
  • Thrombolysis
  • Transcarotid Artery Revascularization (TCAR)
  • Treatment of Hypertension
  • Vascular Disease Screenings
  • Varithena
  • Vein Ablation
  • Vein Stripping
  • Vena Cava Filters
  • VenaSeal
  • Venous Access
  • Venous Thrombectomy
  • Wound Care

Following is a comprehensive, but not all-inclusive, list of conditions we treat in the Division of Vascular Surgery at Stony Brook Medicine.

  • Abdominal Aortic Aneurysm (AAA)
  • Aortic Arch Conditions
  • Aortoiliac Occlusive Disease
  • Arm Artery Disease
  • Carotid Artery Disease
  • Chronic Pelvic Pain
  • Chronic Ulcers of the Leg/Foot
  • Chronic Venous Insufficiency
  • Chronic Venous Thrombosis
  • Deep Vein Thrombosis (DVT)
  • Diabetic Vascular Disease
  • Digital Artery Conditions
  • Hyperlipidemia
  • Hypertension
  • Leg Artery Disease
  • Liver Disease
  • Lymphedema
  • Pelvic Venous Incompetence
  • Peripheral Artery Disease (PAD)
  • Portal Hypertension
  • Pulmonary Embolism
  • Renal Failure
  • Renovascular Conditions
  • Stroke
  • Thoracic Aneurysm
  • Thoracic Outlet Syndrome
  • Varicose and Spider Veins
  • Vascular Malformations
  • Venous Ulcerations
  • Visceral Artery Conditions

To provide the best possible patient care, our Vascular Surgery Service uses the Non-Invasive Vascular Laboratory of Stony Brook University Hospital. The Non-Invasive Vascular Laboratory houses a wide variety of state-of-the-art equipment, including Duplex scanners and transcranial Doppler units, used not only as aids in the diagnosis of circulatory disorders, but also in the follow-up of a large number of outpatients.

Our Non-Invasive Vascular Laboratory is complemented by an excellent special procedures division of the radiology department, which likewise has the latest in angiography equipment and CT scanners, at University Hospital.

The special procedures division provides service in all the techniques of interventional radiology, including balloon dilatation (angioplasty), invasive pressure monitoring, and therapeutic embolization.

The Non-Invasive Vascular Laboratory at Stony Brook Medicine performs sophisticated non-invasive cerebral, peripheral, and abdominal vascular studies. Our lab is fully accredited by the Intersocietal Accreditation Commission (IAC) (formerly, Intersocietal Commission for the Accreditation of Vascular Laboratories, or ICAVL).

Meeting the high standards set by the ICA demonstrates our lab's commitment to excellence and quality assurance in vascular testing.


Non-invasive vascular evaluations offer a number of advantages. These sophisticated tests are painless and can document the presence, location, and severity of arterial and venous vascular disease. In addition, the non-invasive nature of the exam greatly reduces patient risk and enhances patient comfort when compared to invasive diagnostic procedures. These tests are also cost-effective, an important consideration in today's healthcare environment.

Service-Oriented Approach

The Non-Invasive Vascular Laboratory takes a "service-oriented" approach to physicians and patients. This is exemplified by:

Rapid Report Turn-Around Time
Positive preliminary reports are immediately communicated to the referring physician either by telephone or fax. Final reports interpreted by our distinguished physician panel are mailed to the referring physician's office within 48 to 72 hours of the study. Our physicians are available for consultation regarding a study during hours of operation.

Sensitivity to Patient Needs
Each patient referred to the Non-Invasive Vascular Laboratory is treated as an individual with specific needs. Vascular technologists obtain a complete problem-focused history, thoroughly explain the procedure, and help the patient relax by carefully describing the test as it is being performed.

Comprehensive Evaluation
Each comprehensive vascular evaluation includes a complete problem-focused history, performance of the test with hard copy and/or video recording of the data, physician-interpreted results and readily available reports.

State-of-the-Art Technology

The Non-Invasive Vascular Laboratory features the latest technology available in the field. This includes:

Direct Studies
Colorflow duplex ultrasonography is utilized to evaluate the arterial and venous systems. This technology combines three ultrasound modalities:

1. Two-dimensional B-mode ultrasound imaging in gray scale provides anatomic information about the vessels of interest. The presence or absence of atherosclerotic plaque or thrombus is detected using this modality.

2. Doppler ultrasound provides physiologic information about blood flow in the vessel. Using this modality, a Doppler velocity spectral analysis is obtained, which can determine whether plaque or thrombus is hemodynamically significant and compromising blood flow.

3. Colorflow ultrasound provides the ability to quickly visualize blood flow and demonstrate the degree of vessel obstruction.

Indirect Studies
Indirect studies also play a key role in non-invasive vascular evaluations. These tests include digital plethysmographic analysis for evaluation of perfusion, spectral waveform analysis for characterization of the Doppler velocity signals, and segmental Doppler systolic pressures.

Below are clinical conditions that indicate the need for non-invasive vascular studies:


  • Amaurosis fugax
  • Atypical central nervous system symptoms
  • Carotid bruit
  • Follow-up of carotid stenosis
  • Non-hemispheric cerebral ischemic symptoms
  • Post-surgical evaluation for carotid restenosis
  • Prior to heart or major surgeries in selected cases
  • Question of carotid dissection
  • Question of carotid aneurysm
  • Stroke
  • Subclavian steal
  • TIA (transischemic attack)
  • Vague symptoms of light-headedness, dizziness or syncope
  • Vertebral basilar symptoms
  • Vertebral occlusive disease

Abdominal Vessels

  • Abdominal aortic aneurysm
  • Abdominal bruit
  • Aortoiliac occlusive disease
  • Follow-up of aortic, renal, mesenteric or iliac stenosis
  • Follow-up of renal or iliac angioplasty/stent procedures
  • Iliac vein or caval thrombosis
  • Ischemic nephropathy
  • Mesenteric ischemia
  • Post-surgical evaluation of aortic, renal or mesenteric grafts
  • Post-surgical evaluation of aortic, renal, mesenteric or iliac stenosis
  • Renovascular hypertension

Peripheral Venous

  • Chronic venous insufficiency, reflux/valvular incompetence
  • Follow-up during and after anti-coagulant therapy
  • Observation of high-risk patient groups for development of deep venous thrombosis (e.g., pregnant females, cancer patients)
  • Suspected deep venous thrombosis or superficial phlebitis
  • Varicose veins
  • Vein mapping for coronary or peripheral arterial reconstruction
  • Venous evaluation prior to implantation of various access devices (e.g., catheters, lines)

Peripheral Arterial

  • Bypass graft follow-up
  • Diminished or absent peripheral pulses
  • Evaluation of degree of claudication, if present
  • Evaluation of medical management
  • Leg pain of questionable etiology
  • Non-healing foot/toe lesions
  • Peripheral aneurysm evaluation
  • Rest pain (diabetic neuropathy versus ischemia)
  • Trauma to peripheral artery
  • Vasospastic disorders


For information about these and other related conditions we treat, please visit the online Health Library of Stony Brook University Hospital.

Click here to learn about our vascular screening program. Watch these new videos about the program and two of our grateful patients:

Why Our Vascular Screening Program (0:30 min)
Testimonials of Two Grateful Patients (5:20 min)