Our UHN programs and services are among the most advanced in the world. We have grouped our physicians, staff, services and resources into 10 medical programs to meet the needs of our patients and help us make the most of our resources.
University Health Network is a health care and medical research organization in Toronto, Ontario, Canada. The scope of research and complexity of cases at UHN has made us a national and international source for discovery, education and patient care.
Our 10 medical programs are spread across eight hospital sites – Princess Margaret, Toronto General, Toronto Rehab’s five sites, Toronto Western – as well as our education programs through the Michener Institute of Education at UHN. Learn more about the services, programs and amenities offered at each location.
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Find out how to get to and around our nine locations — floor plans, parking, public transit, accessibility services, and shuttle information.
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The mitral valve is one of four heart valves. Located on the left side of the heart, it allows for the smooth passage of blood from the left atrium to the left ventricle, and prevents the reversal of blood flow back into the left atrium. The left ventricle pumps blood into the aorta, where it is distributed throughout the body.
Mitral valve dysfunction can manifest either as regurgitation – a "leaky" valve – or valve stenosis, a narrowing of the valve. Both disorders can lead to blood pooling in the lungs and legs causing shortness of breath, swelling in the legs, and fatigue.
Mitral regurgitation is the most common mitral valve disease. 95% of mitral valve regurgitation cases can be treated with surgical repair or reconstruction of the valve.
Mitral valve stenosis restricts the normal opening of the valve. If the valve does not have any calcification, it can be opened via a balloon valvuloplasty in the cath lab. Valves with calcification can be treated with surgery in select cases. Calcified valves have to be surgically replaced with a biological or mechanical valve.
Minimally invasive mitral valve surgery is performed through a small incision (4-5 cm) in the patient's right ribcage, providing direct access to the heart. A 3D thoracoscope provides a magnified 3D view of the mitral valve.
This technique can be used for: