Published in:
01-10-2018 | Letter to the Editor
How to perform and manage low-dose and slow/ultra-slow tissue type plasminogen activator infusion regimens in patients with prosthetic valve thrombosis
Authors:
Ahmet Guner, Macit Kalcik, Mustafa Ozan Gursoy, Sabahattin Gunduz, Mehmet Ozkan
Published in:
Journal of Thrombosis and Thrombolysis
|
Issue 3/2018
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Excerpt
Over the last two decades, thrombolytic therapy (TT) has become an alternative to surgery as a first-line therapy in patients with thrombosed mechanical valves [
1‐
3]. In TROIA Trial, low dose (25 mg)—slow infusion (6 h) of tissue type plasminogen activator (t-PA) has been found to be an effective and safe regimen in the management of prosthetic valve thrombosis (PVT) [
4]. Accelerated and high dose TT regimens were associated with higher complication and mortality rates. 2014 AHA/ACC guideline for the management of patients with valvular heart disease had recommended emergency surgery for patients with left-sided PVT with NYHA Class III-IV (Class 1-B) and large, mobile thrombus(> 0.8 cm
2) (Class 2a). Additionaly, TT was reasonable for patients with a thrombosed left-sided prosthetic heart valve, recent onset (< 14 days) of NYHA class I to II symptoms, and a small thrombus (< 0.8 cm
2)(Class 2a) [
5]. 2017 AHA/ACC Focused Update of the 2014 AHA/ACC Guideline for the Management of Patients with Valvular Heart Disease now recommends urgent initial treatment with either slow-infusion low-dose TT or emergency surgery for obstructive PVT as first-line treatment strategies with class 1-B indication [
6]. Based on our experience regarding TT [
3,
4,
7], low dose and ultra-slow infusion (25 mg/25 h) of the TT regimen could be associated with lower complication rates. Recently, the ultra-slow PROMETEE Trial has demonstrated that ultra-slow (25 h) infusion of low dose (25 mg) t-PA without bolus appears to be associated with quite low non-fatal complications and mortality for PVT patients without loss of effectiveness, except for those with NYHA class-IV [
8]. …