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You are here: Contents > 2016 > Volume 25 Number 5 September 2016 > DEVICE EVALUATION > Dysfunction of an On-X Heart Valve by Pannus

Dysfunction of an On-X Heart Valve by Pannus

Cipriano Abad1,3, Stefano Urso1, Elsa Gomez2, Maria De la Vega2

1Cardiac Surgery Service, Hospital Universitario de Gran Canaria Dr. Negrin, Las Palmas de Gran Canaria, Spain
2Pathology Service, Hospital Universitario de Gran Canaria Dr. Negrin, Las Palmas de Gran Canaria, Spain
3Electronic correspondence: cprnabad2@gmail.com

A 68-year-old woman with a history of previous double-valve replacement with On-X mechanical heart valves presented with clinical, echocardiographic and cardiac catheterization signs of obstruction of the On-X tricuspid heart valve prosthesis. The patient was successfully reoperated, but at surgery the valve was seen to be invaded by an abnormal overgrowth of pannus that blocked one of the leaflets. A small amount of non-obstructive fresh thrombus was also observed. The valve was successfully

replaced with a biological heart valve prosthesis. The patient was discharged home, and is doing well four months after the operation, when echocardiography demonstrated normal function in the tricuspid valve. The present case represents the first ever report of pannus formation and subsequent dysfunction in an On-X heart valve, and also the first case of tricuspid valve malfunction and obstruction using this type of heart valve substitute

The Journal of Heart Valve Disease 2016;25:634-637


Dysfunction of an On-X Heart Valve by Pannus

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