Skupina pacientů s trombem levé komory: léčba a výsledky v éře přímých perorálních antikoagulancií (LV-Thrombus)
The investigators' primary objective is to assess whether a difference in the occurrence of bleeding events exist between patients with LVT treated with DOACs as compared to those treated with VKAs.
Přehled studie
Postavení
Postavení
Podmínky
Podmínky
Detailní popis
Left ventricular thrombus (LVT) is a well-known complication of left ventricle (LV) systolic dysfunction that can be seen in acute systolic dysfunction, i.e. induced by an acute myocardial infarction (AMI) or Takotsubo cardiomyopathy, and in chronic heart failure with reduced ejection fraction (HFrEF), whatever the cause.
Improvements in the management of AMI, particularly with the implementation of primary percutaneous coronary intervention (PCI), have led to a striking reduction in the occurrence of LVT in patients with AMI from about 30% in the thrombolytic era to about 4% nowadays, according to echocardiographic assessment. On the other hand prognosis of patients with LVT didn't change over time: mortality and risk of embolic events associated with this condition are still high.
A limited amount of evidence shows that oral anticoagulation is associated in the majority of patients with both resolution of LVT and reduction in ischemic events. This benefit comes at the cost of bleeding complications, which have been demonstrated to impact on mortality, especially in patients after AMI receiving an oral anticoagulant on top of a dual antiplatelet therapy (so-called triple antithrombotic therapy).
Current European and American guidelines on treatment of myocardial infarction with ST-elevation do not make strong recommendations for the management of LVT, whereas guidelines on treatment of heart failure do not give any. The European Society of Cardiology recommends an anticoagulation treatment for up to 6 months from diagnosis in case of LVT thrombus after AMI and the decision to continue the therapy after 6 months should be taken on the basis of echocardiographic follow-up (class IIa level of evidence C). The American College of Cardiology and American Heart Association (AHA) gives a similar recommendation (IIaC), however specifically mentioning vitamin K antagonists (VKAs) and a target INR (international normalized ratio) 2.0-2.5 for 3 months on top of dual antiplatelet therapy (DAPT). They also propose to consider an anticoagulant therapy for patients with severe anterior wall motion after STEMI but without LVT (IIbC). The AHA and American Stroke Association published in 2014 their last recommendations for secondary stroke prevention, which are in line with the above mentioned guidelines. Direct oral anticoagulants (DOACs) are mentioned as an alternative to VKAs (IIbC).
All guidelines agree that DOACs for LVT treatment cannot be recommended as first-line therapy because of the scarce evidence, based on case reports small case series and only one large retrospective study (RED VELVT study, published on April 22, 2020).
However, in clinical practice because of the establishment of DOACs over VKAs as first-line therapy to prevent embolic events in patients with atrial fibrillation, those are prescribed off-label to a significant number of patients with LVT. DOACs, as compared to VKAs, showed a greater efficacy regarding prevention of ischemic and hemorrhagic stroke and systemic embolic events in atrial fibrillation, but an increased risk of gastrointestinal bleedings.
The pathophysiology of thrombus formation in a left ventricle with regional wall motion abnormalities and in left atrium with atrial fibrillation is very similar and it implies a blood stasis as main mechanism. Thus one could expect that DOACs, which have been demonstrated to be superior to VKAs in term of prevention of embolic events in atrial fibrillation, have a similar effect on treatment of LVT. However, the first large retrospective study including 541 patients with LVT, of which 421 treated with anticoagulation showed an increased risk of embolic events at 1 year among patients with LVT treated with DOACs as compared to those on VKAs; occurrence of bleeding events was not reported.
Beside the above mentioned uncertainty concerning duration and type of treatment (VKAs versus DOACs) in LVT, there are also some issues concerning the imaging modality used for the diagnosis of LVT. Several studies comparing the diagnostic performance of transthoracic echocardiography (TTE) versus cardiac magnetic resonance (CMR) showed a roughly 30% sensitivity of TTE when taking delayed-enhancement CMR (DE-CMR) as gold standard. With the growing use of CMR, an increasing number of patients are diagnosed with small left ventricular thrombi, which would have been missed in usual clinical practice and which seem to be associated with an embolic risk similar to thrombi detected by TTE.
Typ studie
Typ studie
Zápis (Aktuální)
Zápis
Kontakty a umístění
Studijní místa
-
-
-
Bern, Švýcarsko, 3010
- Department of Cardiology, University Hospital Bern
-
-
Kritéria účasti
Kritéria způsobilosti
Kritéria způsobilosti
Věk způsobilý ke studiu
Přijímá zdravé dobrovolníky
Pohlaví způsobilá ke studiu
Metoda odběru vzorků
Studijní populace
This is an observational, retrospective and prospective, monocentric study including all patients diagnosed with left ventricular thrombus through different imaging modalities (echocardiography, CT or MRI)
Popis
Inclusion Criteria:
- Patients at least 18 years old at enrolment
- With a LVT identified at echocardiography, MRI or CT between January 1st, 2013 and July 31st, 2020
- Treated at least once at the Inselspital or in another site of the Insel Gruppe
- Able to provide a written informed consent
Exclusion Criteria:
- Documented refusal
Studijní plán
Jak je studie koncipována?
Detaily designu
- Observační modely: COHORT
- Časové perspektivy: OTHER
Počet skupin / kohort
Kohorty a intervence
Skupina / kohortaSkupina / kohorta |
|---|
|
Patients diagnosed with left ventricular thrombus
All patients diagnosed with left ventricular thrombus through different imaging modalities (echocardiography, CT or MRI) and who have been diagnosed and/or treated at the Inselspital or another site of the Insel Gruppe. |
Co je měření studie?
Primární výstupní opatření
Primární výstupní opatření
Měření výsledku |
Popis opatření |
Časové okno |
|---|---|---|
|
The occurrence at 1 year of bleeding
Časové okno: 1 year
|
Primary combined endpoint includes the occurrence at 1 year of bleeding BARC (Bleeding Academic Research) Consortium type 2, 3 or 5. |
1 year
|
Sekundární výstupní opatření
Sekundární výstupní opatření
Měření výsledku |
Popis opatření |
Časové okno |
|---|---|---|
|
Rate of patients with arterial systemic embolic event
Časové okno: 1, 2 and 5 years
|
Combined endpoint of arterial systemic embolic event, including ischemic stroke, myocardial infarction, peripheral embolism (e.g. splenic infarction, renal infarction, bowel infarction, acute embolic limb ischemia) at 1, 2 and 5 years. |
1, 2 and 5 years
|
|
Rate of patients with ischemic stroke
Časové okno: 1, 2 and 5 years
|
Each arterial systemic embolic event considered separately at 1, 2 and 5 years |
1, 2 and 5 years
|
|
Rate of patients with myocardial infraction
Časové okno: 1, 2 and 5 years
|
Each arterial systemic embolic event considered separately at 1, 2 and 5 years |
1, 2 and 5 years
|
|
Rate of patients with peripheral embolism
Časové okno: 1, 2 and 5 years
|
Each arterial systemic embolic event considered separately at 1, 2 and 5 years |
1, 2 and 5 years
|
|
Rate of patients with transient ischemic attack
Časové okno: 1, 2 and 5 years
|
Transient ischemic attack at 1, 2 and 5 years |
1, 2 and 5 years
|
|
Rate of patients with pulmonary embolism
Časové okno: 1, 2 and 5 years
|
Pulmonary embolism at 1, 2 and 5 years |
1, 2 and 5 years
|
|
All-cause mortality
Časové okno: 1, 2 and 5 years
|
All-cause mortality at 1, 2 and 5 year(s) |
1, 2 and 5 years
|
|
LVT size/resolution
Časové okno: 5 years
|
LVT size/resolution at follow-up imaging |
5 years
|
Spolupracovníci a vyšetřovatelé
Sponzor
Sponzor
Vyšetřovatelé
Vyšetřovatelé
- Vrchní vyšetřovatel: Christoph Gräni, Prof. PHD, Department of Cardiology, University Hospital Bern
Termíny studijních záznamů
Hlavní termíny studia
Začátek studia (Aktuální)
Začátek studia
Primární dokončení (Aktuální)
Primární dokončení
Dokončení studie (Aktuální)
Dokončení studie
Termíny zápisu do studia
První předloženo
První předloženo
První předloženo, které splnilo kritéria kontroly kvality
První předloženo, které splnilo kritéria kontroly kvality
První zveřejněno (Aktuální)
První zveřejněno
Aktualizace studijních záznamů
Poslední zveřejněná aktualizace (Aktuální)
Poslední zveřejněná aktualizace
Odeslaná poslední aktualizace, která splnila kritéria kontroly kvality
Odeslaná poslední aktualizace, která splnila kritéria kontroly kvality
Naposledy ověřeno
Naposledy ověřeno
Více informací
Termíny související s touto studií
Klíčová slova
Další identifikační čísla studie
Další identifikační čísla studie
- 2020-02187
Plán pro data jednotlivých účastníků (IPD)
Plánujete sdílet data jednotlivých účastníků (IPD)?
Informace o lécích a zařízeních, studijní dokumenty
Studuje lékový produkt regulovaný americkým FDA
Studuje produkt zařízení regulovaný americkým úřadem FDA
Tyto informace byly beze změn načteny přímo z webu clinicaltrials.gov. Máte-li jakékoli požadavky na změnu, odstranění nebo aktualizaci podrobností studie, kontaktujte prosím register@clinicaltrials.gov. Jakmile bude změna implementována na clinicaltrials.gov, bude automaticky aktualizována i na našem webu .