https://www.ahajournals.org/doi/pdf/10.1161/STR.0000000000000375

2021 Guideline for the Prevention of Stroke in Patients With Stroke and Transient Ischemic Attack: A Guideline From the American Heart Association/American Stroke Association

Left ventricular thrombus (LVT) complicates both ischemic and non-ischemic cardiomyopathies and is a potential cause of thromboembolic complications such as stroke. Management of LVT in the 21st century is primarily based on studies before the widespread use of potent pharmacological and interventional therapies such as primary percutaneous coronary intervention, especially in the setting of acute myocardial infarction. Though advances in diagnostic technology have improved detection of LVT, clinicians face several uncertainties in the management of LVT in daily practice. The aim of this paper is to examine several controversies in the diagnosis and management of LVT. Prospective studies are needed to advance therapy of LVT.

https://journals.sagepub.com/doi/pdf/10.1177/1753944717711139

Challenges in management of left ventricular thrombus.

Aim Current guidelines recommend the use of vitamin K antagonist (VKA) for up to 3-6 months for treatment of left ventricular (LV) thrombus post-acute myocardial infarction (AMI). However, based on evidence supporting non-inferiority of novel oral anticoagulants (NOAC) compared to VKA for other indications such as deep vein thrombosis, pulmonary embolism (PE), and thromboembolic prevention in atrial fibrillation, NOACs are being increasingly used off licence for the treatment of LV thrombus post-AMI. In this study, we investigated the safety and effect of NOACs compared to VKA on LV thrombus resolution in patients presenting with AMI. Methods and results This was an observational study of 2328 consecutive patients undergoing coronary angiography ± percutaneous coronary intervention (PCI) for AMI between May 2015 and December 2018, at a UK cardiac centre. Patients' details were collected from the hospital electronic database. The primary endpoint was rate of LV thrombus resolution with bleeding rates a secondary outcome. Left ventricular thrombus was diagnosed in 101 (4.3%) patients. Sixty patients (59.4%) were started on VKA and 41 patients (40.6%) on NOAC therapy (rivaroxaban: 58.5%, apixaban: 36.5%, and edoxaban: 5.0%). Both groups were well matched in terms of baseline characteristics including age, previous cardiac history (previous myocardial infarction, PCI, coronary artery bypass grafting), and cardiovascular risk factors (hypertension, diabetes, hypercholesterolaemia). Over the follow-up period (median 2.2 years), overall rates of LV thrombus resolution were 86.1%. There was greater and earlier LV thrombus resolution in the NOAC group compared to patients treated with warfarin (82% vs. 64.4%, P = 0.0018, at 1 year), which persisted after adjusting for baseline variables (odds ratio 1.8, 95% confidence interval 1.2-2.9). Major bleeding events during the follow-up period were lower in the NOAC group, compared with VKA group (0% vs. 6.7%, P = 0.030) with no difference in rates of systemic thromboembolism (5% vs. 2.4%, P = 0.388). Conclusion These data suggest improved thrombus resolution in post-acute coronary syndrome (ACS) LV thrombosis in patients treated with NOACs compared to VKAs. This improvement in thrombus resolution was accompanied with a better safety profile for NOAC patients vs. VKA-treated patients. Thus, provides data to support a randomized trial to answer this question.

/pdf/the-use-of-novel-oral-anticoagulants-compared-to-vitamin-k-4n8vnvfico.pdf

The use of novel oral anticoagulants compared to vitamin K antagonists (warfarin) in patients with left ventricular thrombus after acute myocardial infarction.

The efficacy of direct oral anticoagulants (DOACs) in the management of left ventricular (LV) thrombi remains to be determined, especially in patients with ischemic cardiomyopathy. This retrospective study sought to compare the efficacy of vitamin K antagonists (VKAs) and DOACs in patients with LV thrombi and evaluate the rate of LV thrombus resolution after adjusting anticoagulation. This observational retrospective study included patients admitted to our institution for LV thrombus between January 2010 and August 2019. The rate of LV thrombus resolution was compared between VKAs and DOACs. Patients without thrombus resolution with DOAC treatment were switched to VKA agents in order to obtain an international normalized ratio (INR) of 3–4. Between January 2010 and August 2019, 59 consecutive patients with LV thrombi detected by transthoracic echocardiography were included in the study. The mean age was 62 ± 14 years and 16.9% were women. The circumstances of LV thrombus discovery were as follows: acute myocardial infarction or ischemic myocardiopathy (n = 22), stroke (n = 6), chest pain (n = 7), heart failure (n = 11), transthoracic echocardiographic evaluation (n = 11), and ventricular arrhythmias (n = 2). The proportion of patients on DOACs was 28.8% (n = 17), while that of those on VKAs was 71.2% (n = 42). Thrombus resolution was obtained in 70.6% (12/17) of patients on DOACs and in 71.4% (30/42) of those on VKAs (p = 0.9). Patients who failed to respond to DOAC treatment were treated with VKAs, and following this treatment adjustment all LV thrombi were dissolved in the DOAC group (5/5). Five embolic events (8.4% of stroke) occurred before the treatment initiation and six with anticoagulants (2/17 with DOACs [11.8%] and 4/42 with VKAs [9.5%]; p = 0.8). This retrospective observational study found a similar efficacy between DOAC and VKA agents in patients with LV thrombi (70.6% vs. 71.5%); however, when the thrombus remains, VKAs are still the standard of care as it is possible to control INR levels (3–4) with them.

Management of Left Ventricular Thrombi with Direct Oral Anticoagulants: Retrospective Comparative Study with Vitamin K Antagonists

Left ventricular thrombus (LVT) can be a consequence of cardiac diseases such as heart failure with reduced ejection fraction and acute myocardial infarction. Currently, the guidelines recommend the use of warfarin for the treatment of this condition. However, there are increasing reports of patients with LVTs being treated with direct oral anticoagulants (DOACs), for several reasons. We set out to review the available literature to assess the safety and the efficacy of this approach. We analyzed 52 cases, extrapolated by 34 papers contained in literature, focusing on the characteristics of patients, treatment, outcome, and follow-up. Rivaroxaban was the most commonly used DOAC, followed by apixaban. The diagnosis of LVT and the follow-up were mainly performed by transthoracic echocardiography. The thrombus resolved in 45 patients (92%) of 49 (there are no data available regarding the outcome of 3 patients) and failed to resolve in 4 patients treated with DOACs. The resolution occurred in a median of 32 days. DOACs are shown to be a reasonable and valid option for the treatment of LVT. Our study provides a rationale for a prospective randomized controlled trial.

Direct Oral Anticoagulants for the Treatment of Left Ventricular Thrombus-A New Indication? A Meta-summary of Case Reports.

Left ventricular thrombus (LVT) after acute myocardial infarction (AMI) is a risk factor for embolic complications. Although warfarin has traditionally been used to treat LVT, it has relevant disadvantages that limit its use. We herein describe the case of a 78-year-old man with AMI who had a history of paroxysmal atrial fibrillation. Following 10 days of urgent coronary reperfusion therapy, transthoracic echocardiography revealed a moderately sized LVT in the apex, which subsequently disappeared after 18 days of treatment with dabigatran. This case demonstrates that dabigatran may represent an alternative to warfarin as a therapeutic option in patients with LVT after AMI.

Effects of Dabigatran on the Resolution of Left Ventricular Thrombus after Acute Myocardial Infarction.

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Effects of Dabigatran on the Resolution of Left Ventricular Thrombus after Acute Myocardial Infarction.