RESUMEN
AIMS: Patients with atrial fibrillation who despite taking oral anti-coagulant therapy (OAT) suffer a stroke or systemic embolism (SSE) without vascular cause or who develop left atrial appendage (LAA) thrombus (LAAT) should be considered as having malignant LAA. The optimal treatment strategy to reduce SSE risk in such patients is unknown. The aim of the study is to investigate the diagnostic and therapeutic pathways for malignant LAA practiced in European cardiac centres. METHODS AND RESULTS: An 18-item online questionnaire on malignant LAA was disseminated by the European Heart Rhythm Association (EHRA) Scientific Initiatives Committee. A total of 196 physicians participated in the survey. There seems to be high confidence in transoesophageal echocardiography (TEE) imaging, considering LAAT diagnosis. Switching to another direct oral anti-coagulant (DOAC) is the preferred initial step for the treatment of malignant LAA followed by a switch to vitamin K antagonist (VKA), low-molecular-weight heparin, or continued/optimized DOAC dosage, whereas LAA closure is the last option. Left atrial appendage closure is a viable option in patients with embolic stroke despite OAT and no evidence of thrombus at TEE (empty LAA) after comprehensive diagnostic measures to exclude other sources of embolism. CONCLUSION: This EHRA survey provides a snapshot of the contemporary management of patients diagnosed with malignant LAA. Currently, the majority of patients are treated on an outpatient basis with either shifting from VKA to DOAC or from one DOAC to another. Left atrial appendage closure in this population seems to be reserved for patients with higher bleeding risk or complications of malignant LAA, such as stroke.
Asunto(s)
Apéndice Atrial , Fibrilación Atrial , Embolia , Cardiopatías , Accidente Cerebrovascular , Trombosis , Humanos , Apéndice Atrial/diagnóstico por imagen , Fibrilación Atrial/complicaciones , Fibrilación Atrial/diagnóstico , Fibrilación Atrial/tratamiento farmacológico , Accidente Cerebrovascular/prevención & control , Accidente Cerebrovascular/complicaciones , Anticoagulantes/uso terapéutico , Ecocardiografía Transesofágica , Trombosis/epidemiología , Fibrinolíticos/uso terapéutico , Encuestas y Cuestionarios , Resultado del TratamientoRESUMEN
INTRODUCTION: In previous studies the risk of stroke recurrence has been associated with the left atrial appendage (LAA) morphology (non-chicken wing (NCW)), knowing those with a greater risk as malignant LAA. Recently, a simpler morphological classification has been suggested with two categories: Low-risk (LAA-L) and High-risk (LAA-H); which could be easier to apply and may correlate better with the risk of embolic stroke. METHODS: Retrospective analysis from a registry of patients with recurrent cardioembolic strokes despite appropriate anticoagulant therapy, in which LAA morphology was studied with cardiac CT scan. LAA morphology was classified according to the four current categories and H-L morphology by the same cardiologist. Other variables associated with a high risk of stroke were also assessed, such as CHA2DS2-VASc score and left atrial (LA) size. RESULTS: Twenty-six cases were included in the analysis. We identified 22 (84.6%) chicken wing (CW), 1 (3.8%) windsock and 3 (11.5%) cactus by the current classification system, while 15 (57.7%) were classified as LAA-H and 11 (42.3%) as LAA-L by the new system. Half of the 22 cases with CW morphology were considered LAA-H, whereas all NCW were also classified as LAA-H. LA diameter and area were significantly higher in cases with LAA-H morphology (p=0.03 and 0.014), and also in those CW and LAA-H, compared to those CW with LAA-L (p=0.035). CONCLUSIONS: With this new classification system more than half of the cases of our malignant LAAs were classified as high-risk morphology. This morphology was also associated with an increased LA size.
Asunto(s)
Apéndice Atrial/diagnóstico por imagen , Accidente Cerebrovascular Embólico/etiología , Cardiopatías/diagnóstico por imagen , Tomografía Computarizada por Rayos X , Anciano , Anciano de 80 o más Años , Accidente Cerebrovascular Embólico/diagnóstico por imagen , Femenino , Cardiopatías/complicaciones , Humanos , Masculino , Persona de Mediana Edad , Valor Predictivo de las Pruebas , Sistema de Registros , Estudios Retrospectivos , Medición de Riesgo , Factores de Riesgo , Terminología como AsuntoRESUMEN
BACKGROUND AND PURPOSE: There are no recommendations regarding how to treat cardioembolic recurrent strokes when patients are well anticoagulated. We evaluated the safety and efficacy of combining oral anticoagulation (OAC) with percutaneous left atrial appendage closure (LAAC) in patients with well-anticoagulated atrial fibrillation (AF) with recurrent strokes. METHODS: In an explorative, prospective, observational study, LAAC was performed in patients with AF with at least two ischaemic strokes in the previous year, despite good anticoagulation using the Amplatzer Cardiac Plug (St Jude Medical, St Paul, MN, USA) or Amulet Abbot device (Abbot Vascular, Santa Clara, CA, USA). We recorded age, type of AF, CHA2 DS2 -VASC and HAS-BLED scores, types of OAC and risk factors. After closure, treatment with aspirin (100 mg/day) was continued for 3 months in combination with indefinite OAC. Clinical status, recurrent embolisms and bleeding complications were recorded during follow-up. RESULTS: A total of 19 patients were included (mean age, 72.1 ± 9.6 years; mean CHA2 DS2 -VASC score, 5.3 ± 1.48; mean number of previous strokes, 2.78 ± 1.15). Thirteen had spontaneous echocardiographic contrast and all had dilatation of the left atrium. Eighteen patients had a multilobulated left atrial appendage, 17 with 'chicken-wing' morphology and one patient had a left atrial appendage thrombus. There were no complications during the procedure. Only one patient had a transient ischaemic attack and no major bleeding occurred during a mean follow-up of 17.4 ± 11.5 months. CONCLUSION: Combination therapy with indefinite OAC plus LAAC in patients with AF with recurrent strokes despite good anticoagulation should be considered in order to prevent a new stroke.