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Chousou PA, Chattopadhyay RK, Matthews G, Clark A, Vassiliou VS, Pugh PJ. The incidence of atrial fibrillation detected by implantable loop recorders: a comparison between patients with and without embolic stroke of undetermined source. EUROPEAN HEART JOURNAL OPEN 2024; 4:oeae061. [PMID: 39219854 PMCID: PMC11366165 DOI: 10.1093/ehjopen/oeae061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/03/2024] [Revised: 06/12/2024] [Accepted: 07/19/2024] [Indexed: 09/04/2024]
Abstract
Aims Stroke is the most debilitating outcome of atrial fibrillation (AF). The use of implantable loop recorders increases the detection of AF episodes among patients with embolic stroke of undetermined source. The significance of device-detected AF, or subclinical AF, is unknown. This study aimed to compare the incidence of AF detected by implantable loop recorder in patients with and without embolic stroke of undetermined source. Methods and results We retrospectively studied all patients without known AF who were referred to our institution for implantable loop recorder implantation following embolic stroke of undetermined source, syncope, or palpitations from March 2009 to November 2019. The primary endpoint was any detection of AF or atrial flutter by implantable loop recorder. Seven hundred and fifty patients were included and followed up for a mean duration of 731 days (SD 443). An implantable loop recorder was implanted following embolic stroke of undetermined source in 323 and for assessment of syncope, palpitations, or another reason in 427 patients. The incidence of AF was significantly (P < 0.001) higher among patients with embolic stroke of undetermined source compared with the non-embolic stroke of undetermined source group; 48.6% vs. 13.8% (for any duration of AF) and 32.2% vs. 12.4% (for AF lasting ≥30 s) both P < 0.001. Kaplan-Meier analysis showed significantly higher incidence of AF for incremental durations of AF up to >5.5 h, but not >24 h. This was driven by longest AF durations of <6 min and between 5.5 h and 24 h, suggesting a bimodal distribution. In a multivariable Cox regression analysis, embolic stroke of undetermined source independently conferred an almost 5-fold increase in the hazard for any duration of AF. Conclusion The incidence of AF is significantly higher amongst embolic stroke of undetermined source vs. non-embolic stroke of undetermined source patients monitored constantly by an implantable loop recorder. A high number of embolic stroke of undetermined source survivors have short-duration AF episodes. Further work is needed to determine the optimal treatment strategy of these AF episodes in embolic stroke of undetermined source.
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Affiliation(s)
- Panagiota A Chousou
- Norwich Medical School, University of East Anglia, Norwich, Norfolk NR4 7TJ, UK
- Department of Cardiology, Addenbrooke’s Hospital, Cambridge University Hospitals NHS Foundation Trust, Hill's Road, Cambridge CB2 0QQ, UK
| | - Rahul K Chattopadhyay
- Norwich Medical School, University of East Anglia, Norwich, Norfolk NR4 7TJ, UK
- Department of Cardiology, Addenbrooke’s Hospital, Cambridge University Hospitals NHS Foundation Trust, Hill's Road, Cambridge CB2 0QQ, UK
| | - Gareth Matthews
- Norwich Medical School, University of East Anglia, Norwich, Norfolk NR4 7TJ, UK
- Department of Cardiology, Norfolk and Norwich University Hospitals NHS Foundation Trust, Norwich, UK
| | - Allan Clark
- Norwich Medical School, University of East Anglia, Norwich, Norfolk NR4 7TJ, UK
| | - Vassilios S Vassiliou
- Norwich Medical School, University of East Anglia, Norwich, Norfolk NR4 7TJ, UK
- Department of Cardiology, Norfolk and Norwich University Hospitals NHS Foundation Trust, Norwich, UK
| | - Peter J Pugh
- Norwich Medical School, University of East Anglia, Norwich, Norfolk NR4 7TJ, UK
- Department of Cardiology, Addenbrooke’s Hospital, Cambridge University Hospitals NHS Foundation Trust, Hill's Road, Cambridge CB2 0QQ, UK
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Gomes RAF, Sá MPBDO, Montenegro MV, Furtado LCC, da Costa JHCF, Coutinho DB, Silva JHV, Sobral Filho DC. Is Stroke risk analysis (SRA) a reliable method for predicting atrial fibrillation? A systematic review. PLoS One 2024; 19:e0305339. [PMID: 38917112 PMCID: PMC11198814 DOI: 10.1371/journal.pone.0305339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2024] [Accepted: 05/28/2024] [Indexed: 06/27/2024] Open
Abstract
INTRODUCTION Atrial fibrillation is responsible for a considerable number of cases of cardioembolism, accounting for 17% to 30% of the etiologies of all strokes. The software known as Stroke Risk Analysis (SRA) detects patients at high risk of paroxysmal atrial fibrillation by analyzing a continuous electrocardiogram recorded over different periods of time. OBJECTIVES This article aims to carry out a systematic review investigating the effectiveness of the SRA method in predicting the risk of stroke patients having paroxysmal atrial fibrillation as the cause of the event. METHODS The methods correspond to the format of the International Prospective Register of Systematic Reviews Protocol, according to CRD Identification Code: CRD42021253974. A systematic search was carried out in BMJB, PubMed/MEDLINE, Science Direct and LILACS. Six cohort studies met the inclusion criteria, representing a total of 2,088 participants with stroke, and compared the detection of patients with paroxysmal atrial fibrillation on the continuous recording electrocardiogram with a time variation of 1 to 48h with the use of SRA. RESULTS Studies have shown that SRA has a high negative predictive value (between 96 and 99.1%) and can contribute to the selection of patients at high risk of paroxysmal atrial fibrillation to be referred for implantable cardiac monitoring to continue the investigation. CONCLUSIONS A sequential combination of SRA with implantable cardiac monitoring is a promising strategy for detecting undiagnosed paroxysmal atrial fibrillation. Thus, the SRA can act as a cost-effective pre-selection tool to identify patients at higher risk of having paroxysmal atrial fibrillation as a possible cause of stroke and who may benefit from implantable cardiac monitoring. However, the lack of randomized studies is a limitation that must be considered.
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Cannizzaro F, Izquierdo A, Cocho D. Rate of atrial fibrillation by Holter-Stroke Risk Analysis in undetermined TIA/rapidly improving stroke symptoms patients. Front Neurol 2024; 15:1353812. [PMID: 38742045 PMCID: PMC11089105 DOI: 10.3389/fneur.2024.1353812] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Accepted: 04/02/2024] [Indexed: 05/16/2024] Open
Abstract
Introduction Holter-SRA (Stroke Risk Analysis) is an automated analysis of ECG monitoring for Atrial Fibrillation (AF) detection. The aim of this study was to evaluate the rate of AF in undetermined TIA/Rapidly improving stroke symptoms (RISS) patients. Methods Prospective study of undetermined TIA/RISS patients who presented to the emergency department. Early vascular studies (angio CT, transthoracic echocardiography and ECG) were performed in emergency department. The Holter-SRA device was placed for 2 h and the patients were classified into: confirmed AF, high risk of AF or low risk of AF. Prolonged ambulatory monitoring (7 days) was carried out every month for patients with a high-risk pattern. The results were evaluated until definitive detection of AF or low-risk pattern. The endpoints were rate of AF and vascular recurrence at 90 days. Results Over a period of 24 months, 83 undetermined TIA/RISS patients were enrolled. The mean age was 70 ± 10 years and 61% were men. The median ABCD2 score was 4 points (1-7). After 2 h of monitoring in the emergency department, AF was detected in one patient (1.2%), 51 patients with a low-risk pattern and 31 patients (37.3%) showed a high-risk pattern of AF. During the ambulatory monitoring, of the 31 patients high risk pattern patients, AF was diagnosed to 17 cases and of the 51 patients with a low-risk pattern, one case experienced a recurrent vascular due to undetected AF (1.9% false negative). Three patients (3.6%) suffered a vascular recurrence within the first 90 days, before AF diagnosis. Conclusions In our study, AF was detected in 22.9% of the 83 patients with indeterminate TIA/RISS. Holter-SRA has allowed us to increase the detection of AF, especially those patients with a high-risk pattern in the first 3 months.
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Affiliation(s)
- F Cannizzaro
- Family Medicine Department, Hospital General de Granollers, Barcelona, Spain
| | - A Izquierdo
- Neurology Department, Hospital General de Granollers, Barcelona, Spain
| | - D Cocho
- Neurology Department, Hospital General de Granollers, Barcelona, Spain
- Faculty of Medicine and Health Sciences, Department of Medicine, Universitat Internacional de Catalunya, Barcelona, Spain
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Kawamura Y, Vafaei Sadr A, Abedi V, Zand R. Many Models, Little Adoption-What Accounts for Low Uptake of Machine Learning Models for Atrial Fibrillation Prediction and Detection? J Clin Med 2024; 13:1313. [PMID: 38592138 PMCID: PMC10932407 DOI: 10.3390/jcm13051313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Revised: 02/19/2024] [Accepted: 02/23/2024] [Indexed: 04/10/2024] Open
Abstract
(1) Background: Atrial fibrillation (AF) is a major risk factor for stroke and is often underdiagnosed, despite being present in 13-26% of ischemic stroke patients. Recently, a significant number of machine learning (ML)-based models have been proposed for AF prediction and detection for primary and secondary stroke prevention. However, clinical translation of these technological innovations to close the AF care gap has been scant. Herein, we sought to systematically examine studies, employing ML models to predict incident AF in a population without prior AF or to detect paroxysmal AF in stroke cohorts to identify key reasons for the lack of translation into the clinical workflow. We conclude with a set of recommendations to improve the clinical translatability of ML-based models for AF. (2) Methods: MEDLINE, Embase, Web of Science, Clinicaltrials.gov, and ICTRP databases were searched for relevant articles from the inception of the databases up to September 2022 to identify peer-reviewed articles in English that used ML methods to predict incident AF or detect AF after stroke and reported adequate performance metrics. The search yielded 2815 articles, of which 16 studies using ML models to predict incident AF and three studies focusing on ML models to detect AF post-stroke were included. (3) Conclusions: This study highlights that (1) many models utilized only a limited subset of variables available from patients' health records; (2) only 37% of models were externally validated, and stratified analysis was often lacking; (3) 0% of models and 53% of datasets were explicitly made available, limiting reproducibility and transparency; and (4) data pre-processing did not include bias mitigation and sufficient details, leading to potential selection bias. Low generalizability, high false alarm rate, and lack of interpretability were identified as additional factors to be addressed before ML models can be widely deployed in the clinical care setting. Given these limitations, our recommendations to improve the uptake of ML models for better AF outcomes include improving generalizability, reducing potential systemic biases, and investing in external validation studies whilst developing a transparent modeling pipeline to ensure reproducibility.
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Affiliation(s)
- Yuki Kawamura
- School of Clinical Medicine, University of Cambridge, Cambridge CB3 0SP, UK
| | - Alireza Vafaei Sadr
- Department of Public Health Sciences, College of Medicine, The Pennsylvania State University, Hershey, PA 17033, USA (V.A.)
| | - Vida Abedi
- Department of Public Health Sciences, College of Medicine, The Pennsylvania State University, Hershey, PA 17033, USA (V.A.)
| | - Ramin Zand
- Department of Neurology, College of Medicine, The Pennsylvania State University, Hershey, PA 17033, USA
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Höwel D, Leitz P, Frommeyer G, Ritter MA, Reinke F, Füting A, Reinsch N, Eckardt L, Kochhäuser S, Dechering DG. Predictors of Atrial Fibrillation in Patients with Embolic Stroke of Unknown Etiology and Implantable Loop Recorders-Further Insights of the TRACK AF Study on the Role of ECG and Echocardiography. J Clin Med 2023; 12:6566. [PMID: 37892704 PMCID: PMC10607500 DOI: 10.3390/jcm12206566] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2023] [Revised: 09/26/2023] [Accepted: 10/13/2023] [Indexed: 10/29/2023] Open
Abstract
Aims-Electrocardiography (ECG) and echocardiographic left atrial (LA) parameters may be helpful to assess the risk of atrial fibrillation (AF) in embolic stroke of unknown etiology (ESUS) and could therefore guide intensity of ECG monitoring. Methods-1153 consecutive patients with ischemic stroke or transient ischemic attack (TIA) were analyzed. An internal loop recorder (ILR) was implanted in 104 consecutive patients with ESUS. Multiple morphologic P-wave parameters in baseline 12-channel ECG and echocardiographic LA parameters were measured and analyzed in patients with and without ILR-detected AF. Using logistic regression, we evaluated the predictive value of several ECG parameters and LA dimensions on the occurrence of AF. Results-In 20 of 104 (19%) patients, AF was diagnosed by ILR during a mean monitoring time of 575 (IQR 470-580) days. Patients with AF were significantly older (72 (67-75) vs. 60 (52-72) years; p = 0.001) and premature atrial contractions (PAC) were more frequently observed (40% vs. 2%; p < 0.001) during baseline ECG. All morphologic P-wave parameters did not show a significant difference between groups. There was a non-significant trend towards a larger LA volume index (31 (24-36) vs. 29 (25-37) mL/m2; p = 0.09) in AF patients. Conclusions-Age and PAC are independently associated with incident AF in ESUS and could be used as markers for selecting patients that may benefit from more extensive rhythm monitoring or ILR implantation. In our consecutive cohort of patients with ESUS, neither morphological P-wave parameters nor LA size were predictive of AF.
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Affiliation(s)
- Dennis Höwel
- Department of Cardiology, St. Marienhospital Vechta, Marienstr. 6-8, 49377 Vechta, Germany
- Department of Cardiology II—Electrophysiology, University Hospital Münster, 48149 Münster, Germany
| | - Patrick Leitz
- Department of Cardiology II—Electrophysiology, University Hospital Münster, 48149 Münster, Germany
| | - Gerrit Frommeyer
- Department of Cardiology II—Electrophysiology, University Hospital Münster, 48149 Münster, Germany
| | - Martin A. Ritter
- Department of Neurology, University Hospital Münster, 48149 Münster, Germany
| | - Florian Reinke
- Department of Cardiology II—Electrophysiology, University Hospital Münster, 48149 Münster, Germany
| | - Anna Füting
- Department of Medicine, Witten/Herdecke University, 58455 Witten, Germany
| | - Nico Reinsch
- Department of Medicine, Witten/Herdecke University, 58455 Witten, Germany
| | - Lars Eckardt
- Department of Cardiology II—Electrophysiology, University Hospital Münster, 48149 Münster, Germany
| | - Simon Kochhäuser
- Department of Cardiology II—Electrophysiology, University Hospital Münster, 48149 Münster, Germany
- Department of Internal Medicine/Cardiology, Marienhospital Osnabrück, 49074 Osnabrück, Germany
| | - Dirk G. Dechering
- Department of Cardiology II—Electrophysiology, University Hospital Münster, 48149 Münster, Germany
- Department of Internal Medicine/Cardiology, Marienhospital Osnabrück, 49074 Osnabrück, Germany
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van Kempen J, Glatz C, Wolfes J, Frommeyer G, Boentert M. Detecting atrial fibrillation in the polysomnography-derived electrocardiogram: a software validation study. Sleep Breath 2023; 27:1753-1757. [PMID: 36680625 PMCID: PMC10539451 DOI: 10.1007/s11325-023-02779-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Revised: 11/17/2022] [Accepted: 01/10/2023] [Indexed: 01/22/2023]
Abstract
PURPOSE The present study validated a software-based electrocardiogram (ECG) analysis tool for detection of atrial fibrillation (AF) and risk for AF using polysomnography (PSG)-derived ECG recordings. METHODS The Stroke Risk Analysis® (SRA®) software was applied to 3-channel ECG tracings from diagnostic PSG performed in enrolled subjects including a subgroup of subjects with previously documented AF. No subjects used positive airway pressure therapy. All ECG recordings were visually analyzed by a blinded cardiologist. RESULTS Of subjects enrolled in the study, 93 had previously documented AF and 178 of 186 had an ECG that could be analyzed by either method. In subjects with known history of AF, automated analysis using SRA® classified 47 out of 87 ECG as either manifest AF or showing increased risk for paroxysmal AF (PAF) by SRA® (sensitivity 0.54, specificity 0.86). On visual analysis, 36/87 ECG showed manifest AF and 51/87 showed sinus rhythm. Among the latter subgroup, an increased risk for PAF was ascribed by SRA® in 11 cases (sensitivity 0.22, specificity 0.78) and by expert visual analysis in 5 cases (sensitivity 0.1, specificity 0.90). Among 36/178 ECG with manifest AF on visual analysis, 33 were correctly identified by the SRA® software (sensitivity and specificity 0.92). CONCLUSION Sleep studies provide a valuable source of ECG recordings that can be easily subjected to software-based analysis in order to identify manifest AF and automatically assess the risk of PAF. For optimal evaluability of data, multiple channel ECG tracings are desirable. For assessment of PAF risk, the SRA® analysis probably excels visual analysis, but sensitivity of both methods is low, reflecting that repeated ECG recording remains essential.
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Affiliation(s)
- Julia van Kempen
- Department of Neurology with Institute of Translational Neurology, Münster University Hospital (UKM), Münster, Germany
| | - Christian Glatz
- Department of Neurology with Institute of Translational Neurology, Münster University Hospital (UKM), Münster, Germany
| | - Julian Wolfes
- Department of Cardiology II - Electrophysiology, Münster University Hospital (UKM), Münster, Germany
| | - Gerrit Frommeyer
- Department of Cardiology II - Electrophysiology, Münster University Hospital (UKM), Münster, Germany
| | - Matthias Boentert
- Department of Neurology with Institute of Translational Neurology, Münster University Hospital (UKM), Münster, Germany.
- Department of Medicine, UKM Marienhospital Steinfurt, Steinfurt, Germany.
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Del Buono MG, Sanna T. Atrial fibrillation: focus on monitoring strategies after cryptogenic stroke. Minerva Cardiol Angiol 2022; 70:606-615. [PMID: 35080356 DOI: 10.23736/s2724-5683.21.05851-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Atrial fibrillation (AF) is responsible for up to one-third of ischemic strokes, with stroke potentially being the first manifestation of a previously undetected AF. Given the efficacy of oral anticoagulants in preventing AF-related ischemic events, searching for unknown AF after stroke requires a comprehensive diagnostic workup. Prospective data have demonstrated the benefits of long-term cardiac monitoring to identify AF in association with cryptogenic stroke, as most strokes are presumed to result from AF. However, strategies of empirical anticoagulation using oral anticoagulants following cryptogenic stroke failed to improve outcomes. We herein summarize contemporary evidence and knowledge gaps on searching for AF after a stroke and the potential secondary prevention strategies to prevent further recurrences.
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Affiliation(s)
| | - Tommaso Sanna
- Sacred Heart Catholic University, Rome, Italy -
- IRCCS A. Gemelli University Polyclinic Foundation, Rome, Italy
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Bhat A, Mahajan V, Chen HHL, Gan GCH, Pontes-Neto OM, Tan TC. Embolic Stroke of Undetermined Source: Approaches in Risk Stratification for Cardioembolism. Stroke 2021; 52:e820-e836. [PMID: 34706562 DOI: 10.1161/strokeaha.121.034498] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Ischemic stroke is a leading cause of morbidity and mortality worldwide. Embolic stroke of undetermined source has been recently proposed to categorize nonlacunar ischemic strokes without confirmed etiology after adequate investigation with a likely embolic stroke mechanism. A strategy of empirical anticoagulation for embolic stroke of undetermined source patients is attractive but may only be beneficial in a select subset of patients. Strategies which would help identify the subset of embolic stroke of undetermined source patients most likely to have cardioembolic origin of stroke, and hence benefit from anticoagulation, are needed. This article will review current evidence which may be useful in the development of a risk stratification approach based on arrhythmia monitoring, cardiac imaging, and clinical risk stratification. This approach may be beneficial in clinical practice in improving patient outcomes and reducing stroke recurrence in this population; however, further work is required with active trials underway.
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Affiliation(s)
- Aditya Bhat
- Department of Cardiology, Blacktown Hospital, Sydney, Australia (A.B., V.M., H.H.L.C., G.C.H.G., T.C.T.).,School of Public Health and Community Medicine (A.B., T.C.T.), University of New South Wales, Sydney, Australia.,School of Medicine, Western Sydney University, Australia (A.B., G.C.H.G., T.C.T.)
| | - Vipul Mahajan
- Department of Cardiology, Blacktown Hospital, Sydney, Australia (A.B., V.M., H.H.L.C., G.C.H.G., T.C.T.)
| | - Henry H L Chen
- Department of Cardiology, Blacktown Hospital, Sydney, Australia (A.B., V.M., H.H.L.C., G.C.H.G., T.C.T.)
| | - Gary C H Gan
- Department of Cardiology, Blacktown Hospital, Sydney, Australia (A.B., V.M., H.H.L.C., G.C.H.G., T.C.T.).,School of Medicine (G.C.H.G.), University of New South Wales, Sydney, Australia.,School of Medicine, Western Sydney University, Australia (A.B., G.C.H.G., T.C.T.)
| | - Octavio M Pontes-Neto
- Stroke Service, Neurology Division, Department of Neuroscience and Behavior, Ribeirão Preto Medical School, University of São Paulo, Brazil (O.M.P.-N.)
| | - Timothy C Tan
- Department of Cardiology, Blacktown Hospital, Sydney, Australia (A.B., V.M., H.H.L.C., G.C.H.G., T.C.T.).,School of Public Health and Community Medicine (A.B., T.C.T.), University of New South Wales, Sydney, Australia.,School of Medicine, Western Sydney University, Australia (A.B., G.C.H.G., T.C.T.)
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9
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Gröschel S, Lange B, Wasser K, Hahn M, Wachter R, Gröschel K, Uphaus T. Software-based analysis of 1-hour Holter ECG to select for prolonged ECG monitoring after stroke. Ann Clin Transl Neurol 2020; 7:1779-1787. [PMID: 32862499 PMCID: PMC7545589 DOI: 10.1002/acn3.51157] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2020] [Revised: 07/17/2020] [Accepted: 07/18/2020] [Indexed: 11/11/2022] Open
Abstract
Objective Identification of ischemic stroke patients at high risk for paroxysmal atrial fibrillation (pAF) during 72 hours Holter ECG might be useful to individualize the allocation of prolonged ECG monitoring times, currently not routinely applied in clinical practice. Methods In a prospective multicenter study, the first analysable hour of raw ECG data from prolonged 72 hours Holter ECG monitoring in 1031 patients with acute ischemic stroke/TIA presenting in sinus rhythm was classified by an automated software (AA) into “no risk of AF” or “risk of AF” and compared to clinical variables to predict AF during 72 hours Holter‐ECG. Results pAF was diagnosed in 54 patients (5.2%; mean age: 78 years; female 56%) and was more frequently detected after 72 hours in patients classified by AA as “risk of AF” (n = 21, 17.8%) compared to “no risk of AF” (n = 33, 3.6%). AA‐based risk stratification as “risk of AF” remained in the prediction model for pAF detection during 72 hours Holter ECG (OR3.814, 95% CI 2.024‐7.816, P < 0.001), in addition to age (OR1.052, 95% CI 1.021‐1.084, P = 0.001), NIHSS (OR 1.087, 95% CI 1.023‐1.154, P = 0.007) and prior treatment with thrombolysis (OR2.639, 95% CI 1.313‐5.306, P = 0.006). Similarly, risk stratification by AA significantly increased the area under the receiver operating characteristic curve (AUC) for prediction of pAF detection compared to a purely clinical risk score (AS5F alone: AUC 0.751; 95% CI 0.724‐0.778; AUC for the combination: 0.789, 95% CI 0.763‐0.814; difference between the AUC P = 0.022). Interpretation Automated software‐based ECG risk stratification selects patients with high risk of AF during 72 hours Holter ECG and adds predictive value to common clinical risk factors for AF prediction.
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Affiliation(s)
- Sonja Gröschel
- Department of Neurology, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Björn Lange
- Department of Cardiology II, University Medical Center of the Johannes Gutenberg University, Mainz, Germany
| | - Katrin Wasser
- Department of Neurology, University Medicine Göttingen, Göttingen, Germany
| | - Marianne Hahn
- Department of Neurology, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Rolf Wachter
- Clinic and Policlinic for Cardiology, University Hospital Leipzig, Leipzig, Germany.,Clinic for Cardiology and Pneumology, University Medicine Göttingen, Göttingen, Germany.,German Cardiovascular Research Center (DZHK), partner site Göttingen, Göttingen, Germany
| | - Klaus Gröschel
- Department of Neurology, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Timo Uphaus
- Department of Neurology, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
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Muria-Subirats E, Clua-Espuny JL, Ballesta-Ors J, Lorman-Carbo B, Lechuga-Duran I, Fernández-Saez J, Pla-Farnos R. Incidence and Risk Assessment for Atrial Fibrillation at 5 Years: Hypertensive Diabetic Retrospective Cohort. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:E3491. [PMID: 32429492 PMCID: PMC7277633 DOI: 10.3390/ijerph17103491] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/11/2020] [Revised: 05/06/2020] [Accepted: 05/14/2020] [Indexed: 01/14/2023]
Abstract
(1) Background: The link between diabetes and hypertension is mutual and reciprocal, increasing the risks for the development of atrial fibrillation (AF). The main objective was to develop a prediction model for AF in a population with both diabetes and hypertension at five years of follow-up. (2) Methods: A multicenter and community-based cohort study was undertaken of 8237 hypertensive diabetic patients without AF between 1 January 2103 and 31 December 2017. Multivariate Cox proportional-hazards regression models were used to identify predictors AF and to stratify risk scores by quartiles. (3) Results: AF incidence was 10.5/1000 people/years (95% confidence interval (CI) 9.5-11.5), higher in men. The independent prognostic factors identified: age (hazard ratio (HR) 1.07 95% CI 1.05-1.09, p < 0.001), weight (HR 1.03 95% CI 1.02-1.04, p < 0.001), CHA2DS2VASc score (HR 1.57 95% CI 1.16-2.13, p = 0.003) and female gender (HR 0.55 95% CI 0.37-0.82, p = 0.004). Q4 (highest-risk group for AF) had the highest AF incidence, stroke and mortality, and the smallest number needed to screen to detect one case of AF. (4) Conclusions: Risk-based screening for AF should be used in high cardiovascular risk patients as the hypertensive diabetics, for treatment of modifiable cardiovascular risk, and monitoring AF detection.
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Affiliation(s)
- Eulalia Muria-Subirats
- Department of Primary Care, Catalonian Health Institute, Institute for Research in Primary Health Care Jordi Gol i Gurina (IDIAPJGol) Rovira i Virgili University, 43500 Tortosa, Spain;
| | - Josep Lluis Clua-Espuny
- Department of Primary Care, Catalonian Health Institute, Institute for Research in Primary Health Care Jordi Gol i Gurina (IDIAPJGol) Rovira i Virgili University, 43500 Tortosa, Spain;
| | - Juan Ballesta-Ors
- Department of Primary Care, UUDD Terres de l’Ebre-Tortosa, Catalonian Health Institute, 43500 Tortosa, Spain; (J.B.-O.); (B.L.-C.)
| | - Blanca Lorman-Carbo
- Department of Primary Care, UUDD Terres de l’Ebre-Tortosa, Catalonian Health Institute, 43500 Tortosa, Spain; (J.B.-O.); (B.L.-C.)
| | - Iñigo Lechuga-Duran
- Department of Cardiology, Catalonian Health Institute, Hospital Verge de la Cinta, Institut de Recerca Sanitària Pere Virgili (IISPV), 43500 Tortosa, Spain;
| | - Jose Fernández-Saez
- Unitat de Suport a la Recerca Terres de l’Ebre, Fundació Institut Universitari per a la recerca a l’Atenció Primària de Salut Jordi Gol i Gurina (IDIAPJGol), 43500 Tortosa, Spain;
- Unidat de Recerca, Gerència Territorial Terres de l´Ebre, Institut Catalá de la Salut, 43500 Tortosa, Spain
- Facultat de Enfermería, Campus Terres de l´Ebre, Universitat Rovira i Virgili, 43500 Tortosa, Spain
| | - Roger Pla-Farnos
- Primary Care Research Group, Department of Medicine and Surgery, Rovira I Virgili University, 43003 Tarragona, Spain;
| | - on behalf members of AFRICAT Group
- AFRICAT Research Group, Institute for Research in Primary Health Care Jordi Gol i Gurina (IDIAPJGol), Gran Via de les Corts Catalanes, 587, 08007 Barcelona, Spain
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11
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Gröschel S, Lange B, Grond M, Jauss M, Kirchhof P, Rostock T, Wachter R, Gröschel K, Uphaus T. Automatic Holter electrocardiogram analysis in ischaemic stroke patients to detect paroxysmal atrial fibrillation: ready to replace physicians? Eur J Neurol 2020; 27:1272-1278. [DOI: 10.1111/ene.14250] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Revised: 04/01/2020] [Accepted: 04/01/2020] [Indexed: 02/06/2023]
Affiliation(s)
- S. Gröschel
- Department of Neurology University Medical Center of the Johannes Gutenberg University Mainz Mainz Germany
| | - B. Lange
- Department of Cardiology II University Medical Center of the Johannes Gutenberg University Mainz Mainz Germany
| | - M. Grond
- Department of Neurology Kreisklinikum Siegen Siegen Germany
| | - M. Jauss
- Department of Neurology Hainich Klinikum Mühlhausen Germany
| | - P. Kirchhof
- Institute of Cardiovascular Sciences University of Birmingham Birmingham UK
- Department of Cardiology SWBH and UHB NHS Trusts Birmingham UK
| | - T. Rostock
- Department of Cardiology II University Medical Center of the Johannes Gutenberg University Mainz Mainz Germany
| | - R. Wachter
- Clinic and Policlinic for Cardiology University Hospital Leipzig Leipzig Germany
- Clinic for Cardiology and Pneumology University Medicine Göttingen Göttingen Germany
- German Cardiovascular Research Center (DZHK), Partner Site Göttingen Göttingen Germany
| | - K. Gröschel
- Department of Neurology University Medical Center of the Johannes Gutenberg University Mainz Mainz Germany
| | - T. Uphaus
- Department of Neurology University Medical Center of the Johannes Gutenberg University Mainz Mainz Germany
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12
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Edwards SJ, Wakefield V, Jhita T, Kew K, Cain P, Marceniuk G. Implantable cardiac monitors to detect atrial fibrillation after cryptogenic stroke: a systematic review and economic evaluation. Health Technol Assess 2020; 24:1-184. [PMID: 31944175 PMCID: PMC6983910 DOI: 10.3310/hta24050] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
BACKGROUND Cryptogenic stroke is a stroke for which no cause is identified after standard diagnostic tests. Long-term implantable cardiac monitors may be better at diagnosing atrial fibrillation and provide an opportunity to reduce the risk of stroke recurrence with anticoagulants. OBJECTIVES The objectives were to assess the diagnostic test accuracy, clinical effectiveness and cost-effectiveness of three implantable monitors [BioMonitor 2-AF™ (Biotronik SE & Co. KG, Berlin, Germany), Confirm Rx™ (Abbott Laboratories, Lake Bluff, IL, USA) and Reveal LINQ™ (Medtronic plc, Minneapolis, MN, USA)] in patients who have had a cryptogenic stroke and for whom no atrial fibrillation is detected after 24 hours of external electrocardiographic monitoring. DATA SOURCES MEDLINE, EMBASE, The Cochrane Library, Database of Abstracts of Reviews of Effects and Health Technology Assessment databases were searched from inception until September 2018. REVIEW METHODS A systematic review was undertaken. Two reviewers agreed on studies for inclusion and performed quality assessment using the Cochrane Risk of Bias 2.0 tool. Results were discussed narratively because there were insufficient data for synthesis. A two-stage de novo economic model was developed: (1) a short-term patient flow model to identify cryptogenic stroke patients who have had atrial fibrillation detected and been prescribed anticoagulation treatment (rather than remaining on antiplatelet treatment) and (2) a long-term Markov model that captured the lifetime costs and benefits of patients on either anticoagulation or antiplatelet treatment. RESULTS One randomised controlled trial, Cryptogenic Stroke and underlying Atrial Fibrillation (CRYSTAL-AF) (Sanna T, Diener HC, Passman RS, Di Lazzaro V, Bernstein RA, Morillo CA, et al. Cryptogenic stroke and underlying atrial fibrillation. N Engl J Med 2014;370:2478-86), was identified, and no diagnostic test accuracy study was identified. The CRYSTAL-AF trial compared the Reveal™ XT (a Reveal LINQ predecessor) (Medtronic plc) monitor with standard of care monitoring. Twenty-six single-arm observational studies for the Reveal devices were also identified. The only data for BioMonitor 2-AF or Confirm Rx were from mixed population studies supplied by the companies. Atrial fibrillation detection in the CRYSTAL-AF trial was higher with the Reveal XT than with standard monitoring at all time points. By 36 months, atrial fibrillation was detected in 19% of patients with an implantable cardiac monitor and in 2.3% of patients receiving conventional follow-up. The 26 observational studies demonstrated that, even in a cryptogenic stroke population, atrial fibrillation detection rates are highly variable and most cases are asymptomatic; therefore, they probably would not have been picked up without an implantable cardiac monitor. Device-related adverse events, such as pain and infection, were low in all studies. The de novo economic model produced incremental cost effectiveness ratios comparing implantable cardiac monitors with standard of care monitoring to detect atrial fibrillation in cryptogenic stroke patients based on data for the Reveal XT device, which can be related to Reveal LINQ. The BioMonitor 2-AF and Confirm RX were included in the analysis by making a strong assumption of equivalence with Reveal LINQ. The results indicate that implantable cardiac monitors could be considered cost-effective at a £20,000-30,000 threshold. When each device is compared incrementally, BioMonitor 2-AF dominates Reveal LINQ and Confirm RX. LIMITATIONS The cost-effectiveness analysis for implantable cardiac monitors is based on a strong assumption of clinical equivalence and should be interpreted with caution. CONCLUSIONS All three implantable cardiac monitors could be considered cost-effective at a £20,000-30,000 threshold, compared with standard of care monitoring, for cryptogenic stroke patients with no atrial fibrillation detected after 24 hours of external electrocardiographic monitoring; however, further clinical studies are required to confirm their efficacy in cryptogenic stroke patients. STUDY REGISTRATION This study is registered as PROSPERO CRD42018109216. FUNDING This project was funded by the National Institute for Health Research (NIHR) Health Technology Assessment programme and will be published in full in Health Technology Assessment; Vol. 24, No. 5. See the NIHR Journals Library website for further project information.
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Affiliation(s)
- Steven J Edwards
- British Medical Journal (BMJ) Technology Assessment Group, London, UK
| | | | - Tracey Jhita
- British Medical Journal (BMJ) Technology Assessment Group, London, UK
| | - Kayleigh Kew
- British Medical Journal (BMJ) Technology Assessment Group, London, UK
| | - Peter Cain
- British Medical Journal (BMJ) Technology Assessment Group, London, UK
| | - Gemma Marceniuk
- British Medical Journal (BMJ) Technology Assessment Group, London, UK
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13
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Gomis M, Dávalos A, Purroy F, Cardona P, Rodríguez-Campello A, Martí-Fábregas J, Pagola J, Pardo L, Muñoz-Narbona L, Benabdelhak I, Lara-Rodríguez B, Cuadrado-Godia E, Martínez-Domeño A, Juega JM, Serena J, Alvarez-Ballano J, Paipa A, Roquer J, Abilleira S, Neeter R, van de Groep A, Molina C. Stroke Risk Analysis, a System With a High Detection Rate of Atrial Fibrillation in Stroke and Transient Ischemic Attack. Stroke 2019; 51:262-267. [PMID: 31842722 DOI: 10.1161/strokeaha.119.026354] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background and Purpose- Stroke Risk Analysis (SRA) comprises an algorithm for automated analysis of ECG monitoring, enabling the detection of paroxysmal atrial fibrillation (pxAF) and identifying patterns indicating a high risk of atrial fibrillation (R_AF). We compared Holter-enabled continuous ECG monitoring in combination with SRA (hSRA) with standard continuous ECG monitoring for pxAF detection in patients with acute ischemic stroke. Also, we sought to identify whether the detection of R_AF patterns during the first cycle (first 2 hours) of hSRA recording was associated with the detection of pxAF during the Stroke Unit stay. Methods- We enrolled 524 consecutive patients admitted in the Stroke Unit with acute ischemic stroke or transient ischemic attack with neither history of AF nor AF at admission into a prospective multicentric observational analytic clinical study with intrapatient comparison, who received both continuous ECG monitoring as well as hSRA up to 7 days. Investigators were blinded to hSRA results unless pxAF was detected on SRA. Results- Of the 524 consecutive acute stroke patients (median age, 70.0 years; 60% male; acute ischemic stroke 93%, transient ischemic attack 7%), 462 were eligible and included in the study. Among 462 patients with hSRA available for 66 hours, AF was documented by hSRA in 79 patients (17.1%). From this group, 45 AF cases (9.7%) were confirmed after review by an independent and blinded cardiologist. continuous ECG monitoring detected 21 AF cases (4.3%; P<0.0001). hSRA detected R_AF patterns in 92 patients. 35 out of the 92 R_AF patients showed an episode of AF during the Stroke Unit stay. Predictive values of R_AF patterns within the first cycle of hSRA were: sensitivity 71%, specificity 86%, positive predictive value 38%, and negative predictive value 96%. Conclusions- Automated analysis using SRA technology strongly improves pxAF detection in acute ischemic stroke patients compared with continuous ECG monitoring. The predictive value of a R_AF pattern, as detected by hSRA during the first few hours after admission, deserves further investigation.
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Affiliation(s)
- Meritxell Gomis
- From the Department of Neurosciences, Hospital Universitari Germans Trias i Pujol, Neurosciences, Badalona-Barcelona, Spain (M.G., A.D., L.M.-N., J.A.-B.)
| | - Antoni Dávalos
- From the Department of Neurosciences, Hospital Universitari Germans Trias i Pujol, Neurosciences, Badalona-Barcelona, Spain (M.G., A.D., L.M.-N., J.A.-B.)
| | - Francisco Purroy
- Department of Neurology, Hospital Arnau de Vilanova, Lleida, Spain (F.P., I.B.)
| | - Pere Cardona
- Department of Neurology, Hospital de Bellvitge, Hospitalet de Llobregat-Barcelona, Spain (P.C., B.L.-R., A.P)
| | | | - Joan Martí-Fábregas
- Department of Neurology, Hospital de Sant Pau, Barcelona, Spain (J.M.-F., A.M.-D.)
| | - Jorge Pagola
- Department of Neurology, Hospital Vall d'Hebrón, Barcelona, Spain (J.P., J.M.J., C.M.)
| | - Laura Pardo
- Department of Neurology, Hospital Doctor Josep Trueta, Girona, Spain (L.P., J.S.)
| | - Lucía Muñoz-Narbona
- From the Department of Neurosciences, Hospital Universitari Germans Trias i Pujol, Neurosciences, Badalona-Barcelona, Spain (M.G., A.D., L.M.-N., J.A.-B.)
| | - Ikram Benabdelhak
- Department of Neurology, Hospital Arnau de Vilanova, Lleida, Spain (F.P., I.B.)
| | - Blanca Lara-Rodríguez
- Department of Neurology, Hospital de Bellvitge, Hospitalet de Llobregat-Barcelona, Spain (P.C., B.L.-R., A.P)
| | - Elisa Cuadrado-Godia
- Department of Neurology, Hospital de Mar, Barcelona, Spain (A.R.-C., E.C.-G., J.R.)
| | | | - Jesús Maria Juega
- Department of Neurology, Hospital Vall d'Hebrón, Barcelona, Spain (J.P., J.M.J., C.M.)
| | - Joaquin Serena
- Department of Neurology, Hospital Doctor Josep Trueta, Girona, Spain (L.P., J.S.)
| | - Jesús Alvarez-Ballano
- From the Department of Neurosciences, Hospital Universitari Germans Trias i Pujol, Neurosciences, Badalona-Barcelona, Spain (M.G., A.D., L.M.-N., J.A.-B.)
| | - Andrés Paipa
- Department of Neurology, Hospital de Bellvitge, Hospitalet de Llobregat-Barcelona, Spain (P.C., B.L.-R., A.P)
| | - Jaume Roquer
- Department of Neurology, Hospital de Mar, Barcelona, Spain (A.R.-C., E.C.-G., J.R.)
| | - Sònia Abilleira
- Stroke Programme, Agency for Health Quality and Assessment of Catalonia, Barcelona, Spain (S.A.)
| | - Rob Neeter
- Evina Health Solutions, the Netherlands (R.N., A.v.d.G.)
| | | | - Carlos Molina
- Department of Neurology, Hospital Vall d'Hebrón, Barcelona, Spain (J.P., J.M.J., C.M.)
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14
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Maervoet J, Bossers N, Borge RP, Hilpert ST, van Engen A, Smala A. Use of insertable cardiac monitors for the detection of atrial fibrillation in patients with cryptogenic stroke in the United States is cost-effective. J Med Econ 2019; 22:1221-1234. [PMID: 31480905 DOI: 10.1080/13696998.2019.1663355] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Objectives: Atrial fibrillation (AF) is the most common arrhythmia and a major marker of ischemic stroke risk. Early detection is crucial and, once diagnosed, anticoagulation therapy can be initiated to reduce stroke risk. The aim of this study was to assess the cost-effectiveness of employing an insertable cardiac monitor (ICM), BIOMONITOR, for the detection of AF compared to standard of care (SoC) ECG and Holter monitoring in patients with cryptogenic stroke, that is, stroke of unknown origin and where paroxysmal, silent AF is suspected. Materials and methods: A Markov model was developed which consisted of five main health states reflecting the potential lifetime evolution of the AF disease: post cryptogenic stroke (index event), subsequent mild, moderate and severe stroke, and death. Sub-states were included to track a patient's AF diagnostic status and the use of antiplatelet or anticoagulant therapy. AF detection was assumed to result in a treatment switch from aspirin to anticoagulants, except among those with a history of major bleeding. Detection yield and accuracy, clinical actions and treatment effects were derived from the literature and validated by an expert clinician. All relevant costs from a US Medicare perspective were included. Results and conclusions: An ICM-based strategy was associated with a reduction of 37 secondary ischemic strokes per 1000 patients monitored compared with SoC. Total per-patient costs with an ICM were higher (US$90,052 vs. US$85,157) although stroke-related costs were reduced. The use of an ICM was associated with a base-case incremental cost-effectiveness ratio of US$18,487 per life year gained compared with SoC and US$25,098 per quality-adjusted life year gained, below established willingness-to-pay thresholds. The conclusions were found to be robust over a range of input values. From a US Medicare perspective the use of a BIOMONITOR ICM represents a cost-effective diagnostic strategy for patients with cryptogenic stroke and suspected AF.
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Affiliation(s)
| | - N Bossers
- Performation Healthcare , Bilthoven , the Netherlands
| | - R P Borge
- Abington Hospital - Jefferson Health , Abington , PA , USA
| | | | | | - A Smala
- BIOTRONIK SE & Co KG , Berlin , Germany
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15
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Bertaglia E, Blank B, Blomström-Lundqvist C, Brandes A, Cabanelas N, Dan GA, Dichtl W, Goette A, de Groot JR, Lubinski A, Marijon E, Merkely B, Mont L, Piorkowski C, Sarkozy A, Sulke N, Vardas P, Velchev V, Wichterle D, Kirchhof P. Atrial high-rate episodes: prevalence, stroke risk, implications for management, and clinical gaps in evidence. Europace 2019; 21:1459-1467. [PMID: 31377792 PMCID: PMC6788209 DOI: 10.1093/europace/euz172] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Accepted: 07/15/2019] [Indexed: 12/20/2022] Open
Abstract
Self-terminating atrial arrhythmias are commonly detected on continuous rhythm monitoring, e.g. by pacemakers or defibrillators. It is unclear whether the presence of these arrhythmias has therapeutic consequences. We sought to summarize evidence on the prevalence of atrial high-rate episodes (AHREs) and their impact on risk of stroke. We performed a comprehensive, tabulated review of published literature on the prevalence of AHRE. In patients with AHRE, but without atrial fibrillation (AF), we reviewed the stroke risk and the potential risk/benefit of oral anticoagulation. Atrial high-rate episodes are found in 10-30% of AF-free patients. Presence of AHRE slightly increases stroke risk (0.8% to 1%/year) compared with patients without AHRE. Atrial high-rate episode of longer duration (e.g. those >24 h) could be associated with a higher stroke risk. Oral anticoagulation has the potential to reduce stroke risk in patients with AHRE but is associated with a rate of major bleeding of 2%/year. Oral anticoagulation is not effective in patients with heart failure or survivors of a stroke without AF. It remains unclear whether anticoagulation is effective and safe in patients with AHRE. Atrial high-rate episodes are common and confer a slight increase in stroke risk. There is true equipoise on the best way to reduce stroke risk in patients with AHRE. Two ongoing trials (NOAH-AFNET 6 and ARTESiA) will provide much-needed information on the effectiveness and safety of oral anticoagulation using non-vitamin K antagonist oral anticoagulants in patients with AHRE.
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Affiliation(s)
- Emanuele Bertaglia
- Department of Cardiac, Vascular and Thoracic Sciences, Azienda Ospedaliera, Padua, Italy
| | | | | | - Axel Brandes
- Department of Clinical Research, University of Southern Denmark, Odense, Denmark
- Department of Cardiology, Odense University Hospital, Odense, Denmark
| | - Nuno Cabanelas
- Arrhythmias Unit of Cardiology Department, Hospital Prof. Dr. Fernando Fonseca, Amadora-Sintra, Portugal
| | - G -Andrei Dan
- Colentina University Hospital, Medicine University “Carol Davila”, Bucharest, Romania
| | - Wolfgang Dichtl
- University Hospital of Internal Medicine III, Medical University Innsbruck, Innsbruck, Austria
| | - Andreas Goette
- Atrial Fibrillation NETwork (AFNET), Muenster, Germany
- St. Vincenz Hospital Paderborn, Cardiology and Intensive Care Medicine, Paderborn, Germany
| | - Joris R de Groot
- Department of Cardiology, Heart Center, Amsterdam University Medical Center, University of Amsterdam, Amsterdam, the Netherlands
| | - Andrzej Lubinski
- Department of Interventional Cardiology and Arrhythmias, Medical University of Lodz, Lodz, Poland
| | - Eloi Marijon
- Cardiac Electrophysiology Section, European Georges Pompidou Hospital, Paris, France
| | - Béla Merkely
- Heart and Vascular Center, Semmelweis University Budapest, Budapest, Hungary
| | - Lluis Mont
- Cardiovascular Clinical Institute, Hospital Clinic, Universitat de Barcelona, Catalonia, Spain
| | | | | | - Neil Sulke
- Eastbourne District General Hospital, Eastbourne, UK
| | - Panos Vardas
- Heart Sector, Hygeia Group Hospitals, Athens, Greece
| | - Vasil Velchev
- Cardiology Clinic, St. Anna University Hospital, Medical University Sofia, Sofia, Bulgaria
| | - Dan Wichterle
- Institute for Clinical and Experimental Medicine, Prague, Czech Republic
| | - Paulus Kirchhof
- Atrial Fibrillation NETwork (AFNET), Muenster, Germany
- Institute of Cardiovascular Sciences, University of Birmingham, UHB and Sandwell & West Birmingham Hospitals NHS Trusts, IBR 126a, Wolfson Drive, Birmingham B15 2TT, UK
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16
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Tsivgoulis G, Katsanos AH, Köhrmann M, Caso V, Perren F, Palaiodimou L, Deftereos S, Giannopoulos S, Ellul J, Krogias C, Mavridis D, Triantafyllou S, Alexandrov AW, Schellinger PD, Alexandrov AV. Duration of Implantable Cardiac Monitoring and Detection of Atrial Fibrillation in Ischemic Stroke Patients: A Systematic Review and Meta-Analysis. J Stroke 2019; 21:302-311. [PMID: 31590474 PMCID: PMC6780018 DOI: 10.5853/jos.2019.01067] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2019] [Revised: 06/04/2019] [Accepted: 06/14/2019] [Indexed: 01/01/2023] Open
Abstract
BACKGROUND AND PURPOSE Current guidelines do not provide firm directions on atrial fibrillation (AF) screening after ischemic stroke (IS). We sought to investigate the association of implantable cardiac monitoring (ICM) duration with the yield of AF detection in IS patients. METHODS We included studies reporting AF detection rates by ICM in IS patients with negative initial AF screening. We excluded studies reporting prolonged cardiac monitoring with devices other than ICM, not providing AF detection rates or monitoring duration, and reporting overlapping data for the same population. The random-effects model was used for all pooled estimates and meta-regression analyses. RESULTS We included 28 studies (4,531 patients, mean age 65 years). In meta-regression analyses, the proportion of AF detection by ICM was independently associated with monitoring duration (coefficient=0.015; 95% confidence interval [CI], 0.005 to 0.024) and mean patient age (coefficient=0.009; 95% CI, 0.003 to 0.015). No associations were detected with other patient characteristics, including IS subtype (cryptogenic vs. embolic stroke of undetermined source) or time from IS onset to CM implantation. In subgroup analyses, significant differences (P<0.001) in the AF detection rates were found for ICM duration (<6 months: 5% [95% CI, 3% to 6%]; ≥6 and ≤12 months: 21% [95% CI, 16% to 25%]; >12 and ≤24 months: 26% [95% CI, 22% to 31%]; >24 months: 34% [95% CI, 29% to 39%]). CONCLUSION s Extended duration of ICM monitoring and increased patient age are factors that substantially increase AF detection in IS patients with initial negative AF screening.
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Affiliation(s)
- Georgios Tsivgoulis
- Second Department of Neurology, Attikon Hospital, School of Medicine, National and Kapodistrian University of Athens, Athens, Greece
- Department of Neurology, University of Tennessee Health Science Center, Memphis, TN, USA
| | - Aristeidis H. Katsanos
- Second Department of Neurology, Attikon Hospital, School of Medicine, National and Kapodistrian University of Athens, Athens, Greece
- Department of Neurology, University of Ioannina School of Medicine, Ioannina, Greece
| | - Martin Köhrmann
- Department of Neurology, Essen University Hospital, Essen, Germany
| | - Valeria Caso
- Stroke Unit, Division of Cardiovascular Medicine, University of Perugia, Perugia, Italy
| | - Fabienne Perren
- Department of Neurology, University Hospital of Geneva, Geneva, Switzerland
| | - Lina Palaiodimou
- Second Department of Neurology, Attikon Hospital, School of Medicine, National and Kapodistrian University of Athens, Athens, Greece
| | - Spyridon Deftereos
- Second Department of Cardiology, Attikon Hospital, School of Medicine, National and Kapodistrian University of Athens, Athens, Greece
| | - Sotirios Giannopoulos
- Department of Neurology, University of Ioannina School of Medicine, Ioannina, Greece
| | - John Ellul
- Department of Neurology, University Hospital of Patras, School of Medicine, University of Patras, Patras, Greece
| | - Christos Krogias
- Department of Neurology, St. Josef-Hospital, Ruhr University, Bochum, Germany
| | - Dimitris Mavridis
- Department of Primary Education, University of Ioannina, Ioannina, Greece
| | - Sokratis Triantafyllou
- Second Department of Neurology, Attikon Hospital, School of Medicine, National and Kapodistrian University of Athens, Athens, Greece
| | - Anne W. Alexandrov
- Department of Neurology, University of Tennessee Health Science Center, Memphis, TN, USA
| | - Peter D. Schellinger
- Department of Neurology and Neurogeriatry, Johannes Wesling Medical Center, Ruhr University Bochum, Minden, Germany
| | - Andrei V. Alexandrov
- Department of Neurology, University of Tennessee Health Science Center, Memphis, TN, USA
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17
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Ratajczak-Tretel B, Lambert AT, Johansen H, Halvorsen B, Bjerkeli V, Russell D, Sandset EC, Ihle-Hansen H, Eriksen E, Næss H, Novotny V, Khanevski AN, Truelsen TC, Idicula T, Ægidius KL, Tobro H, Krogseth SB, Ihle-Hansen H, Hagberg G, Kruuse C, Arntzen K, Bakkejord GK, Villseth M, Nakstad I, Eldøen G, Shafiq R, Gulsvik A, Kurz M, Rezai M, Sømark J, Tingvoll SH, Jonassen C, Ingebrigtsen S, Steffensen LH, Kremer C, Atar D, Aamodt AH. Atrial fibrillation in cryptogenic stroke and transient ischaemic attack - The Nordic Atrial Fibrillation and Stroke (NOR-FIB) Study: Rationale and design. Eur Stroke J 2019; 4:172-180. [PMID: 31259265 DOI: 10.1177/2396987319837089] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2018] [Accepted: 02/13/2019] [Indexed: 01/01/2023] Open
Abstract
Purpose Paroxysmal atrial fibrillation is often suspected as a probable cause of cryptogenic stroke. Continuous long-term ECG monitoring using insertable cardiac monitors is a clinically effective technique to screen for atrial fibrillation and superior to conventional follow-up in cryptogenic stroke. However, more studies are needed to identify factors which can help selecting patients with the highest possibility of detecting atrial fibrillation with prolonged rhythm monitoring. The clinical relevance of short-term atrial fibrillation, the need for medical intervention and the evaluation as to whether intervention results in improved clinical outcomes should be assessed. Method The Nordic Atrial Fibrillation and Stroke Study is an international, multicentre, prospective, observational trial evaluating the occurrence of occult atrial fibrillation in cryptogenic stroke and transient ischaemic attack. Patients with cryptogenic stroke or transient ischaemic attack from the Nordic countries are included and will have the Reveal LINQ® Insertable cardiac monitor system implanted for 12 months for atrial fibrillation detection. Biomarkers which can be used as predictors for atrial fibrillation and may identify patients, who could derive the most clinical benefit from the detection of atrial fibrillation by prolonged monitoring, are being studied. Conclusion The primary endpoint is atrial fibrillation burden within 12 months of continuous rhythm monitoring. Secondary endpoints are atrial fibrillation burden within six months, levels of biomarkers predicting atrial fibrillation, CHA2DS2-VASc score, incidence of recurrent stroke or transient ischaemic attack, use of anticoagulation and antiarrhythmic drugs, and quality of life measurements. The clinical follow-up period is 12 months. The study started in 2017 and the completion is expected at the end of 2020.
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Affiliation(s)
- Barbara Ratajczak-Tretel
- Department of Neurology, Østfold Hospital Trust, Grålum, Norway.,Institute of Clinical Medicine, University of Oslo, Oslo, Norway
| | - Anna Tancin Lambert
- Department of Neurology, Østfold Hospital Trust, Grålum, Norway.,Institute of Clinical Medicine, University of Oslo, Oslo, Norway
| | | | - Bente Halvorsen
- Research Institute of Internal Medicine, Oslo University Hospital, Oslo, Norway.,Institute of Clinical Medicine, University of Oslo, Oslo, Norway
| | - Vigdis Bjerkeli
- Research Institute of Internal Medicine, Oslo University Hospital, Oslo, Norway
| | - David Russell
- Department of Neurology, Oslo University Hospital, Oslo, Norway.,Institute of Clinical Medicine, University of Oslo, Oslo, Norway
| | | | - Hege Ihle-Hansen
- Department of Geriatric Medicine, Oslo University Hospital, Oslo, Norway
| | - Erik Eriksen
- Department of Neurology, Oslo University Hospital, Oslo, Norway
| | - Halvor Næss
- Department of Neurology, Haukeland University Hospital, Bergen, Norway
| | - Vojtech Novotny
- Department of Neurology, Haukeland University Hospital, Bergen, Norway
| | | | - Thomas C Truelsen
- Department of Neurology, Rigshospitalet University Hospital, Copenhagen, Denmark
| | - Titto Idicula
- Department of Neurology, St. Olav University Hospital, Trondheim, Norway
| | - Karen L Ægidius
- Department of Neurology, Bispebjerg University Hospital, Copenhagen, Denmark
| | - Håkon Tobro
- Department of Neurology, Telemark Hospital, Skien, Norway
| | - Siv B Krogseth
- Department of Neurology, Vestfold Hospital, Tønsberg, Norway
| | - Håkon Ihle-Hansen
- Department of Internal Medicine, Vestre Viken Hospital Trust, Bærum Hospital, Bærum, Norway
| | - Guri Hagberg
- Department of Internal Medicine, Vestre Viken Hospital Trust, Bærum Hospital, Bærum, Norway
| | - Christina Kruuse
- Department of Neurology, Herlev Gentofte Hospital, Copenhagen, Denmark
| | | | | | - Maja Villseth
- Department of Neurology, Drammen Hospital, Vestre Viken Hospital Trust, Drammen, Norway
| | - Ingvild Nakstad
- Department of Neurology, Drammen Hospital, Vestre Viken Hospital Trust, Drammen, Norway
| | | | - Raheel Shafiq
- Department of Neurology, Molde Hospital, Molde, Norway
| | - Anne Gulsvik
- Department of Internal Medicine, Diakonhjemmet Hospital, Oslo, Norway
| | - Martin Kurz
- Department of Neurology, Stavanger University Hospital, Stavanger, Norway
| | - Mehdi Rezai
- Department of Neurology, Stavanger University Hospital, Stavanger, Norway
| | - Jesper Sømark
- Department of Neurology, Innlandet Hospital Trust, Lillehammer, Norway
| | | | - Christine Jonassen
- Center of Laboratory Medicine, Østfold Hospital Trust, Grålum, Norway.,Department of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences, Ås, Norway
| | | | | | - Christine Kremer
- Department of Neurology, Skåne University Hospital, Malmö, Sweden.,Department of Clinical Sciences, Lund University, Malmö, Sweden
| | - Dan Atar
- Institute of Clinical Medicine, University of Oslo, Oslo, Norway.,Department of Cardiology B, Oslo University Hospital, Ullevål, Oslo, Norway
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Sanna T. Long-term monitoring to detect atrial fibrillation with the indwelling implantable cardiac monitors. Int J Stroke 2018; 13:893-904. [PMID: 30091680 DOI: 10.1177/1747493018790023] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
An increasing number of detection tools are available and several detection strategies have been described to pursue the diagnosis of atrial fibrillation to prevent ischemic stroke. Monitoring tools include standard electrocardiography, snapshot single-lead recordings with professional or personal devices (e.g. smartphone-based), Holter monitor, external devices with long-term recording capabilities, and cardiac implantable electronic devices, including pacemakers, implantable cardioverter defibrillators and insertable cardiac monitors. Insertable cardiac monitors have shown high sensitivity and specificity for the detection of atrial fibrillation, allow up to three years of continuous monitoring, do not require cooperation of the patient, are well tolerated, have a short device-related time delay between detection of atrial fibrillation and notification to the physician, provide information on atrial fibrillation burden and are minimally invasive. On the other hand, insertable cardiac monitors require a considerable use of resources to process the recordings and have a significant initial cost. Studies conducted with insertable cardiac monitors on patients with prior stroke and on patients with risk factors for stroke but no prior cerebrovascular events or atrial fibrillation have consistently shown a measurable incidence of atrial fibrillation at follow-up. However, the effectiveness of oral anticoagulations in reducing the incidence of ischemic stroke in patients with atrial fibrillation lasting less than 24 h, though reasonable, is currently unproven. The future of atrial fibrillation detection tools and atrial fibrillation detection strategies will be influenced by ongoing studies exploring whether oral anticoagulations reduce the incidence of stroke in patients with atrial fibrillation burden lower than 24 h.
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