European Journal of Cardio-Thoracic Surgery, Vol 3, 178-183, Copyright © 1989 by European Association for Cardio-thoracic Surgery
Fibrinolytic treatment of acute prosthetic heart valve thrombosis. 5 cases and a review
GA Wilkinson and WG Williams
Cardiothoracic Surgical Unit, Walsgrave Hospital, Coventry, UK.
Acute thrombotic obstruction of prosthetic heart valves has usually needed
an emergency operation and carries a high mortality. Over the past 16
years, sporadic papers have appeared reporting the successful use of
fibrinolytic therapy with a low mortality. We report five consecutive cases
treated in this way. The diagnosis of valve thrombosis was made on
clinical, echocardiographic and cineradiographic grounds. Treatment
consisted of streptokinase (SPK) in a loading dose of 250,000 units in one
case and 500,000 units in the remaining four cases, followed by 100,000
units hourly. Rapid improvement in clinical state was seen in all five
patients. Four patients recovered completely and have been followed up for
a minimum of 3 years. One patient died of a retroperitoneal haemorrhage, a
recognised complication of fibrinolytic therapy. A review of the literature
is presented. Fibrinolytic therapy is recommended in the acute episode and
should result in either a return to normal valve function or sufficient
improvement in haemodynamics to allow semielective surgery at considerably
lower risk.