Andrew Brown MD

Andrew Brown MD

Home Media and Publications

Dr. Andrew Brown looks intently at the screen while performing Dave McManus’ radioembolization treatment.

Dr. Andrew Brown looks intently at the screen while performing Dave McManus’ radioembolization treatment.

Media and Publications

Here, you’ll find featured articles, interviews, and research highlights showcasing my work in vascular medicine and interventional radiology. From breakthrough treatments to insights on post-thrombotic syndrome and venous disease management, this section offers a closer look at the impact of my research and clinical practice.

Pelvic venous disorders and orthostatic intolerance: A systematic review of diagnostic associations and treatment outcomes

Possible pathophysiological relationship between PeVD and OI. Nutcracker syndrome occurs when the left renal vein is compressed between the superior mesenteric artery and the abdominal aorta, impeding renal and systemic venous outflow. May-Thurner syndrome results from compression of the left common iliac vein by the overlying right common iliac artery, reducing venous drainage from the pelvis and lower extremities. Venous insufficiency reflects valve damage and venous laxity in peripheral veins, leading to abnormal retrograde flow and pooling. Collectively, these conditions promote infra-diaphragmatic venous pooling, diminished preload, and compensatory sympathetic activation, which can trigger orthostatic intolerance (OI) phenotypes such as postural tachycardia syndrome (POTS), orthostatic hypotension (OH), or dizziness and fatigue.

In: Imami, M. R., Galdino, V. D. S., Harvey, P., Selke, M. S., Barr, M., & Brown, A. D. (2026). Pelvic venous disorders and orthostatic intolerance: A systematic review of diagnostic associations and treatment outcomes. Autonomic Neuroscience, 103451.

Imaging-Based Approach to Venous-Origin Chronic Pelvic Pain

Nineteen year old female with 3 months of pelvic cramps. Transabdominal ultrasound under Valsalva manoeuvre demonstrating prominent left gonadal veins, with reversed venous flow on colour doppler.

In: Moosa, V., Ni, T., Friedman, I., & Brown, A. D. (2025). Imaging-based approach to venous-origin chronic pelvic pain. Canadian Association of Radiologists Journal, 76(4), 782-792.

A Canadian first: New device helps to tackle challenging deep vein thrombosis cases

Citation: Unity Health Toronto Public Relations & Communications (Photo credit: Yuri Markarov)

New device for blood clot treatment helps patients avoid surgery at St. Michael’s Hospital

Citation: Unity Health Toronto Public Relations & Communications (Photo credit: Andrew Brown)

‘The future of cancer therapy’: An innovative treatment performed at St. Michael’s Hospital for the first time

Citation: Unity Health Toronto Public Relations & Communications (Photo credit: Eduardo Lima)