1
|
Duvillier L, Demolder A, Van Renterghem S, De Mey C, West F, De Pooter J. Real-world battery longevity of implantable loop recorders implanted for unexplained syncope: Results from a large single-center registry. J Cardiovasc Electrophysiol 2024. [PMID: 39252439 DOI: 10.1111/jce.16420] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/23/2024] [Revised: 08/12/2024] [Accepted: 08/19/2024] [Indexed: 09/11/2024]
Abstract
BACKGROUND/PURPOSE Implantable loop recorders (ILR) are increasingly used in cardiac rhythm monitoring and diagnostic work-up of unexplained syncope. ILR battery longevity, according to manufacturers' product performance specifications, typically ranges between 2 and 4 years, but real-world data in this population are lacking. METHODS This monocentric, prospective, observational study included consecutive patients with unexplained syncope undergoing ILR implantation between October 2007 and 2019. The main purpose was to determine real-world battery longevity of ILRs. Diagnostic yield and relationship between arrhythmogenic diagnosis and duration of ILR monitoring were explored. RESULTS The study included 309 patients (59 years [38-73], 49% female) with ILR implantation for unexplained syncope. Median battery longevity was 42 [40-45] months. A total of 99.5% of ILRs reached prespecified battery longevity. The time to end-of-life varied by up to 33 months among the same ILR models. Overall arrhythmogenic diagnostic yield counted 27% (73% sick sinus syndrome, 20% atrioventricular block, and 7% ventricular tachycardia). Median time to diagnosis was 10 [2-25] months, with the latest event at 43 months. The cumulative diagnostic yield for arrhythmogenic event explaining syncope was 4.2%, 6.1%, 9.4%, 14.6%, 19.4%, and 26.7% at 1, 2, 6, 12, 24, and 48 months, respectively. In univariate analysis, first degree AV block and prolonged HV time on EP study were predictors of diagnosis, while QRS duration abnormality borderline missed significance. CONCLUSIONS Real-world battery longevity of ILRs matched industry projected longevity in 99.5% of patients implanted with ILR for unexplained syncope. A battery longevity of minimum 3.5 years is recommended to maximize the diagnostic yield in this population.
Collapse
Affiliation(s)
- Lukas Duvillier
- Department of Cardiology, Heart Center, Ghent University Hospital, Ghent, Belgium
| | - Anthony Demolder
- Department of Cardiology, Heart Center, Ghent University Hospital, Ghent, Belgium
| | - Sally Van Renterghem
- Department of Cardiology, Heart Center, Ghent University Hospital, Ghent, Belgium
| | - Caroline De Mey
- Department of Cardiology, Heart Center, Ghent University Hospital, Ghent, Belgium
| | - Filip West
- Department of Cardiology, Heart Center, Ghent University Hospital, Ghent, Belgium
| | - Jan De Pooter
- Department of Cardiology, Heart Center, Ghent University Hospital, Ghent, Belgium
| |
Collapse
|
2
|
Takase B, Ikeda T, Shimizu W, Abe H, Aiba T, Chinushi M, Koba S, Kusano K, Niwano S, Takahashi N, Takatsuki S, Tanno K, Watanabe E, Yoshioka K, Amino M, Fujino T, Iwasaki YK, Kohno R, Kinoshita T, Kurita Y, Masaki N, Murata H, Shinohara T, Yada H, Yodogawa K, Kimura T, Kurita T, Nogami A, Sumitomo N. JCS/JHRS 2022 Guideline on Diagnosis and Risk Assessment of Arrhythmia. Circ J 2024; 88:1509-1595. [PMID: 37690816 DOI: 10.1253/circj.cj-22-0827] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 09/12/2023]
Affiliation(s)
| | - Takanori Ikeda
- Department of Cardiovascular Medicine, Toho University Faculty of Medicine
| | - Wataru Shimizu
- Department of Cardiovascular Medicine, Nippon Medical School
| | - Haruhiko Abe
- Department of Heart Rhythm Management, University of Occupational and Environmental Health, Japan
| | - Takeshi Aiba
- Department of Clinical Laboratory Medicine and Genetics, National Cerebral and Cardiovascular Center
| | - Masaomi Chinushi
- School of Health Sciences, Niigata University School of Medicine
| | - Shinji Koba
- Division of Cardiology, Department of Medicine, Showa University School of Medicine
| | - Kengo Kusano
- Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center
| | - Shinichi Niwano
- Department of Cardiovascular Medicine, Kitasato University School of Medicine
| | - Naohiko Takahashi
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University
| | - Seiji Takatsuki
- Department of Cardiology, Keio University School of Medicine
| | - Kaoru Tanno
- Cardiology Division, Cardiovascular Center, Showa University Koto-Toyosu Hospital
| | - Eiichi Watanabe
- Division of Cardiology, Department of Internal Medicine, Fujita Health University Bantane Hospital
| | | | - Mari Amino
- Department of Cardiology, Tokai University School of Medicine
| | - Tadashi Fujino
- Department of Cardiovascular Medicine, Toho University Faculty of Medicine
| | - Yu-Ki Iwasaki
- Department of Cardiovascular Medicine, Nippon Medical School
| | - Ritsuko Kohno
- Department of Heart Rhythm Management, University of Occupational and Environmental Health, Japan
| | - Toshio Kinoshita
- Department of Cardiovascular Medicine, Toho University Faculty of Medicine
| | - Yasuo Kurita
- Cardiovascular Center, International University of Health and Welfare, Mita Hospital
| | - Nobuyuki Masaki
- Department of Intensive Care Medicine, National Defense Medical College
| | | | - Tetsuji Shinohara
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University
| | - Hirotaka Yada
- Department of Cardiology, International University of Health and Welfare, Mita Hospital
| | - Kenji Yodogawa
- Department of Cardiovascular Medicine, Nippon Medical School
| | - Takeshi Kimura
- Cardiovascular Medicine, Kyoto University Graduate School of Medicine
| | | | - Akihiko Nogami
- Department of Cardiology, Faculty of Medicine, University of Tsukuba
| | - Naokata Sumitomo
- Department of Pediatric Cardiology, Saitama Medical University International Medical Center
| |
Collapse
|
3
|
Takase B, Ikeda T, Shimizu W, Abe H, Aiba T, Chinushi M, Koba S, Kusano K, Niwano S, Takahashi N, Takatsuki S, Tanno K, Watanabe E, Yoshioka K, Amino M, Fujino T, Iwasaki Y, Kohno R, Kinoshita T, Kurita Y, Masaki N, Murata H, Shinohara T, Yada H, Yodogawa K, Kimura T, Kurita T, Nogami A, Sumitomo N. JCS/JHRS 2022 Guideline on Diagnosis and Risk Assessment of Arrhythmia. J Arrhythm 2024; 40:655-752. [PMID: 39139890 PMCID: PMC11317726 DOI: 10.1002/joa3.13052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2024] [Accepted: 04/22/2024] [Indexed: 08/15/2024] Open
Affiliation(s)
| | - Takanori Ikeda
- Department of Cardiovascular MedicineToho University Faculty of Medicine
| | - Wataru Shimizu
- Department of Cardiovascular MedicineNippon Medical School
| | - Haruhiko Abe
- Department of Heart Rhythm ManagementUniversity of Occupational and Environmental HealthJapan
| | - Takeshi Aiba
- Department of Clinical Laboratory Medicine and GeneticsNational Cerebral and Cardiovascular Center
| | | | - Shinji Koba
- Division of Cardiology, Department of MedicineShowa University School of Medicine
| | - Kengo Kusano
- Department of Cardiovascular MedicineNational Cerebral and Cardiovascular Center
| | - Shinichi Niwano
- Department of Cardiovascular MedicineKitasato University School of Medicine
| | - Naohiko Takahashi
- Department of Cardiology and Clinical Examination, Faculty of MedicineOita University
| | | | - Kaoru Tanno
- Cardiovascular Center, Cardiology DivisionShowa University Koto‐Toyosu Hospital
| | - Eiichi Watanabe
- Division of Cardiology, Department of Internal MedicineFujita Health University Bantane Hospital
| | | | - Mari Amino
- Department of CardiologyTokai University School of Medicine
| | - Tadashi Fujino
- Department of Cardiovascular MedicineToho University Faculty of Medicine
| | - Yu‐ki Iwasaki
- Department of Cardiovascular MedicineNippon Medical School
| | - Ritsuko Kohno
- Department of Heart Rhythm ManagementUniversity of Occupational and Environmental HealthJapan
| | - Toshio Kinoshita
- Department of Cardiovascular MedicineToho University Faculty of Medicine
| | - Yasuo Kurita
- Cardiovascular Center, Mita HospitalInternational University of Health and Welfare
| | - Nobuyuki Masaki
- Department of Intensive Care MedicineNational Defense Medical College
| | | | - Tetsuji Shinohara
- Department of Cardiology and Clinical Examination, Faculty of MedicineOita University
| | - Hirotaka Yada
- Department of CardiologyInternational University of Health and Welfare Mita Hospital
| | - Kenji Yodogawa
- Department of Cardiovascular MedicineNippon Medical School
| | - Takeshi Kimura
- Cardiovascular MedicineKyoto University Graduate School of Medicine
| | | | - Akihiko Nogami
- Department of Cardiology, Faculty of MedicineUniversity of Tsukuba
| | - Naokata Sumitomo
- Department of Pediatric CardiologySaitama Medical University International Medical Center
| | | |
Collapse
|
4
|
De Ciancio G, Sadoul N, Hammache N, Pace N, Echivard M, Freysz L, Blangy H, Sellal JM, Olivier A. Bradycardia risk stratification with implantable loop recorder after unexplained syncope. Arch Cardiovasc Dis 2024; 117:186-194. [PMID: 38326152 DOI: 10.1016/j.acvd.2023.12.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/17/2023] [Revised: 12/05/2023] [Accepted: 12/12/2023] [Indexed: 02/09/2024]
Abstract
BACKGROUND An implantable loop recorder is an effective tool for diagnosing unexplained syncope. However, after a first episode in non-high-risk patients, the usefulness of implantable loop recorder implantation remains unclear. AIMS To analyse relevant risk factors for significant bradycardia in order to identify patients who do or do not benefit from implantable loop recorder implantation. Also, to study whether implantable loop recorder implantation with remote monitoring is associated with less recurrence of traumatic syncope. METHODS This was a retrospective monocentric study including patients with implantable loop recorder implantation after unexplained syncope, using remote monitoring and iterative consultations. RESULTS Two hundred and thirty-seven patients were implanted for unexplained syncope. Significant bradycardia occurred in 53 patients (22.4%): 23 (43.4%) caused by paroxysmal atrioventricular block and 30 (56.6%) caused by sinus node dysfunction, leading to permanent pacemaker implantation in 48 patients. Compared with younger patients, there was a 3.46-fold increase (95% confidence interval 1.92-6.23; P<0.0001) in the risk of significant bradycardia in patients aged≥60 years. Based on multivariable analysis, only "typical syncope" was associated with significant bradycardia occurrence (hazard ratio 3.14, 95% confidence interval 1.75-5.65; P=0.0001). There was no recurrence of significant bradycardia with traumatic complications among patients implanted for traumatic syncope. CONCLUSIONS This study shows that: (1) implantable loop recorders identify more significant bradycardia in patients aged≥60 presenting with a first non-high-risk typical syncope, suggesting that an implantable loop recorder should be implanted after a first episode of unexplained syncope in such conditions; and (2) after traumatic syncope, implantable loop recorder implantation is safe, and is associated with little or no recurrence of traumatic syncope.
Collapse
Affiliation(s)
- Guillaume De Ciancio
- Department of Cardiology, Nancy University Hospital, 54511 Vandœuvre-lès-Nancy, France.
| | - Nicolas Sadoul
- Department of Cardiology, Nancy University Hospital, 54511 Vandœuvre-lès-Nancy, France; Université de Lorraine, Nancy Medical School, 54505 Vandœuvre-lès-Nancy, France
| | - Nefissa Hammache
- Department of Cardiology, Nancy University Hospital, 54511 Vandœuvre-lès-Nancy, France
| | - Nathalie Pace
- Department of Cardiology, Nancy University Hospital, 54511 Vandœuvre-lès-Nancy, France
| | - Mathieu Echivard
- Department of Cardiology, Nancy University Hospital, 54511 Vandœuvre-lès-Nancy, France
| | - Luc Freysz
- Department of Cardiology, Nancy University Hospital, 54511 Vandœuvre-lès-Nancy, France
| | - Hugues Blangy
- Department of Cardiology, Nancy University Hospital, 54511 Vandœuvre-lès-Nancy, France
| | - Jean Marc Sellal
- Department of Cardiology, Nancy University Hospital, 54511 Vandœuvre-lès-Nancy, France; Université de Lorraine, Nancy Medical School, 54505 Vandœuvre-lès-Nancy, France
| | - Arnaud Olivier
- Department of Cardiology, Nancy University Hospital, 54511 Vandœuvre-lès-Nancy, France
| |
Collapse
|
5
|
Fedorowski A, Kulakowski P, Brignole M, de Lange FJ, Kenny RA, Moya A, Rivasi G, Sheldon R, Van Dijk G, Sutton R, Deharo JC. Twenty-five years of research on syncope. Europace 2023; 25:euad163. [PMID: 37622579 PMCID: PMC10450792 DOI: 10.1093/europace/euad163] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2023] [Accepted: 05/30/2023] [Indexed: 08/26/2023] Open
Abstract
Over the last 25 years, the Europace journal has greatly contributed to dissemination of research and knowledge in the field of syncope. More than 400 manuscripts have been published in the journal. They undoubtedly improved our understanding of syncope. This symptom is now clearly differentiated from other forms of transient loss of consciousness. The critical role of vasodepression and/or cardioinhibition as final mechanisms of reflex syncope is emphasized. Current diagnostic approach sharply separates between cardiac and autonomic pathways. Physiologic insights have been translated, through rigorously designed clinical trials, into non-pharmacological or pharmacological interventions and interventional therapies. The following manuscript is intended to give the reader the current state of the art of knowledge of syncope by highlighting landmark contributions of the Europace journal.
Collapse
Affiliation(s)
- Artur Fedorowski
- Department of Cardiology, Karolinska University Hospital, Eugeniavägen 3, 171 76 Solna, Stockholm, Sweden
- Department of Medicine, Karolinska Institute, Solnavägen 1, 171 77 Solna, Stockholm, Sweden
- Department of Clinical Sciences, Lund University, 214 28 Malmö, Sweden
| | - Piotr Kulakowski
- Department of Cardiology, Medical Centre for Postgraduate Education, Grochowski Hospital, Ul. Grenadierow 51/59, 04-073 Warsaw, Poland
| | - Michele Brignole
- Department of Cardiology, S. Luca Hospital, IRCCS, Istituto Auxologico Italiano, Piazzale Brescia 20, 20149 Milan, Italy
| | - Frederik J de Lange
- Department of Clinical and Experimental Cardiology, Heart Center, Amsterdam Cardiovascular Sciences, Amsterdam UMC, University of Amsterdam, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands
| | - Rose Anne Kenny
- The Irish Longitudinal Study on Ageing, Trinity College Dublin, 152-160 Pearse St, Dublin, Ireland
- Mercer Institute for Successful Ageing, St. James Hospital, James St, Dublin 8, D08 NHY1Ireland
| | - Angel Moya
- Department of Cardiology, Hospital Universitari Dexeus, Carrer de Sabino Arana 5-19, 08028 Barcelona, Spain
| | - Giulia Rivasi
- Division of Geriatric and Intensive Care Medicine, University of Florence and Azienda Ospedaliero-Universitaria Careggi, Largo Brambilla 3, 50139 Florence, Italy
| | - Robert Sheldon
- Department of Cardiac Sciences, University of Calgary, Libin Cardiovascular Institute, 3310 Hospital Drive NW, Calgary, Alberta T2N 4N1, Canada
| | - Gert Van Dijk
- Department of Neurology, Canisius Wilhelmina Hospital, Weg door Jonkerbos 100, 6532 SZ, Nijmegen, The Netherlands
| | - Richard Sutton
- Department of Cardiology, Hammersmith Hospital, National Heart & Lung Institute, Imperial College, Du Cane Road, London, W12 0HS, United Kingdom
| | - Jean-Claude Deharo
- Assistance Publique − Hôpitaux de Marseille, Centre Hospitalier Universitaire La Timone, Service de Cardiologie, Marseille, France and Aix Marseille Université, C2VN, 264 Rue Saint-Pierre, 13005 Marseille, France
| |
Collapse
|
6
|
Francisco Pascual J, Jordan Marchite P, Rodríguez Silva J, Rivas Gándara N. Arrhythmic syncope: From diagnosis to management. World J Cardiol 2023; 15:119-141. [PMID: 37124975 PMCID: PMC10130893 DOI: 10.4330/wjc.v15.i4.119] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Revised: 02/02/2023] [Accepted: 04/10/2023] [Indexed: 04/20/2023] Open
Abstract
Syncope is a concerning symptom that affects a large proportion of patients. It can be related to a heterogeneous group of pathologies ranging from trivial causes to diseases with a high risk of sudden death. However, benign causes are the most frequent, and identifying high-risk patients with potentially severe etiologies is crucial to establish an accurate diagnosis, initiate effective therapy, and alter the prognosis. The term cardiac syncope refers to those episodes where the cause of the cerebral hypoperfusion is directly related to a cardiac disorder, while arrhythmic syncope is cardiac syncope specifically due to rhythm disorders. Indeed, arrhythmias are the most common cause of cardiac syncope. Both bradyarrhythmia and tachyarrhythmia can cause a sudden decrease in cardiac output and produce syncope. In this review, we summarized the main guidelines in the management of patients with syncope of presumed arrhythmic origin. Therefore, we presented a thorough approach to syncope work-up through different tests depending on the clinical characteristics of the patients, risk stratification, and the management of syncope in different scenarios such as structural heart disease and channelopathies.
Collapse
Affiliation(s)
- Jaume Francisco Pascual
- Unitat d’Arritmies Servei de Cardiologia VHIR, Hospital Universitari Vall d’Hebron, Barcelona 08035, Spain
- Grup de Recerca Cardiovascular, Vall d’Hebron Institut de Recerca, Barcelona 08035, Spain
- CIBER de Enfermedades Cardiovasculares, Instituto de Salud Carlos III, Madrid 28029, Spain
- Departament de Medicina, Universitat Autònoma de Barcelona, Bellaterra 08193, Spain
| | - Pablo Jordan Marchite
- Unitat d’Arritmies Servei de Cardiologia VHIR, Hospital Universitari Vall d’Hebron, Barcelona 08035, Spain
| | - Jesús Rodríguez Silva
- Unitat d’Arritmies Servei de Cardiologia VHIR, Hospital Universitari Vall d’Hebron, Barcelona 08035, Spain
| | - Nuria Rivas Gándara
- Unitat d’Arritmies Servei de Cardiologia VHIR, Hospital Universitari Vall d’Hebron, Barcelona 08035, Spain
- CIBER de Enfermedades Cardiovasculares, Instituto de Salud Carlos III, Madrid 28029, Spain
- Departament de Medicina, Universitat Autònoma de Barcelona, Bellaterra 08193, Spain
| |
Collapse
|
7
|
Reed MJ, Grubb N, Lang C, Goodacre S, O'Brien R, Weir CJ, Thokala P, Freeman N, Blackstock C, Dinsmore L, Boyd J, Adamestam I, Macrae P, Hannigan R, Lobban T. Multicentre open label randomised controlled trial of immediate enhanced ambulatory ECG monitoring versus standard monitoring in acute unexplained syncope patients: the ASPIRED study. BMJ Open 2023; 13:e069530. [PMID: 36822806 PMCID: PMC9950891 DOI: 10.1136/bmjopen-2022-069530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/25/2023] Open
Abstract
INTRODUCTION Diagnosing underlying arrhythmia in emergency department (ED) syncope patients is difficult. There is a evidence that diagnostic yield for detecting underlying arrhythmia is highest when cardiac monitoring devices are applied early, ideally at the index visit. This strategy has the potential to change current syncope management from low diagnostic yield Holter to higher yield ambulatory monitoring, reduce episodes of syncope, reduce risk of recurrence and its potential serious consequences, reduce hospital admissions, reduce overall health costs and increase quality of life by allowing earlier diagnosis, treatment and exclusion of clinically important arrhythmias. METHODS AND ANALYSES This is a UK open prospective parallel group multicentre randomised controlled trial of an immediate 14-day ambulatory patch heart monitor vs standard care in 2234 patients presenting acutely with unexplained syncope. Our patient focused primary endpoint will be number of episodes of syncope at 1 year. Health economic evaluation will estimate the incremental cost per syncope episode avoided and quality-adjusted life year gained. ETHICS AND DISSEMINATION Informed consent for participation will be sought. The ASPIRED trial received a favourable ethical opinion from South East Scotland Research Ethics Committee 01 (21/SS/0073). Results will be disseminated via scientific publication, lay summary and visual abstract. TRIAL REGISTRATION NUMBER ISRCTN 10278811.
Collapse
Affiliation(s)
- Matthew J Reed
- Emergency Medicine Research Group Edinburgh (EMERGE), Royal Infirmary of Edinburgh, Edinburgh, UK
- Acute Care Edinburgh, Usher Institute, University of Edinburgh, Edinburgh, UK
| | - Neil Grubb
- Department of Cardiology, Royal Infirmary Edinburgh, Edinburgh, UK
| | - Chris Lang
- Department of Cardiology, Royal Infirmary Edinburgh, Edinburgh, UK
| | - Steve Goodacre
- School of Health and Related Research (ScHARR), University of Sheffield, Sheffield, UK
| | - Rachel O'Brien
- Emergency Medicine Research Group Edinburgh (EMERGE), Royal Infirmary of Edinburgh, Edinburgh, UK
| | - Christopher J Weir
- Edinburgh Clinical Trials Unit, Usher Institute, University of Edinburgh, Edinburgh, UK
| | - Praveen Thokala
- School of Health and Related Research (ScHARR), University of Sheffield, Sheffield, UK
| | - Nicola Freeman
- Emergency Medicine Research Group Edinburgh (EMERGE), Royal Infirmary of Edinburgh, Edinburgh, UK
| | - Caroline Blackstock
- Emergency Medicine Research Group Edinburgh (EMERGE), Royal Infirmary of Edinburgh, Edinburgh, UK
| | - Lynn Dinsmore
- Edinburgh Clinical Trials Unit, Usher Institute, University of Edinburgh, Edinburgh, UK
| | - Julia Boyd
- Edinburgh Clinical Trials Unit, Usher Institute, University of Edinburgh, Edinburgh, UK
| | - Imad Adamestam
- Edinburgh Clinical Trials Unit, Usher Institute, University of Edinburgh, Edinburgh, UK
| | - Pam Macrae
- ASPIRED study Patient Advisory Group, Edinburgh, UK
| | | | - Trudie Lobban
- ASPIRED study Patient Advisory Group, Edinburgh, UK
- Arrhythmia Alliance, Chipping Norton, UK
| |
Collapse
|
8
|
Choi YY, Choi JI, Kim YG, Min K, Roh SY, Shim J, Choi JS, Kim YH. Diagnostic usefulness of implantable loop recorder in patients with unexplained syncope or palpitation. INTERNATIONAL JOURNAL OF ARRHYTHMIA 2022. [DOI: 10.1186/s42444-022-00068-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Abstract
Background
In a substantial proportion of patients with syncope, the exact cause is not identified because of the difficulty to document electrocardiograms correlated with the events during a syncope episode. Thus, an implantable loop recorder (ILR) was introduced for diagnosing hidden arrhythmia; however, its clinical use remains limited. Therefore, we conducted a retrospective analysis to assess the diagnostic value of the ILR in patients with unexplained syncope or palpitations.
Methods
All patients who had undergone ILR implantation from May 2016 to January 2020, were studied retrospectively. We analyzed their electrocardiogram stored in the device.
Results
Among the 70 patients (mean age ± SD; 50.2 ± 20.3 years, 27 men) with unknown causes of syncope or palpitation, during two years follow-up, arrhythmia was detected in 26 patients (37.1%). Nineteen (73.1%) patients underwent permanent pacemaker implantation due to symptomatic bradycardia or atrioventricular block. All arrhythmias were detected within 6 days to 39 months after loop recorder implantation. Thirteen patients (50%) showed sick sinus syndrome (eight long pauses and five tachycardia-bradycardia syndromes). Eleven patients (42.3%) had paroxysmal atrioventricular block. Two patients who underwent permanent pacemaker implantation showed a positive tilt-table test. Three patients underwent radiofrequency catheter ablation for paroxysmal supraventricular tachycardia and atrial fibrillation. The mean duration for the detection of first sign (arrhythmia or palpitations) was 7.5 months, and the time from the detection of arrhythmia to ablation or device implantation was 3.4 months.
Conclusion
ILR monitoring detected a substantial number of significant bradycardias in patients with unexplained syncope and palpitations, suggesting that it is an effective diagnostic method that can shorten the time required to identify the cause of arrhythmias.
Collapse
|
9
|
Matsumoto K, Kodama Y, Ito S, Nakamura Y, Fujiwara R, Kajio K, Kasamatsu K, Murata E, Nakamura Y, Kawase Y. Clinical predictors of cardiac syncope in patients with unexplained syncope after the implantation of an insertable cardiac monitor. Heart Vessels 2022; 38:731-739. [PMID: 36443457 DOI: 10.1007/s00380-022-02212-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Accepted: 11/24/2022] [Indexed: 11/29/2022]
Abstract
Syncope prognosis is related to both its etiology and comorbidities, with cardiac syncope (CS) having higher risks for mortality and cardiovascular events than syncope of non-cardiac causes. Although a novel insertable cardiac monitor (ICM) is an effective diagnostic tool for unexplained syncope, decision regarding ICM implantation with a high pre-test likelihood of CS should contribute to economic cost reduction and avoidance of unnecessary complications. This study aimed to investigate clinical factors associated with CS after ICM implantation in patients with unexplained syncope. This retrospective observational study included 31 consecutive patients with ICM implantation for syncope between September 2016 and August 2021. The initial examinations for syncope included a detailed history, physical examination, blood tests, 12-lead electrocardiograms, and transthoracic echocardiography. Of the 31 patients, 13 (41.9%) experienced recurrent CS during follow-up (676 ± 469 days). Among several clinical factors, syncope-related minor injuries (p = 0.017) and higher brain natriuretic peptide (BNP; p = 0.043) levels were significantly associated with CS. Moreover, multivariable analysis showed that both syncope-related minor injuries (odds ratio, 11.2; 95% confidence interval, 1.4-88.4; p = 0.022) and BNP higher than 64.0 pg/mL (odds ratio, 7.0; 95% confidence interval, 1.1-44.2; p = 0.038) were independent predictors of CS after ICM implantation. In conclusion, a history of minor injury secondary to syncope and higher BNP levels were independent CS predictors in patients receiving ICM for syncope. These results emphasized the utility of ICM implantation early in the diagnostic journey of patients presenting with CS predictors requiring specific treatments.
Collapse
Affiliation(s)
- Kenji Matsumoto
- Department of Cardiology, Izumi City General Hospital, 4-5-1 Wake-Cho, Izumi, 594-0073, Japan.
| | - Yuka Kodama
- Department of Cardiology, Izumi City General Hospital, 4-5-1 Wake-Cho, Izumi, 594-0073, Japan
| | - Shinji Ito
- Department of Cardiology, Izumi City General Hospital, 4-5-1 Wake-Cho, Izumi, 594-0073, Japan
| | - Yuka Nakamura
- Department of Cardiology, Izumi City General Hospital, 4-5-1 Wake-Cho, Izumi, 594-0073, Japan
| | - Ryosuke Fujiwara
- Department of Cardiology, Izumi City General Hospital, 4-5-1 Wake-Cho, Izumi, 594-0073, Japan
| | - Keiko Kajio
- Department of Cardiology, Izumi City General Hospital, 4-5-1 Wake-Cho, Izumi, 594-0073, Japan
| | - Keiko Kasamatsu
- Department of Cardiology, Izumi City General Hospital, 4-5-1 Wake-Cho, Izumi, 594-0073, Japan
| | - Eriko Murata
- Department of Cardiology, Izumi City General Hospital, 4-5-1 Wake-Cho, Izumi, 594-0073, Japan
| | - Yasuhiro Nakamura
- Department of Cardiology, Izumi City General Hospital, 4-5-1 Wake-Cho, Izumi, 594-0073, Japan
| | - Yoshio Kawase
- Department of Cardiology, Izumi City General Hospital, 4-5-1 Wake-Cho, Izumi, 594-0073, Japan
| |
Collapse
|
10
|
Vidya P, Ananthakrishnan R, Mukherjee R, Sharma P, Joshi S, Mohanty S. Implantable loop recorder in unexplained palpitations or syncope: A randomised study among young patients with structurally normal heart. Med J Armed Forces India 2022; 78:437-442. [PMID: 36267503 PMCID: PMC9577264 DOI: 10.1016/j.mjafi.2020.12.016] [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: 07/20/2020] [Accepted: 12/21/2020] [Indexed: 10/21/2022] Open
Abstract
Background The utility of an implantable loop recorder (ILR) in the evaluation of unexplained syncope or palpitations in young patients in the absence of structural heart disease or ventricular dysfunction is limited. To compare the diagnostic yield of ILR with conventional extended Holter evaluation in the detection of arrhythmias among young patients with a structurally normal heart presenting with unexplained palpitations or syncope. Methods Open-label randomised control trial was conducted in a tertiary cardiac care centre among young patients with recurrent unexplained palpitations (≥3 episodes/year) or syncope (≥2 episodes) with normal electrocardiogram and echocardiography, after excluding non-cardiac causes. Patients were block randomised to either ILR implantation or conventional extended Holter monitoring. Results Fourteen patients in the ILR group and 16 patients in the conventional group completed the study. The mean age of the patients was 31.9 ± 5.5 and 31.2 ± 5.4 years. Males constituted 78.5% and 75% in the two groups, respectively. Diagnosis was established in 10 (71.5%) patients in the ILR group as compared to only 3 (18.7%) in the conventional group (p = 0.01), with an RR of 0.26 (95% CI 0.089-0.76, p = 0.01). The arrhythmias diagnosed with ILR were narrow complex tachycardia (30%), atrial fibrillation (20%), VPCs (20%), severe bradycardia with asystole due to sinus arrest (10%), VPCs with bigeminy (10%), and ventricular tachycardia (10%). Conclusion In young patients with unexplained syncope or palpitations, ILR has a higher diagnostic yield in the accurate detection of arrhythmia compared with conventional Holter strategy, resulting in better management.
Collapse
Affiliation(s)
- P.L. Vidya
- Senior Resident (Cardiology), Army Institute of Cardiothoracic Sciences (AICTS), Pune, 40, India
| | - R. Ananthakrishnan
- Senior Advisor, (Medicine and Cardiology), Army Institute of Cardiothoracic Sciences (AICTS), Pune, 40, India
| | - Reema Mukherjee
- Classified Specialist, Department of Community Medicine, Armed Forces Medical College, Pune, India
| | - Prafull Sharma
- Classified Specialist (Cardiology), Army Hospital (Research and Referral), New Delhi, India
| | - Sudhir Joshi
- Senior Advisor (Medicine and Cardiology), INHS Kalyani, Vizag, India
| | - Soumitra Mohanty
- Classified Specialist (Medicine and Cardiology), INHS Asvini, Mumbai, India
| |
Collapse
|
11
|
Willy K, Ellermann C, Syring S, Rath B, Reinke F, Willy D, Wolfes J, Wegner FK, Eckardt L, Köbe J, Morina N. Psychological Aspects of Syncopes and Possible Association with Recurrency—The Role of Implantable Loop Recorders. J Pers Med 2022; 12:jpm12081219. [PMID: 35893313 PMCID: PMC9332765 DOI: 10.3390/jpm12081219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Revised: 07/25/2022] [Accepted: 07/26/2022] [Indexed: 11/16/2022] Open
Abstract
Syncopes are a very common phenomenon and have a high recurrence rate. The differentiation between the psychogenic and physical, especially of arrhythmic origin, remains difficult. In many cases, an implantable loop recorder is used for the detection of possible arrhythmias, leading to syncopes. Yet, the existing literature suggests that psychological factors may play a significant role in recurrent syncopes. We aimed at analyzing the potential role of several psychological factors on the recurrence of arrhythmic or non-arrhythmic syncopes. Methods and results: A total of 119 patients, who had received an implantable loop recorder for recurrent syncopes at our center between 01/2018 and 12/2021, participated in this retrospective cohort study. Anxiety, depression and quality of life were assessed using extensively validated questionnaires (GAD-7, PHQ-9 and SF-12). The mean follow-up after loop recorder implantation was 710 ± 430 days and 50% of patients were female. The mean patient age was 54.8 ± 18.6 years. Most patients had no evidence of structural heart disease (84%), and normal LV function (92%). A statistical analysis revealed that the presence of structural heart disease was the strongest predictor for arrhythmic syncope during follow-up. In patients with non-arrhythmic syncopes, we found significantly higher levels of anxiety (GAD-7 score: 2.5 ± 2.6 vs. 4.8 ± 4.3) and depression (PHQ-9 score: 3.9 ± 3.6 vs. 6.8 ± 5.1), and a lower quality of life (SF-12 score: 33.7 ± 6.4 vs. 29.6 ± 7.8). Discussion: We identified factors as contributors to a better identification of patients at risk for arrhythmic as well as non-arrhythmic syncopes. Especially anxious or depressive symptoms may hinted at non-arrhythmic causes of syncope. However, the study was limited by its retrospective design and low patient number. Further trials should likewise combine the diagnostic yield of loop recorders with psychometric evaluations before implantation and combine it with additional diagnostic measures, such as video monitoring, to further examine the role of psychological factors in the pathomechanism and treatment of syncope.
Collapse
Affiliation(s)
- Kevin Willy
- Department for Cardiology II: Electrophysiology, University Hospital Münster, Albert-Schweitzer-Campus 1 Gebäude A1, 48149 Münster, Germany; (C.E.); (S.S.); (B.R.); (F.R.); (J.W.); (F.K.W.); (L.E.); (J.K.)
- Department of Psychology, University of Münster, 48419 Münster, Germany;
- Correspondence: ; Tel.: +49-251-83-44949; Fax: +49-251-83-52980
| | - Christian Ellermann
- Department for Cardiology II: Electrophysiology, University Hospital Münster, Albert-Schweitzer-Campus 1 Gebäude A1, 48149 Münster, Germany; (C.E.); (S.S.); (B.R.); (F.R.); (J.W.); (F.K.W.); (L.E.); (J.K.)
| | - Sarah Syring
- Department for Cardiology II: Electrophysiology, University Hospital Münster, Albert-Schweitzer-Campus 1 Gebäude A1, 48149 Münster, Germany; (C.E.); (S.S.); (B.R.); (F.R.); (J.W.); (F.K.W.); (L.E.); (J.K.)
| | - Benjamin Rath
- Department for Cardiology II: Electrophysiology, University Hospital Münster, Albert-Schweitzer-Campus 1 Gebäude A1, 48149 Münster, Germany; (C.E.); (S.S.); (B.R.); (F.R.); (J.W.); (F.K.W.); (L.E.); (J.K.)
| | - Florian Reinke
- Department for Cardiology II: Electrophysiology, University Hospital Münster, Albert-Schweitzer-Campus 1 Gebäude A1, 48149 Münster, Germany; (C.E.); (S.S.); (B.R.); (F.R.); (J.W.); (F.K.W.); (L.E.); (J.K.)
| | - Daniela Willy
- Department of Obstetrics and Gynecology, University Hospital Münster, 48419 Münster, Germany;
| | - Julian Wolfes
- Department for Cardiology II: Electrophysiology, University Hospital Münster, Albert-Schweitzer-Campus 1 Gebäude A1, 48149 Münster, Germany; (C.E.); (S.S.); (B.R.); (F.R.); (J.W.); (F.K.W.); (L.E.); (J.K.)
| | - Felix K. Wegner
- Department for Cardiology II: Electrophysiology, University Hospital Münster, Albert-Schweitzer-Campus 1 Gebäude A1, 48149 Münster, Germany; (C.E.); (S.S.); (B.R.); (F.R.); (J.W.); (F.K.W.); (L.E.); (J.K.)
| | - Lars Eckardt
- Department for Cardiology II: Electrophysiology, University Hospital Münster, Albert-Schweitzer-Campus 1 Gebäude A1, 48149 Münster, Germany; (C.E.); (S.S.); (B.R.); (F.R.); (J.W.); (F.K.W.); (L.E.); (J.K.)
| | - Julia Köbe
- Department for Cardiology II: Electrophysiology, University Hospital Münster, Albert-Schweitzer-Campus 1 Gebäude A1, 48149 Münster, Germany; (C.E.); (S.S.); (B.R.); (F.R.); (J.W.); (F.K.W.); (L.E.); (J.K.)
| | - Nexhmedin Morina
- Department of Psychology, University of Münster, 48419 Münster, Germany;
| |
Collapse
|
12
|
2021 ESC Guidelines on cardiac pacing and cardiac resynchronization therapy. Translation of the document prepared by the Czech Society of Cardiology. COR ET VASA 2022. [DOI: 10.33678/cor.2022.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
13
|
Miyazaki Y, Yamagata K, Ishibashi K, Inoue Y, Miyamoto K, Nagase S, Aiba T, Kusano K. Paroxysmal atrial fibrillation as a predictor of pacemaker implantation in patients with unexplained syncope. J Cardiol 2022; 80:28-33. [DOI: 10.1016/j.jjcc.2022.02.017] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Revised: 01/17/2022] [Accepted: 02/03/2022] [Indexed: 10/18/2022]
|
14
|
Glikson M, Nielsen JC, Kronborg MB, Michowitz Y, Auricchio A, Barbash IM, Barrabés JA, Boriani G, Braunschweig F, Brignole M, Burri H, Coats AJ, Deharo JC, Delgado V, Diller GP, Israel CW, Keren A, Knops RE, Kotecha D, Leclercq C, Merkely B, Starck C, Thylén I, Tolosana JM. Grupo de trabajo sobre estimulación cardiaca y terapia de resincronización cardiaca de la Sociedad Europea de Cardiología (ESC). Rev Esp Cardiol 2022. [DOI: 10.1016/j.recesp.2021.10.025] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
|
15
|
Glikson M, Nielsen JC, Kronborg MB, Michowitz Y, Auricchio A, Barbash IM, Barrabés JA, Boriani G, Braunschweig F, Brignole M, Burri H, Coats AJS, Deharo JC, Delgado V, Diller GP, Israel CW, Keren A, Knops RE, Kotecha D, Leclercq C, Merkely B, Starck C, Thylén I, Tolosana JM, Leyva F, Linde C, Abdelhamid M, Aboyans V, Arbelo E, Asteggiano R, Barón-Esquivias G, Bauersachs J, Biffi M, Birgersdotter-Green U, Bongiorni MG, Borger MA, Čelutkienė J, Cikes M, Daubert JC, Drossart I, Ellenbogen K, Elliott PM, Fabritz L, Falk V, Fauchier L, Fernández-Avilés F, Foldager D, Gadler F, De Vinuesa PGG, Gorenek B, Guerra JM, Hermann Haugaa K, Hendriks J, Kahan T, Katus HA, Konradi A, Koskinas KC, Law H, Lewis BS, Linker NJ, Løchen ML, Lumens J, Mascherbauer J, Mullens W, Nagy KV, Prescott E, Raatikainen P, Rakisheva A, Reichlin T, Ricci RP, Shlyakhto E, Sitges M, Sousa-Uva M, Sutton R, Suwalski P, Svendsen JH, Touyz RM, Van Gelder IC, Vernooy K, Waltenberger J, Whinnett Z, Witte KK. 2021 ESC Guidelines on cardiac pacing and cardiac resynchronization therapy. Europace 2022; 24:71-164. [PMID: 34455427 DOI: 10.1093/europace/euab232] [Citation(s) in RCA: 140] [Impact Index Per Article: 70.0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
|
16
|
Applicability of a Novel Wearable Wireless Electrocardiogram Monitoring Device (Spyder) for Arrhythmia Detection in Patients with Suspected Cardiac Arrhythmias. Cardiol Res Pract 2021; 2021:8496351. [PMID: 34868676 PMCID: PMC8642027 DOI: 10.1155/2021/8496351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/22/2021] [Revised: 10/22/2021] [Accepted: 11/09/2021] [Indexed: 12/02/2022] Open
Abstract
Introduction In clinical practice, many cardiovascular symptoms can be caused by arrhythmias that are not detected by electrocardiography (ECG) or 24–48 h Holter ECG monitoring. Aims To describe the efficacy and applicability of a new device (Spyder) in detecting cardiac arrhythmias with midterm ECG monitoring. Methods A descriptive, prospective study was performed on 26 consecutive patients who underwent midterm ECG monitoring with the novel ECG patch device (Spyder). The study was conducted over a 6-month period from August 2020 to February 2021. Results Twenty-six patients (mean age, 57.8 ± 12.5 years; men, 77%) wearing a Spyder wireless ECG-monitoring device were recruited. The mean wearing time was 84 hours. The main indications for using the device were detection of recurrent atrial fibrillation after radiofrequency ablation (30.7%) and screening for atrial fibrillation after cryptogenic stroke (23.1%). All ECG monitor recordings obtained during the study period were of good quality. The device detected 12 episodes of atrial fibrillation in eight patients, one episode of ventricular tachycardia, one supraventricular tachycardia event, one case of paroxysmal third-degree atrioventricular block, and five cases of frequent premature ventricular contraction. The time to detection of the first episodes of atrial fibrillation and ventricular and supraventricular tachycardia was 28.8 and 47 hours, respectively. Conclusions The new wearable wireless ECG-monitoring device (Spyder) is a feasible and effective method for the detection of cardiac arrhythmias.
Collapse
|
17
|
Unexplained Syncope: The Importance of the Electrophysiology Study. HEARTS 2021. [DOI: 10.3390/hearts2040038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Syncope of cardiac origin may be associated with an increased risk of sudden cardiac death if not treated in a timely and appropriate manner. The diagnostic approach of syncope imposes a significant economic burden on society. The investigation and elucidation of the pathogenetic mechanism of syncope are of great clinical importance, as both prognosis and appropriate therapeutic approaches depend on these factors. The responsible mechanism of presyncope or syncope can only be revealed through the patient history, baseline clinical examination and electrocardiogram. The percentage of patients who are diagnosed with these tests alone exceeds 50%. In patients with a history of organic or acquired heart disease or/and the presence of abnormal findings on the electrocardiogram, a further diagnostic electrophysiology inclusive approach should be followed to exclude life threatening arrhythmiological mechanism. However, if the patient does not suffer from underlying heart disease and does not show abnormal electrocardiographic findings in the electrocardiogram, then the probability in the electrophysiology study to find a responsible cause is small but not absent. The role of a two-step electrophysiology study inclusive risk stratification approach for the effective management of the former is thoroughly discussed in this review.
Collapse
|
18
|
Glikson M, Nielsen JC, Kronborg MB, Michowitz Y, Auricchio A, Barbash IM, Barrabés JA, Boriani G, Braunschweig F, Brignole M, Burri H, Coats AJS, Deharo JC, Delgado V, Diller GP, Israel CW, Keren A, Knops RE, Kotecha D, Leclercq C, Merkely B, Starck C, Thylén I, Tolosana JM. 2021 ESC Guidelines on cardiac pacing and cardiac resynchronization therapy. Eur Heart J 2021; 42:3427-3520. [PMID: 34455430 DOI: 10.1093/eurheartj/ehab364] [Citation(s) in RCA: 865] [Impact Index Per Article: 288.3] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
|
19
|
Altinsoy M, Sutton R, Kohno R, Sakaguchi S, Mears RK, Benditt DG. Ambulatory ECG monitoring for syncope and collapse in United States, Europe, and Japan: The patients' viewpoint. J Arrhythm 2021; 37:1023-1030. [PMID: 34386128 PMCID: PMC8339081 DOI: 10.1002/joa3.12560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Revised: 04/13/2021] [Accepted: 05/04/2021] [Indexed: 12/01/2022] Open
Abstract
BACKGROUND Practice guidelines provide clinicians direction for the selection of ambulatory ECG (AECG) monitors in the evaluation of syncope/collapse. However, whether patients' understand differences among AECG systems is unknown. METHODS AND RESULTS A survey was conducted of USA (n = 99), United Kingdom (UK)/Germany (D) (n = 75) and Japan (n = 40) syncope/collapse patients who underwent diagnostic AECG monitoring. Responses were quantitated using a Likert-like 7-point scale (mean ± SD) or percent of patients indicating a Top 2 box (T2B) for a particular AECG attribute. Patient ages and diagnosed etiologies of syncope/collapse were similar across geographies. Patients were queried on AECG attributes including the ability to detect arrhythmic/cardiac causes of collapse, instructions received, ease of use, and cost. Patient perception of the diagnostic capabilities and ease of use did not differ significantly among the AECG technologies; however, USA patients had a more favorable overall view of ICM/ILRs (T2B: 42.4%) than did UK/D (T2B: 28%) or Japan (T2B: 17.5%) patients. Similarly, US patient rankings for education received regarding device choice and operation tended to be higher than UK/D or Japan patients; nevertheless, at their best, the Likert scores were low (approximately 4.7-6.0) suggesting need for education improvement. Finally, both US and UK/D patients were similarly concerned with ICM costs (T2B, 31% vs 20% for Japan). CONCLUSIONS Patients across several geographies have a similar but imperfect understanding of AECG technologies. Given more detailed education the patient is likely to be a more effective partner with the clinician in establishing a potential symptom-arrhythmia correlation.
Collapse
Affiliation(s)
- Meltem Altinsoy
- Cardiac Arrhythmia CenterCardiovascular DivisionUniversity of Minnesota Medical SchoolMinneapolisMNUSA
- Cardiology ResidencyTurgut Ozal UniversitySchool of MedicineAnkaraTurkey
| | - Richard Sutton
- Cardiology DepartmentNational Heart and Lung InstituteImperial CollegeHammersmith HospitalLondonUK
| | - Ritsuko Kohno
- Cardiac Arrhythmia CenterCardiovascular DivisionUniversity of Minnesota Medical SchoolMinneapolisMNUSA
| | - Scott Sakaguchi
- Cardiac Arrhythmia CenterCardiovascular DivisionUniversity of Minnesota Medical SchoolMinneapolisMNUSA
| | | | - David G. Benditt
- Cardiac Arrhythmia CenterCardiovascular DivisionUniversity of Minnesota Medical SchoolMinneapolisMNUSA
| |
Collapse
|
20
|
Aminorroaya A, Tavolinejad H, Sadeghian S, Jalali A, Alaeddini F, Emkanjoo Z, Mollazadeh R, Bozorgi A, Oraii S, Kiarsi M, Shahabi J, Akbarzadeh MA, Rahimi B, Joharimoghadam A, Mohsenizade A, Mohammadi R, Oraii A, Ariannejad H, Apakuppakul S, Ngarmukos T, Tajdini M. Comparison of Outcomes with Midodrine and Fludrocortisone for Objective Recurrence in Treating Syncope (COMFORTS trial): Rationale and design for a multi-center randomized controlled trial. Am Heart J 2021; 237:5-12. [PMID: 33689731 DOI: 10.1016/j.ahj.2021.03.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Accepted: 03/02/2021] [Indexed: 12/14/2022]
Abstract
BACKGROUND The cornerstone of the treatment of vasovagal syncope (VVS) is lifestyle modifications; however, some patients incur life-disturbing attacks despite compliance with these treatments which underscores the importance of pharmacological interventions. METHODS In this open-label multi-center randomized controlled trial, we are going to randomize 1375 patients with VVS who had ≥2 syncopal episodes in the last year into three parallel arms with a 2:2:1 ratio to receive midodrine, fludrocortisone, or no medication. All patients will be recommended to drink 2 to 3 liters of fluids per day, consume 10 grams of NaCl per day, and practice counter-pressure maneuvers. In medication arms, patients will start on 5 mg of midodrine TDS or 0.05 mg of fludrocortisone BD. After one week the dosage will be up-titrated to midodrine 30 mg/day and fludrocortisone 0.2 mg/day. Patient tolerance will be the principal guide to dosage adjustments. We will follow-up the patients on 3, 6, 9, and 12 months after randomization. The primary outcome is the time to first syncopal episode. Secondary outcomes include the recurrence rate of VVS, time interval between first and second episodes, changes in quality of life (QoL), and major and minor adverse drug reactions. QoL will be examined by the 36-Item Short Form Survey questionnaire at enrollment and 12 months after randomization. CONCLUSION The COMFORTS trial is the first study that aims to make a head-to-head comparison between midodrine and fludrocortisone, against a background of lifestyle modifications for preventing recurrences of VVS and improving QoL in patients with VVS.
Collapse
|
21
|
Bosch R. [Autonomic nervous system and reflex syncope]. Herzschrittmacherther Elektrophysiol 2021; 32:330-334. [PMID: 34189616 DOI: 10.1007/s00399-021-00775-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Accepted: 05/18/2021] [Indexed: 11/24/2022]
Abstract
This review discusses important aspects of pathophysiology, diagnosis and therapy of reflex syncope. The autonomic nervous system plays a crucial role in the origin of this frequently observed form of syncope. In most cases, reflex syncopes occur under specific circumstances. Thus, a detailed history is essential. Besides a physical exam und a normal 12-lead ECG, dedicated tests like tilt-table-testing, carotid massage and the implantation of a loop recorder often assist in making the correct diagnosis. The basis of therapy for all patients is reassurance about the benign course of the disease as well as education about adequate measures. Pharmacotherapy is reserved to a minority of patients. In older patients with repeat or severe syncopes and documented asystoles, pacemaker therapy is a valuable option.
Collapse
Affiliation(s)
- Ralph Bosch
- Cardio Centrum Ludwigsburg-Bietigheim (CCLB), Asperger Str. 48, 71634, Ludwigsburg, Deutschland.
| |
Collapse
|
22
|
Nadkarni A, Devgun J, Jamal SM, Bardales D, Mease J, Matto F, Okabe T, Daoud EG, Afzal MR. Subcutaneous cardiac rhythm monitors: state of the art review. Expert Rev Med Devices 2021; 18:587-596. [PMID: 34057872 DOI: 10.1080/17434440.2021.1935873] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Introduction: Subcutaneous cardiac rhythm monitors (SCRMs) provide continuous ambulatory electrocardiographic monitoring for surveillance of known and identification of infrequent arrhythmias. SCRMs have proven to be helpful for the evaluation of unexplained symptoms and correlation with intermittent cardiac arrhythmias. Successful functioning of SCRM is dependent on accurate detection and successful transmission of the data to the device clinic. As the use of SCRM is steadily increasing, the amount of data that requires timely adjudication requires substantial resources. Newer algorithms for accurate detection and modified workflow systems have been proposed by physicians and the manufacturers to circumvent the issue of data deluge.Areas covered: This paper provides an overview of the various aspects of ambulatory rhythm monitoring with SCRMs including indications, implantation techniques, programming strategies, troubleshooting for issue of false positive and intermittent connectivity and strategies to circumvent data deluge.Expert opinion: SCRM is an invaluable technology for prolonged rhythm monitoring. The clinical benefits from SCRM hinge on accurate arrhythmia detection, reliable transmission of the data and timely adjudication for possible intervention. Further improvement in SCRM technology is needed to minimize false-positive detection, improve connectivity to the central web-based server, and devise strategies to minimize data deluge.
Collapse
Affiliation(s)
- Anish Nadkarni
- Division of Cardiovascular Medicine, Wexner Medical Center at the Ohio State University Medical Center, Columbus, OH, USA
| | - Jasneet Devgun
- Division of Internal Medicine, Henry Ford Hospital, Detroit, MI, USA
| | - Shakeel M Jamal
- Division of Internal Medicine, Central Michigan University, Saginaw, MI, USA
| | - Delores Bardales
- Department of cardiology , CardioVascular Specialists, Lancaster, OH, USA
| | - Julie Mease
- Division of Cardiovascular Medicine, Wexner Medical Center at the Ohio State University Medical Center, Columbus, OH, USA
| | - Faisal Matto
- Division of Cardiovascular Medicine, Wexner Medical Center at the Ohio State University Medical Center, Columbus, OH, USA
| | - Toshimasa Okabe
- Division of Cardiovascular Medicine, Wexner Medical Center at the Ohio State University Medical Center, Columbus, OH, USA
| | - Emile G Daoud
- Division of Cardiovascular Medicine, Wexner Medical Center at the Ohio State University Medical Center, Columbus, OH, USA
| | - Muhammad R Afzal
- Division of Cardiovascular Medicine, Wexner Medical Center at the Ohio State University Medical Center, Columbus, OH, USA
| |
Collapse
|
23
|
Falsing MM, Brainin P, Andersen DM, Larroudé CE, Lindhardt TB, Ravnkilde K, Modin D, Karsum EH, Gislason G, Biering-Sørensen T. Sex differences in echocardiographic predictors of bradycardia detected by implantable loop recorder in patients with syncope and palpitations. Echocardiography 2021; 38:1186-1194. [PMID: 34037991 DOI: 10.1111/echo.15085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Revised: 04/21/2021] [Accepted: 05/03/2021] [Indexed: 11/28/2022] Open
Abstract
OBJECTIVE Our aim was to investigate whether echocardiography may aid in identifying patients, specifically men, at risk of bradycardia as detected by implantable loop recorders (ILR) in patients evaluated for syncope and palpitations. METHODS We included ambulatory patients undergoing ILR implantation for syncope (84%), presyncope (9%), and palpitations (8%). Echocardiographic examination was performed prior to implantation (2.9 months [IQR 1.0-6.0 months]). Echocardiograms were analyzed for conventional and speckle tracking parameters. We examined time to first event of bradycardia, defined as (a) heart rate <30 beats/min and (b) ≥4 beats, including sinus arrest, asystole, sinoatrial block, and second- and third-degree atrioventricular nodal block. We applied Cox proportional hazards models. RESULTS A total of 285 patients we enrolled, and during a median time of 2.7 years [IQR 1.0, 3.3 years] of continuous heart rhythm monitoring, 84 (29%) had bradycardia detected by ILR. Patients with bradycardia were older (61 ± 19 years vs 55 ± 18 years, P = .01) and more frequently men (62% vs 44%, P = .01). Sex modified the association between echocardiographic parameters and bradycardia (P interaction <0.05 for all), such that left ventricular LV mass index (HR: 1.02 per 1g/m2 increase [1.01-1.04], P < .001), LV ejection fraction (HR: 1.04 per 1% decrease [1.01-1.08], P = .02), and global longitudinal strain (HR: 1.09 per 1% decrease [1.01-1.19], P = .03) were associated with bradycardia in men but not women (P > .05 for all in female). After adjusting for baseline clinical characteristics, medical therapy, and loop indication, the abovementioned parameters remained significantly associated with incident bradycardia in men. CONCLUSION Echocardiographic parameters of LV structure and function may potentially be more useful for predicting bradycardia in men than women, among patients undergoing ILR implantation for syncope, presyncope, and palpations.
Collapse
Affiliation(s)
- Mathilde Musoni Falsing
- Cardiovascular Non-Invasive Imaging Research Laboratory, Department of Cardiology, Herlev & Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark
| | - Philip Brainin
- Cardiovascular Non-Invasive Imaging Research Laboratory, Department of Cardiology, Herlev & Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark.,Department of Cardiology, Federal University of Acre, Acre, Brazil
| | - Ditte Madsen Andersen
- Cardiovascular Non-Invasive Imaging Research Laboratory, Department of Cardiology, Herlev & Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark
| | - Charlotte Ellen Larroudé
- Cardiovascular Non-Invasive Imaging Research Laboratory, Department of Cardiology, Herlev & Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark
| | - Tommi Bo Lindhardt
- Cardiovascular Non-Invasive Imaging Research Laboratory, Department of Cardiology, Herlev & Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark
| | - Kirstine Ravnkilde
- Cardiovascular Non-Invasive Imaging Research Laboratory, Department of Cardiology, Herlev & Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark
| | - Daniel Modin
- Cardiovascular Non-Invasive Imaging Research Laboratory, Department of Cardiology, Herlev & Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark
| | - Emil Høegholm Karsum
- Cardiovascular Non-Invasive Imaging Research Laboratory, Department of Cardiology, Herlev & Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark
| | - Gunnar Gislason
- Cardiovascular Non-Invasive Imaging Research Laboratory, Department of Cardiology, Herlev & Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark
| | - Tor Biering-Sørensen
- Cardiovascular Non-Invasive Imaging Research Laboratory, Department of Cardiology, Herlev & Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark
| |
Collapse
|
24
|
Onuki T, Shoji M, Sugiyama H, Arai S, Yoshikawa K, Mase H, Kurata M, Kikuchi M, Wakatsuki D, Asano T, Suzuki H, Tanno K, Kobayashi Y, Shinke T. Clinical predictors for bradycardia and supraventricular tachycardia necessitating therapy in patients with unexplained syncope monitored by insertable cardiac monitor. Clin Cardiol 2021; 44:683-691. [PMID: 33724499 PMCID: PMC8119800 DOI: 10.1002/clc.23594] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Revised: 03/06/2021] [Accepted: 03/08/2021] [Indexed: 11/17/2022] Open
Abstract
Background Insertable cardiac monitors (ICMs) improve diagnostic yield in patients with unexplained syncope. The most of cardiac syncope is arrhythmic causes include paroxysmal bradycardia and supraventricular tachycardia (SVT) in patients with unexplained syncope receiving ICM. Predictors for bradycardia and SVT that necessitate therapy in patients with unexplained syncope are not well known. Hypothesis This study aimed to investigate predictors of bradycardia and SVT necessitating therapy in patients with unexplained syncope receiving ICMs. Methods We retrospectively reviewed medical records of consecutive patients who received ICMs to monitor unexplained syncope. We performed Cox's stepwise logistic regression analysis to identify significant independent predictors for bradycardia and SVT. Results One hundred thirty‐two patients received ICMs to monitor unexplained syncope. During the 17‐month follow‐up period, 19 patients (14%) needed pacemaker therapy for bradycardia; 8 patients (6%) received catheter ablation for SVT. The total estimated diagnostic rates were 34% and 48% at 1 and 2 years, respectively. Stepwise logistic regression analysis indicated that syncope during effort (odds ratio [OR] = 3.41; 95% confidence interval [CI], 1.21 to 9.6; p = .02) was an independent predictor for bradycardia. Palpitation before syncope (OR = 9.46; 95% CI, 1.78 to 50.10; p = .008) and history of atrial fibrillation (OR = 10.1; 95% CI, 1.96 to 52.45; p = .006) were identified as significant independent predictors for SVT. Conclusion Syncope during effort, and palpitations or history of atrial fibrillation were independent predictors for bradycardia and for SVT. ICMs are useful devices for diagnosing unexplained syncope.
Collapse
Affiliation(s)
- Tatsuya Onuki
- Division of Cardiology, Department of Medicine, Showa University, Tokyo, Japan
| | - Makoto Shoji
- Division of Cardiology, Department of Medicine, Showa University, Tokyo, Japan
| | - Hiroto Sugiyama
- Division of Cardiology, Department of Medicine, Showa University, Tokyo, Japan
| | - Shuhei Arai
- Division of Cardiology, Department of Medicine, Showa University, Tokyo, Japan
| | - Kosuke Yoshikawa
- Division of Cardiology, Department of Medicine, Showa University, Tokyo, Japan
| | - Hiroshi Mase
- Division of Cardiology, Department of Medicine, Showa University Fujigaoka Hospital, Yokohama, Japan
| | - Masaaki Kurata
- Division of Cardiology, Department of Medicine, Showa University Fujigaoka Hospital, Yokohama, Japan
| | - Miwa Kikuchi
- Cardiovascular Center, Showa University Koto Toyosu Hospital, Tokyo, Japan
| | - Daisuke Wakatsuki
- Division of Cardiology, Department of Medicine, Showa University Fujigaoka Hospital, Yokohama, Japan
| | - Taku Asano
- Division of Cardiology, Department of Medicine, Showa University Fujigaoka Hospital, Yokohama, Japan
| | - Hiroshi Suzuki
- Division of Cardiology, Department of Medicine, Showa University Fujigaoka Hospital, Yokohama, Japan
| | - Kaoru Tanno
- Cardiovascular Center, Showa University Koto Toyosu Hospital, Tokyo, Japan
| | - Youichi Kobayashi
- Division of Cardiology, Department of Medicine, Showa University, Tokyo, Japan
| | - Toshiro Shinke
- Division of Cardiology, Department of Medicine, Showa University, Tokyo, Japan
| |
Collapse
|
25
|
Sutton BS, Bermingham SL, Diamantopoulos A, Rosemas SC, Tsintzos SI, Xia Y, Reynolds MR. Economic value of insertable cardiac monitors in unexplained syncope in the United States. Open Heart 2021; 8:e001263. [PMID: 33622962 PMCID: PMC7907887 DOI: 10.1136/openhrt-2020-001263] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Revised: 09/17/2020] [Accepted: 01/31/2021] [Indexed: 11/17/2022] Open
Abstract
INTRODUCTION Early use of insertable cardiac monitor (ICM) is recommended for patients with unexplained syncope following initial clinical workup, due to its superior ability to establish symptom-rhythm correlation compared with conventional testing (CONV). However, ICMs incur higher upfront costs, and the impact of additional diagnoses and resulting treatment on downstream costs and outcomes is unclear. We aimed to evaluate the cost-effectiveness of ICM compared with CONV for the diagnosis of arrhythmia in patients with unexplained syncope, from a US payer perspective. METHODS A Markov model was developed to estimate lifetime costs and benefits of arrhythmia diagnosis with ICM versus CONV, considering all related diagnostic and arrhythmia-related treatment costs and consequences. Cohort characteristics and costs were informed by original claims database analyses. Risks of mortality, syncopal recurrence, injury due to syncope and quality of life consequences from syncopal events were identified from the literature. RESULTS ICM was less costly and more effective than CONV. Most of the observed US$4532 cost savings were attributed to reduced downstream diagnostic testing. For every 1000 patients, ICM was projected to yield an additional 253 arrhythmia diagnoses and lead to treatment in an additional 168 patients. The ICM strategy resulted in overall improved outcomes (0.30 quality-adjusted life years gained), due to a reduction in syncope recurrence and injury resulting from arrhythmia treatment. The results were robust to changes in the base case parameters but sensitive to the model time horizon, underlying probability of syncope recurrence and prevalence of arrhythmias. CONCLUSIONS Our model projected that early ICM for the diagnosis of unexplained syncope reduced long-term costs, and led to an improvement in overall clinical outcomes by shortening time to arrhythmia treatment. The cost of ICM was outweighed by savings arising from fewer downstream diagnostic episodes, and the increased cost of treatment was counterbalanced by fewer syncope-related event costs.
Collapse
Affiliation(s)
| | | | | | | | - Stelios I Tsintzos
- Health Economics and Reimbursement, Medtronic Europe SA, Tolochenaz, Vaud, Switzerland
| | - Ying Xia
- Medtronic Inc, Minneapolis, Minnesota, USA
| | - Matthew R Reynolds
- Cardiovascular Medicine, Baim Institute for Clinical Research, Boston, Massachusetts, USA
| |
Collapse
|
26
|
Smith A, Perdue M, Vojnika J, Frisch DR, Pavri BB. The diagnostic yield of implantable loop recorders stratified by indication: "real-world" use in a large academic hospital. J Interv Card Electrophysiol 2020; 61:303-311. [PMID: 32621215 DOI: 10.1007/s10840-020-00815-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Accepted: 06/29/2020] [Indexed: 11/25/2022]
Abstract
PURPOSE To report on the clinical utility of implantable loop recorders (ILRs) in a large academic hospital setting over a 4-year period. METHODS Retrospective study (2013-2016) of patients receiving ILRs for any indication including syncope, cryptogenic stroke (CrS), atrial fibrillation (AF) burden, palpitations, ventricular arrhythmias (VA), and other. Remote checks, symptomatic transmissions, and in-person checks were reviewed. Time to diagnosis was documented. RESULTS A total of 263 patients (54% male, mean age 63 ± 15 years, mean follow-up 601 (range 9-1714) days) received ILRs for 324 indications; multiple indications were noted in 53/263 (20.2%) patients. ILR indications were 126 (39%) syncope, 81 (25%) CrS, 46 (14%) AF, 37 (11%) palpitations, 10 (3%) VA, and 24 (7%) other. Diagnostic yield for each indication was compared to the overall yield for all other indications. Three indications showed a significantly higher yield: AF (65% vs. 22%, p < 0.002), palpitations (60% vs. 24%, p < 0.001), and VA (70% vs. 28%, p < 0.004). For all other indications, there were no significant differences. Syncope had nearly half the diagnostic yield of previously published trials (28% vs. 43-56%). We observed a fourfold increase in ILR implant rate over the study duration. CONCLUSIONS In a "real-world" academic hospital setting, the diagnostic rate of ILRs was highest for AF, palpitations, and VA; however, these high yield indications comprised only 29% of all indications. The diagnostic yield for the commonest indication (syncope) was approximately half that reported in the previously published trials. With increasing implantation rates, additional studies are required to refine guideline-based indications for ILR implantation to improve diagnostic yield.
Collapse
Affiliation(s)
- Alexander Smith
- Department of Medicine, Thomas Jefferson University Hospital, 111 South 11th Street, Philadelphia, PA, USA
| | - Makenzie Perdue
- Department of Medicine, Thomas Jefferson University Hospital, 111 South 11th Street, Philadelphia, PA, USA
| | - Jetmir Vojnika
- Department of Medicine, Thomas Jefferson University Hospital, 111 South 11th Street, Philadelphia, PA, USA
| | - Daniel R Frisch
- Department of Medicine, Thomas Jefferson University Hospital, 111 South 11th Street, Philadelphia, PA, USA
| | - Behzad B Pavri
- Department of Medicine, Thomas Jefferson University Hospital, 111 South 11th Street, Philadelphia, PA, USA.
| |
Collapse
|
27
|
Akella K, Murtaza G, Della Rocca DG, Kodwani N, Gopinathannair R, Natale A, Lakkireddy D. Implantable loop recorders for cardiac dysrhythmia monitoring. Future Cardiol 2020; 16:725-733. [PMID: 32583678 DOI: 10.2217/fca-2020-0035] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Incorporation of technological advances in healthcare delivery has played a foundational role in development of modern healthcare. With the use of wireless transmission in conjunction with digitization of electrocardiography, continuous monitoring strategies have redefined our approach to dysrhythmia. These devices show promising results in evolving implantable loop recorder technology. In this review, we summarize the history of remote monitoring, indications for loop recorders, devices available, evidence for specific devices and anticipated studies.
Collapse
Affiliation(s)
- Krishna Akella
- Kansas City Heart Rhythm Institute (KCHRI), HCA Midwest Health Heart and Vascular Institute Overland Park, KS 66211, USA
| | - Ghulam Murtaza
- Kansas City Heart Rhythm Institute (KCHRI), HCA Midwest Health Heart and Vascular Institute Overland Park, KS 66211, USA
| | | | - Naresh Kodwani
- Overland Park Regional Medical Center, Department of Internal Medicine Overland Park, KS 66215, USA
| | - Rakesh Gopinathannair
- Kansas City Heart Rhythm Institute (KCHRI), HCA Midwest Health Heart and Vascular Institute Overland Park, KS 66211, USA
| | - Andrea Natale
- St. David's Medical Center, Texas Cardiac Arrhythmia Institute, Austin, TX 78705, USA
| | - Dhanunjaya Lakkireddy
- Kansas City Heart Rhythm Institute (KCHRI), HCA Midwest Health Heart and Vascular Institute Overland Park, KS 66211, USA
| |
Collapse
|
28
|
Lee SH, Kim TH, Oh YS, Oh S, Choi JI, Kim JB, Nah JC, Im SI, Kang KW, Han S, Kim JS. Usefulness of an Implantable Loop Recorder in Diagnosing Unexplained Syncope and Predictors for Pacemaker Implantation. J Korean Med Sci 2020; 35:e11. [PMID: 31920017 PMCID: PMC6955436 DOI: 10.3346/jkms.2020.35.e11] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Accepted: 11/06/2019] [Indexed: 11/20/2022] Open
Abstract
BACKGROUND An implantable loop recorder (ILR) is an effective tool for diagnosing unexplained syncope (US). We examined the diagnostic utility of an ILR in detecting arrhythmic causes of US and determining which clinical factors are associated with pacemaker (PM) implantation. METHODS This retrospective, multicenter, observational study was conducted from February 2006 to April 2018 at 11 hospitals in Korea. Eligible patients with recurrent US received an ILR to diagnose recurrent syncope and document arrhythmia. RESULTS A total of 173 US patients (mean age, 67.6 ± 16.5 years; 107 men [61.8%]) who received an ILR after a negative conventional workup were enrolled. During a mean follow-up of 9.4 ± 11.1 months, 52 patients (30.1%) had recurrent syncope, and syncope-correlated arrhythmia was confirmed in 34 patients (19.7%). The ILR analysis showed sinus node dysfunction in 24 patients (70.6%), supraventricular tachyarrhythmia in 4 (11.8%), ventricular arrhythmia in 4 (11.8%), and sudden atrioventricular block in 2 (5.9%). Overall, ILR detected significant arrhythmia in 99 patients (57.2%) irrespective of syncope. Among patients with clinically relevant arrhythmia detected by ILR, PM implantation was performed in 60 (34.7%), an intra-cardiac defibrillator in 5 (2.9%), and catheter ablation in 4 (2.3%). In a Cox regression analysis, history of paroxysmal atrial fibrillation (PAF) (hazard ratio [HR], 2.34; 95% confidence interval [CI], 1.33-4.12; P < 0.01) and any bundle branch block (BBB) (HR, 2.52; 95% CI, 1.09-5.85; P = 0.03) were significantly associated with PM implantation. CONCLUSION ILR is useful for detecting syncope-correlated arrhythmia in patients with US. The risk of PM is high in US patients with a history of PAF and any BBB.
Collapse
Affiliation(s)
- Sung Ho Lee
- Division of Cardiology, Department of Internal Medicine, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Tae Hoon Kim
- Division of Cardiology, Department of Internal Medicine, Severance Cardiovascular Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - Yong Seog Oh
- Division of Cardiology, Department of Internal Medicine, Seoul St. Mary's Hospital, The Catholic University of Korea, Seoul, Korea
| | - Seil Oh
- Division of Cardiology, Department of Internal Medicine, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea
| | - Jong Il Choi
- Division of Cardiology, Department of Internal Medicine, Korea University Anam Hospital, Korea University College of Medicine, Seoul, Korea
| | - Jin Bae Kim
- Division of Cardiology, Department of Internal Medicine, Kyung Hee University Hospital, Kyung Hee University College of Medicine, Seoul, Korea
| | - Jong Chun Nah
- Division of Cardiology, Department of Internal Medicine, Seoul Paik Hospital, Inje University College of Medicine, Seoul, Korea
| | - Sung Il Im
- Division of Cardiology, Department of Internal Medicine, Kosin University Gospel Hospital, Kosin University College of Medicine, Busan, Korea
| | - Ki Woon Kang
- Division of Cardiology, Department of Internal Medicine, Eulji University Hospital, Daejeon, Korea
| | - Seongwook Han
- Division of Cardiology, Department of Internal Medicine, Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Korea
| | - June Soo Kim
- Division of Cardiology, Department of Internal Medicine, Heart Vascular Stroke Institute, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
| |
Collapse
|
29
|
Rocha BML, Gomes RV, Cunha GJL, Silva BMV, Pocinho R, Morais R, Araújo I, Fonseca C. Diagnostic and therapeutic approach to cardioinhibitory reflex syncope: A complex and controversial issue. Rev Port Cardiol 2019; 38:661-673. [PMID: 31813672 DOI: 10.1016/j.repc.2018.11.007] [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] [Received: 04/02/2018] [Revised: 06/10/2018] [Accepted: 11/14/2018] [Indexed: 01/02/2023] Open
Abstract
Syncope is defined as a transient loss of consciousness due to global cerebral hypoperfusion and is one of the leading causes of emergency department admission. The initial approach should focus on excluding non-syncopal causes for loss of consciousness and risk stratification for cardiac cause, in order to ensure an appropriate etiological investigation and therapeutic approach. Vasovagal syncope (VVS), the most common type of syncope, should be assumed once other causes are excluded. Pathophysiologically, the vasovagal reflex is the result of a paradoxical autonomic response, leading to hypotension and/or bradycardia. VVS has not been shown to affect mortality, but morbidity may be considerable in those with recurrent syncopal episodes. The management of VVS includes both non-pharmacological and pharmacological measures that act on various levels of the reflex arc that triggers the syncopal episode. However, most are of uncertain benefit given the scarcity of high-quality supporting evidence. Pacemaker therapy may be considered in recurrent refractory cardioinhibitory reflex syncope, for which it is currently considered a robust intervention, as noted in the European guidelines. Non-randomized and unblinded studies have shown a potential benefit of pacing in recurrent VVS, but double-blinded randomized controlled trials have not consistently demonstrated positive results. We performed a comprehensive review of the current literature and recent advances in cardiac pacing and pacing algorithms in VVS, and discuss the diagnostic and therapeutic approach to the complex patient with recurrent VVS and reduced quality of life.
Collapse
Affiliation(s)
- Bruno M L Rocha
- Serviço de Cardiologia, Hospital de Santa Cruz, Centro Hospitalar Lisboa Ocidental, Lisboa, Portugal.
| | - Rita V Gomes
- Unidade de Insuficiência Cardíaca, Serviço de Medicina III, Hospital de São Francisco Xavier, Centro Hospitalar Lisboa Ocidental, Lisboa, Portugal; Serviço de Cardiologia, Hospital de Vila Franca de Xira, Vila Franca de Xira, Portugal
| | - Gonçalo J L Cunha
- Serviço de Cardiologia, Hospital de Santa Cruz, Centro Hospitalar Lisboa Ocidental, Lisboa, Portugal
| | - Beatriz M V Silva
- Serviço de Cardiologia, Hospital de Santa Maria, Centro Hospitalar Lisboa Norte, Lisboa, Portugal
| | - Rita Pocinho
- Serviço de Medicina Interna 1.2, Hospital de São José, Centro Hospitalar Lisboa Central, Lisboa, Portugal
| | - Rui Morais
- Unidade de Insuficiência Cardíaca, Serviço de Medicina III, Hospital de São Francisco Xavier, Centro Hospitalar Lisboa Ocidental, Lisboa, Portugal
| | - Inês Araújo
- Unidade de Insuficiência Cardíaca, Serviço de Medicina III, Hospital de São Francisco Xavier, Centro Hospitalar Lisboa Ocidental, Lisboa, Portugal
| | - Cândida Fonseca
- Unidade de Insuficiência Cardíaca, Serviço de Medicina III, Hospital de São Francisco Xavier, Centro Hospitalar Lisboa Ocidental, Lisboa, Portugal; NOVA Medical School, Faculdade de Ciências Médicas, Universidade Nova de Lisboa, Lisboa, Portugal
| |
Collapse
|
30
|
Seewöster T, Lindemann F, Hindricks G. [Differential diagnostics of unclear syncope]. Herz 2019; 44:759-768. [PMID: 31620824 DOI: 10.1007/s00059-019-04852-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
The clarification of syncope is a diagnostic challenge as possible causes often occur only intermittently. Therefore, a detailed and standardized anamnesis is essential as it 1) differentiates syncope from other transient losses of consciousness (TLOC) and 2) directly clarifies possible causes of syncope. The risk stratification plays a central and very important role in order to avoid unnecessary examinations in patients with benign syncope and to provide patients with life-threatening, mostly cardiac syncopal episodes with timely diagnostics and treatment. In cases where the cause of syncope is still unclear, a standardized approach is indicated using extended diagnostics, such as a tilt table examination, a carotid sinus pressure test, prolonged telemetric monitoring or clarification with an implantable loop recorder (ILR).
Collapse
Affiliation(s)
- T Seewöster
- Department of Electrophysiology, Heart Center Leipzig, Strümpellstr. 39, 04289, Leipzig, Deutschland.
| | - F Lindemann
- Department of Electrophysiology, Heart Center Leipzig, Strümpellstr. 39, 04289, Leipzig, Deutschland
| | - G Hindricks
- Department of Electrophysiology, Heart Center Leipzig, Strümpellstr. 39, 04289, Leipzig, Deutschland
| |
Collapse
|
31
|
Diagnostic and therapeutic approach to cardioinhibitory reflex syncope: A complex and controversial issue. REVISTA PORTUGUESA DE CARDIOLOGIA (ENGLISH EDITION) 2019. [DOI: 10.1016/j.repce.2019.11.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
|
32
|
Mittal S, Rogers J, Sarkar S, Koehler J, Passman RS. Real-World Incidence of Pacemaker and Defibrillator Implantation Following Diagnostic Monitoring With an Insertable Cardiac Monitor. Am J Cardiol 2019; 123:1967-1971. [PMID: 30961910 DOI: 10.1016/j.amjcard.2019.03.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/19/2019] [Revised: 03/01/2019] [Accepted: 03/05/2019] [Indexed: 12/29/2022]
Abstract
Insertable cardiac monitors (ICM) are used in patients with suspected or known cardiac arrhythmias; the resulting diagnosis can lead to therapeutic interventions such as a pacemaker (PPM) or defibrillator (ICD) implant. We investigated the incidence of these implants in a large, real-world, cohort of ICM patients. The Optum© EHR de-identified database was used to identify patients with cardiovascular diseases, an ICM implant, ≥180 days of follow-up before and after ICM implant, and no previous history of a PPM or ICD. The Kaplan-Meier (KM) incidence estimates for device implants following an ICM implant were determined. A total of 19,173 patients with an ICM implant were identified. During a mean follow-up of 40 months, either a PPM or ICD was implanted in 21% of patients. A device was implanted in 25% of patients with history of syncope compared with 15% in patients with another indication for ICM implant (p <0.001). There was a significantly greater number of PPM implants following an ICM in patients with history of syncope compared with another indication for ICM implant (23% vs 13% p <0.001); in contrast, there was no difference in ICD implants between the 2 groups (3% in both groups, p = 0.84). In conclusion, a PPM or ICD was ultimately implanted in 21% of ICM patients. Pacemaker implant rates varied significantly with indication for ICM implant, whereas ICD implants rates were similar. In particular, patients with history of syncope had the greatest likelihood of needing a PPM during follow-up.
Collapse
|
33
|
Karaoğuz MR, Yurtseven E, Aslan G, Deliormanlı BG, Adıgüzel Ö, Gönen M, Li KM, Yılmaz EN. The quality of ECG data acquisition, and diagnostic performance of a novel adhesive patch for ambulatory cardiac rhythm monitoring in arrhythmia detection. J Electrocardiol 2019; 54:28-35. [PMID: 30851474 DOI: 10.1016/j.jelectrocard.2019.02.012] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Revised: 01/25/2019] [Accepted: 02/27/2019] [Indexed: 11/28/2022]
Abstract
BACKGROUND Short and long ambulatory electrocardiographic monitoring with different systems is a widely used method to detect cardiac arrhythmias. In this study, we aimed to evaluate the effectiveness of a novel monitoring device on cardiac arrhythmia detection. METHODS We used two different protocols to evaluate device performance. For the first one, 36 healthy subjects were enrolled. The standard 12‑lead, 24-h Holter monitoring and the novel single lead electrocardiogram (ECG) Patch Monitor (EPM) device (BeyondCare®, Rooti Labs Ltd., Taipei, Taiwan) were simultaneously applied to all subjects for 24 h. The quality of ECG data acquisition of novel system was compared to that of standard Holter. The second phase included 73 patients that were referred from our outpatient arrhythmia clinic for evaluation of their symptoms relevant to the cardiac arrhythmias. Advanced algorithms, statistical methods (cross-correlation method, Pearson's correlation coefficient, Bland-Altman plots) were used to process and verify the acquired data. RESULTS The overall average beat per minute correlation between BeyondCare® and standard 12‑lead Holter was found 98% in 33 healthy subjects. The mean percentage of invalid measurements in BeyondCare® was 1.6% while the Holter's was 1.7%. In the second protocol of the study, prospective data from 67 patients who were referred for evaluation of their symptoms relevant to cardiac arrhythmias, showed that the mean BeyondCare® wear time was 4.7 ± 0.5 days out of five total days per protocol. The mean analyzable wear time was 93.6%. The water-resistant design enabled 73.5% of the participants to take a shower. 7.3% of participants had minor skin irritations related to the electrodes. Among the patients with detected arrhythmia (40.2% of all patients), 29.6% had their first arrhythmia after the initial two days period. A clinically significant pause was detected in one patient, ventricular tachycardia was detected in four patients, and supraventricular tachycardia was detected in 15 patients. Paroxysmal atrial fibrillation was identified in seven patients. Three of them had their first episodes after the second day of monitoring. CONCLUSION BeyondCare® Patch was well-tolerated and allowed prolonged time periods for continuous ECG monitoring, may result in an improvement in clinical accuracy and detection of arrhythmias by cloud-based artificial intelligence operating system.
Collapse
Affiliation(s)
- M Remzi Karaoğuz
- Department of Cardiology, Koç University Hospital, Istanbul, Turkey.
| | - Ece Yurtseven
- Department of Cardiology, Koç University Hospital, Istanbul, Turkey
| | - Gamze Aslan
- Department of Cardiology, Koç University Hospital, Istanbul, Turkey
| | | | - Ömer Adıgüzel
- Innovation Department, Arçelik A.Ş., Istanbul, Turkey
| | - Mehmet Gönen
- Department of Industrial Engineering, College of Engineering, Koç University, İstanbul, Turkey
| | - Ko-Mai Li
- Department of Research & Development, Rooti Labs., Taipei, Taiwan
| | | |
Collapse
|
34
|
Bisignani A, De Bonis S, Mancuso L, Ceravolo G, Bisignani G. Implantable loop recorder in clinical practice. J Arrhythm 2019; 35:25-32. [PMID: 30805041 PMCID: PMC6373656 DOI: 10.1002/joa3.12142] [Citation(s) in RCA: 61] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2018] [Revised: 10/01/2018] [Accepted: 10/24/2018] [Indexed: 12/13/2022] Open
Abstract
The implantable loop recorder (ILR), also known as insertable cardiac monitor (ICM) is a subcutaneous device used for diagnosing heart rhythm disorders. These devices have been strongly improved and miniaturized during the last years showing several reliable features along with the availability of remote monitoring which improves the diagnostic timing and the follow-up strategy with a potential reduction of costs for health care. The recent advent of injectable ILRs makes the procedure even easier and more tolerated by patients. ILR allows the investigation of unexplained recurrent syncope with uncertain diagnosis, revealing a possible relationship with cardiac arrhythmias. In addition, it has recently been equipped with sophisticated algorithms able to detect atrial fibrillation episodes. This new opportunity may provide to the physicians systematic heart rhythm screening with possible effects on patient antiarrhythmic and anticoagulant therapy management. The use of such devices will surely increase, since they may be helpful to diagnose a wide range of disorders and pathologies. Indeed, further studies should be performed in order to identify all the potentialities of these tools.
Collapse
Affiliation(s)
- Antonio Bisignani
- Institute of CardiologyCatholic University of the Sacred HeartRomeItaly
| | - Silvana De Bonis
- Department of CardiologyOspedale “Ferrari”Castrovillari (CS)Italy
| | | | | | | |
Collapse
|
35
|
Sakhi R, Theuns DAMJ, Szili-Torok T, Yap SC. Insertable cardiac monitors: current indications and devices. Expert Rev Med Devices 2018; 16:45-55. [PMID: 30522350 DOI: 10.1080/17434440.2018.1557046] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
INTRODUCTION Recurrent unexplained syncope is a well-established indication for an insertable cardiac monitor (ICM). Recently, the indications for an ICM have been expanded. AREAS COVERED This review article discusses the current indications for ICMs and gives an overview of the latest generation of commercially available ICMs. EXPERT COMMENTARY The 2018 ESC Syncope guidelines have expanded the indications for an ICM to patients with inherited cardiomyopathy, inherited channelopathy, suspected unproven epilepsy, and unexplained falls. ICMs are also increasingly used for the detection of subclinical atrial fibrillation (AF) in patients with cryptogenic stroke. Whether treatment of subclinical AF (SCAF) with oral anticoagulation prevents recurrent stroke is yet unknown. The current generation of ICMs are smaller, easier to implant, have better diagnostics, and are capable of remote monitoring. The Reveal LINQ (Medtronic) is the smallest ICM and has the most extensive performance and clinical data. The BioMonitor 2 (Biotronik) is the largest ICM but has excellent R-wave amplitudes, longest longevity, and reliable remote monitoring. The Confirm Rx (Abbott) is capable to provide mobile data transmission enabled by a smartphone app. Future generation of ICMs will incorporate heart failures indices to facilitate remote monitoring of heart failure patients.
Collapse
Affiliation(s)
- Rafi Sakhi
- a Department of Cardiology, Thoraxcenter , Erasmus Medical Center , Rotterdam , The Netherlands
| | - Dominic A M J Theuns
- a Department of Cardiology, Thoraxcenter , Erasmus Medical Center , Rotterdam , The Netherlands
| | - Tamas Szili-Torok
- a Department of Cardiology, Thoraxcenter , Erasmus Medical Center , Rotterdam , The Netherlands
| | - Sing-Chien Yap
- a Department of Cardiology, Thoraxcenter , Erasmus Medical Center , Rotterdam , The Netherlands
| |
Collapse
|
36
|
Kohno R, Nantsupawat T, Benditt DG. Trends in Subcutaneous Cardiac Monitoring Technology. J Innov Card Rhythm Manag 2018; 9:3247-3255. [PMID: 32494499 PMCID: PMC7252872 DOI: 10.19102/icrm.2018.090703] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2017] [Accepted: 02/02/2018] [Indexed: 02/07/2023] Open
Abstract
Ambulatory cardiac monitoring is a rapidly expanding field and one that is likely to progress beyond electrocardiographic (ECG) and blood pressure recordings. To date, the primary cardiac monitoring focus has been ambulatory ECG (AECG) monitoring. In this setting, AECG monitoring has become a diagnostic tool used daily by physicians of many specialties. In this regard, both wearable and subcutaneous ECG monitoring technologies are now widely available, with the appropriate choice for a given patient being best determined by the frequency with which the patient’s symptom recurrences are expected. In other words, the less frequent the symptomatic events, then the longer the monitoring duration requirement should be. However, multiple factors other than the technology used impact success. For example, wearable AECG systems are only capable of monitoring patients for a period of a few days to several weeks due to limited battery longevity, patient intolerance to cutaneous ECG electrodes, the cumbersome nature of the device, or a combination of these factors. Current-generation insertable cardiac monitors (ICMs), on the other hand, offer three years of monitoring and infrequent skin irritation. Additionally, automatic remote download, a valuable feature in many cases, is only offered by certain wearable technologies, but is an option in all currently available ICMs. This report focuses on the current status of subcutaneous ICMs and their indications and limitations. The goal is to highlight the variety of utility of current ICM technologies and to provide insight into potential future subcutaneous ICM applications.
Collapse
Affiliation(s)
- Ritsuko Kohno
- Cardiac Arrhythmia Center, Cardiovascular Division, University of Minnesota, Minneapolis, MN, USA
| | - Teerapat Nantsupawat
- Cardiac Arrhythmia Center, Cardiovascular Division, University of Minnesota, Minneapolis, MN, USA
| | - David G Benditt
- Cardiac Arrhythmia Center, Cardiovascular Division, University of Minnesota, Minneapolis, MN, USA
| |
Collapse
|
37
|
Self-terminating ventricular fibrillation recorded by an implantable loop recorder as a cause of syncope - A case report. J Electrocardiol 2018; 51:617-619. [PMID: 29997000 DOI: 10.1016/j.jelectrocard.2018.04.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Revised: 03/26/2018] [Accepted: 04/11/2018] [Indexed: 11/20/2022]
Abstract
Ventricular fibrillation (VF) is the most common arrhythmia leading to sudden cardiac death, but in rare cases VF can manifest as a syncope, provided that it will self-terminate. We present a case of a 45-year old female with a history of unexplained syncopal episodes despite exhaustive diagnostics. Implantable loop recorder documented an episode of idiopathic, self-terminating VF as a cause of syncope.
Collapse
|
38
|
Reed MJ, Grubb NR, Lang CC, Gray AJ, Simpson K, MacRaild A, Weir CJ. Diagnostic yield of an ambulatory patch monitor in patients with unexplained syncope after initial evaluation in the emergency department: the PATCH-ED study. Emerg Med J 2018; 35:477-485. [PMID: 29921622 DOI: 10.1136/emermed-2018-207570] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2018] [Revised: 05/22/2018] [Accepted: 05/26/2018] [Indexed: 01/08/2023]
Abstract
OBJECTIVES Diagnosing underlying arrhythmia in ED syncope patients remains problematic. This study investigates diagnostic yield, event prevalence, patient satisfaction and compliance, and influence on resource utilisation of an ambulatory patch monitor in unexplained ED syncope patients. METHODS Prospective pilot study conducted in a single tertiary ED in Scotland between 17 November 2015 and 16 June 2017 with a historical unmatched comparator group. Patients 16 years or over presenting within 6 hours of unexplained syncope were fitted in the ED with an ambulatory patch ECG recorder (Zio XT monitor), which continuously records a single-lead ECG for up to 14 days. Patients with an obvious underlying cause were excluded. An unmatched historical group of 603 syncope patients with no obvious diagnosis in ED, recruited to a prior cohort study (2007-2008), were used as a comparator. Primary endpoint was symptomatic significant arrhythmia at 90-day follow-up. RESULTS During the prospective study period, 86 patients were recruited. 90-day diagnostic yield for symptomatic significant arrhythmia was 10.5% (95% CI 4.0 to 16.9; 9 of 86) versus 2.0% (95% CI 0.9 to 3.1; 12 of 603) in the comparator group. 24 patients (27.9%) had a significant arrhythmia (five serious); 26 patients (30.2%) had serious outcomes (major adverse cardiac event and/or death). Blinded patch report review suggested the patch would significantly reduce requirement for standard outpatient ambulatory ECG monitoring. 56 of 76 returned patches had a diagnostic finding within±45 s of a triggered/diary event (73.7% diagnostic utility; 95% CI 63.7 to 83.6); 34 of 56 (61%) for sinus rhythm or ectopic beats only. CONCLUSIONS Routine, early ambulatory ECG monitoring in ED patients with unexplained syncope is probably warranted. A large-scale trial comparing this approach to standard care with cost-effectiveness and safety analysis is now required. TRIAL REGISTRATION NCT02683174.
Collapse
Affiliation(s)
- Matthew J Reed
- Emergency Medicine Research Group Edinburgh (EMERGE), Department of Emergency Medicine, Royal Infirmary of Edinburgh, Edinburgh, UK.,Edinburgh Acute Care, Usher Institute of Population Health Sciences and Informatics, College of Medicine and Veterinary Medicine, University of Edinburgh, Edinburgh, UK
| | - Neil R Grubb
- Department of Cardiology, Royal Infirmary of Edinburgh, Edinburgh, UK
| | | | - Alasdair J Gray
- Emergency Medicine Research Group Edinburgh (EMERGE), Department of Emergency Medicine, Royal Infirmary of Edinburgh, Edinburgh, UK.,Edinburgh Acute Care, Usher Institute of Population Health Sciences and Informatics, College of Medicine and Veterinary Medicine, University of Edinburgh, Edinburgh, UK
| | - Kirsty Simpson
- Emergency Medicine Research Group Edinburgh (EMERGE), Department of Emergency Medicine, Royal Infirmary of Edinburgh, Edinburgh, UK
| | - Allan MacRaild
- Emergency Medicine Research Group Edinburgh (EMERGE), Department of Emergency Medicine, Royal Infirmary of Edinburgh, Edinburgh, UK
| | - Christopher J Weir
- Edinburgh Clinical Trials Unit, Centre for Population Health Sciences, Usher Institute of Population Health Sciences and Informatics, Edinburgh, UK
| |
Collapse
|
39
|
Numeroso F, Mossini G, Lippi G, Cervellin G. Syncope: current knowledge, uncertainties and strategies for management optimisation in the emergency department. Acta Cardiol 2018; 73:215-221. [PMID: 28799452 DOI: 10.1080/00015385.2017.1362146] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Admission rates and expenditures for syncope remain high. This unsatisfactory management could be due to several factors, including lack of evidence-based strategy, poor accuracy of clinical decision rules, difficulty in disseminating guidelines, as well as uncertainties concerning management of intermediate-risk patients and role of observation protocols and syncope units. To optimise management, it has been proposed to adopt a pragmatic, symptoms-based definition of syncope and a classification related to the underlying mechanism rather than suspected aetiology. It has also been emphasised the importance of identifying patients at intermediate risk as they can be safely discharged after an intensive emergency department evaluation. A further improvement might result from a research implementation to validate the role of observation protocols and to select patients amenable to be sent to outpatient syncope units. Finally, future studies on prognostic significance of syncope should be performed with a more careful selection of outcomes and a greater uniformity.
Collapse
Affiliation(s)
- Filippo Numeroso
- Department of Emergency, Academic Hospital of Parma, Parma, Italy
| | | | - Giuseppe Lippi
- Section of Clinical Biochemistry, University of Verona, Verona, Italy
| | | |
Collapse
|
40
|
Schuchert A. [Indications for loop recorder implantation for syncope]. Herzschrittmacherther Elektrophysiol 2018; 29:193-198. [PMID: 29721651 DOI: 10.1007/s00399-018-0571-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Accepted: 04/03/2018] [Indexed: 06/08/2023]
Abstract
Implantable loop recorder with discontinuous ECG recording enables monitoring of heart rhythm over several years. Consequently, in patients with recurrent syncope it is possible to record an ECG during the next syncopal event to obtain symptom-ECG correlations. In patients with recurrent syncope of unknown origin, the implantation of a loop recorder leads to an earlier diagnosis and an asystole is more often detected as the cause of the recurrent syncope. In addition, the loop recorder identifies patients who will benefit from pacemaker implantation. An established indication for early implantation of a loop recorder is given in patients with recurrent syncope and no high-risk marker, e. g., reduced left ventricular function, valve disease, history of myocardial infarction or ECG findings such as bifascicular block, pre-excitation, long QT syndrome or an epsilon wave. These patients should receive a complete cardiological work-up with the aim of detecting the underlying heart disease. Patients with no conclusive findings should also receive a loop recorder. A relative indication is given for patients with recurrent syncope and injuries in order to predict the effect of pacemaker implantation. Possible indication is given for patients with transient loss of consciousness to rule out an arrhythmogenic origin.
Collapse
Affiliation(s)
- Andreas Schuchert
- Medizinische Klinik, Friedrich-Ebert-Krankenhaus, Friesenstr. 11, 24531, Neumünster, Deutschland.
| |
Collapse
|
41
|
Gehi AK, Narla V. Syncope: Laying the Groundwork for a Path Forward. JACC Clin Electrophysiol 2018; 4:274-276. [PMID: 29749949 DOI: 10.1016/j.jacep.2017.10.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Accepted: 10/12/2017] [Indexed: 10/18/2022]
Affiliation(s)
- Anil K Gehi
- Division of Cardiology, Department of Medicine, University of North Carolina Chapel Hill, Chapel Hill, North Carolina.
| | - Venkata Narla
- Division of Cardiology, Department of Medicine, University of North Carolina Chapel Hill, Chapel Hill, North Carolina
| |
Collapse
|
42
|
Brignole M, Moya A, de Lange FJ, Deharo JC, Elliott PM, Fanciulli A, Fedorowski A, Furlan R, Kenny RA, Martín A, Probst V, Reed MJ, Rice CP, Sutton R, Ungar A, van Dijk JG. 2018 ESC Guidelines for the diagnosis and management of syncope. Eur Heart J 2018; 39:1883-1948. [PMID: 29562304 DOI: 10.1093/eurheartj/ehy037] [Citation(s) in RCA: 990] [Impact Index Per Article: 165.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
|
43
|
Abstract
Purpose In patients with structural heart disease (SHD) or inherited primary arrhythmia syndrome (IPAS), the occurrence of unexplained syncope or palpitations can be worrisome as they are at increased risk of sudden cardiac death. An implantable loop recorder (ILR) can be a useful diagnostic tool. Our purpose was to compare the diagnostic yield, arrhythmia mechanism, and management in patients with SHD, patients with IPAS, and those without heart disease. Methods Retrospective single-center study in consecutive patients who underwent an ILR implantation. Results Between March 2013 and December 2016, a total of 94 patients received an ILR (SHD, n = 20; IPAS, n = 14; no SHD/IPAS, n = 60). The type of symptoms at the time of implantation was similar between groups. During a median follow-up of 10 months, 45% had an ILR-guided diagnosis. Patients with IPAS had a lower diagnostic yield (14%) in comparison to the other groups (no SHD/IPAS 47%, P = 0.03; SHD 60%, P = 0.01, respectively). Furthermore, patients with SHD had a higher incidence of nonsustained VT in comparison to patients without SHD/IPAS (30 versus 3%, P < 0.01). ILR-guided therapy was comparable between groups. In the SHD group, a high proportion (10%) received an implantable cardioverter-defibrillator; however, this was not statistically significantly higher than the other groups (no SHD/IPAS 3%, IPAS 0%, P = 0.08). Conclusions In comparison to patients without heart disease, the diagnostic yield of an ILR was lower in patients with IPAS and the prevalence of ILR-diagnosed nonsustained VT was higher in patients with SHD.
Collapse
|
44
|
Huemer M, Becker AK, Wutzler A, Attanasio P, Parwani AS, Lacour P, Boldt LH, Pieske B, Haverkamp W, Blaschke F. Implantable loop recorders in patients with unexplained syncope: Clinical predictors of pacemaker implantation. Cardiol J 2018; 26:36-46. [PMID: 29399750 DOI: 10.5603/cj.a2018.0008] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2017] [Accepted: 11/12/2017] [Indexed: 11/25/2022] Open
Abstract
BACKGROUND Implantable loop recorders (ILR) are a valuable tool for the investigation of unexplainedsyncopal episodes. The aim of this retrospective single center study was to identify predictive factors for pacemaker implantation in patients with unexplained syncope who underwent ILR insertion. METHODS One hundred six patients were retrospectively analyzed (mean age 59.1 years; 47.2% male) with unexplained syncope and negative conventional testing who underwent ILR implantation. The pri- mary study endpoint was detection of symptomatic or asymptomatic bradycardia requiring pacemaker implantation. RESULTS The average follow-up period after ILR implantation was 20 ± 15 months. Pacemaker im- plantation according to current guidelines was necessary in 22 (20.8%) patients, mean duration until index bradycardia was 81 ± 88 (2-350) days. Ten (45.5%) patients received a pacemaker due to sinus arrest, 7 (31.8%) patients due to third-degree atrioventricular block, 2 (9.1%) patients due to second- degree atrioventricular block and 1 (4.5%) patient due to atrial fibrillation with a slow ventricular rate. Three factors remained significant in multivariate analysis: obesity, which defined by a body mass index above 30 kg/m2 (OR: 7.39, p = 0.014), a right bundle branch block (OR: 9.40, p = 0.023) and chronic renal failure as defined by a glomerular filtration rate of less than 60 mL/min (OR: 6.42, p = 0.035). CONCLUSIONS Bradycardia is a frequent finding in patients undergoing ILR implantation due to un- explained syncope. Obesity, right bundle branch block and chronic renal failure are independent clinical predictors of pacemaker implantation.
Collapse
Affiliation(s)
- Martin Huemer
- Department of Cardiology, Campus Virchow-Klinikum, Charité - University Medicine Berlin, Germany
| | - Ann-Kristin Becker
- Department of Cardiology, Campus Virchow-Klinikum, Charité - University Medicine Berlin, Germany
| | - Alexander Wutzler
- Department of Cardiology, Campus Virchow-Klinikum, Charité - University Medicine Berlin, Germany
| | - Philipp Attanasio
- Department of Cardiology, Campus Virchow-Klinikum, Charité - University Medicine Berlin, Germany
| | - Abdul S Parwani
- Department of Cardiology, Campus Virchow-Klinikum, Charité - University Medicine Berlin, Germany
| | - Philipp Lacour
- Department of Cardiology, Campus Virchow-Klinikum, Charité - University Medicine Berlin, Germany
| | - Leif-Hendrik Boldt
- Department of Cardiology, Campus Virchow-Klinikum, Charité - University Medicine Berlin, Germany
| | - Burkert Pieske
- Department of Cardiology, Campus Virchow-Klinikum, Charité - University Medicine Berlin, Germany
| | - Wilhelm Haverkamp
- Department of Cardiology, Campus Virchow-Klinikum, Charité - University Medicine Berlin, Germany
| | - Florian Blaschke
- Department of Cardiology, Campus Virchow-Klinikum, Charité - University Medicine Berlin, Germany.
| |
Collapse
|
45
|
Benditt DG, Adkisson WO, Sutton R, Mears RK, Sakaguchi S. Ambulatory diagnostic ECG monitoring for syncope and collapse: An assessment of clinical practice in the United States. Pacing Clin Electrophysiol 2018; 41:203-209. [PMID: 29314105 DOI: 10.1111/pace.13265] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/15/2017] [Revised: 10/19/2017] [Accepted: 11/04/2017] [Indexed: 11/28/2022]
Abstract
INTRODUCTION Diagnostic ambulatory electrocardiogram (AECG) monitoring is widely used for evaluating syncope and collapse, and practice guidelines provide recommendations regarding optimal AECG device selection. However, whether physicians utilize AECGs in accordance with the pertinent guidelines is unclear. This study assessed utilization of AECG monitoring systems for syncope and collapse diagnosis by physicians in the United States. METHODS AND RESULTS A quantitative survey was undertaken of physicians comprising multiple specialties (emergency department, n = 35; primary care, n = 35; hospitalists, n = 30; neurologists, n = 30; nonimplanting, n = 34, and implanting-cardiologists, n = 35). Depending on specialty, respondents reported that neural-reflex and orthostatic causes accounted for 17-23%, cardiac causes for 12-20%, and "neurological causes" (specifically psychogenic pseudo-syncope/pseudo-seizures and acute cerebrovascular conditions) for 7-12% of their syncope/collapse cases. The choice of AECG technology varied by specialty. Thus, despite patients having daily symptoms, 25% of respondents chose an AECG technology other than a Holter-type monitor. Conversely, when monitoring for infrequent events (e.g., less than monthly), 12-18% indicated that they would choose a 24- to 48-hour Holter, 20-34% would choose either a conventional event recorder or a mobile cardiac telemetry system, and only 53-65% would select an insertable cardiac monitor. CONCLUSIONS In evaluation of syncope/collapse, most U.S. clinicians across specialties use AECGs appropriately, but in a substantial minority there remains discordance between choice of AECG technology and guideline-based recommendations.
Collapse
Affiliation(s)
- David G Benditt
- Cardiac Arrhythmia Center, Cardiovascular Division, University of Minnesota Medical School, Minneapolis, MN, USA
| | - Wayne O Adkisson
- Cardiac Arrhythmia Center, Cardiovascular Division, University of Minnesota Medical School, Minneapolis, MN, USA
| | | | | | - Scott Sakaguchi
- Cardiac Arrhythmia Center, Cardiovascular Division, University of Minnesota Medical School, Minneapolis, MN, USA
| |
Collapse
|
46
|
Tanno K. Use of implantable and external loop recorders in syncope with unknown causes. J Arrhythm 2017; 33:579-582. [PMID: 29255504 PMCID: PMC5728713 DOI: 10.1016/j.joa.2017.03.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2017] [Accepted: 03/27/2017] [Indexed: 11/24/2022] Open
Abstract
The gold standard for diagnosing syncope is to elucidate the symptom-electrocardiogram (ECG) correlation. The ECG recordings during syncope allow physicians to either confirm or exclude an arrhythmia as the mechanism of syncope. Many studies have investigated the use of internal loop recorder (ILR), while few studies have used external loop recorder (ELR) for patients with unexplained syncope. The aim of this review is to clarify the clinical usefulness of ILR and ELR in the diagnosis and management of patients with unexplained syncope. Many observational and four randomized control studies have shown that ILR for patients with unknown syncope is a useful tool for early diagnosis and improving diagnosis rate. ILR also provides important information on the mechanism of syncope and treatment strategy. However, there is no evidence of total mortality or quality of life improvements with ILR. The diagnostic yield of ELR in patients with syncope was similar to that with ILR within the same timeframe. Therefore, ELR could be considered for long-term ECG monitoring before a patient switches to using ILR. A systematic approach and selection of ECG monitoring tools reduces health care costs and improves the selection of patients for optimal treatment possibilities.
Collapse
Affiliation(s)
- Kaoru Tanno
- Cardiovascular Division, Showa University Koto-Toyosu Hospital, 5-1-38 Toyosu Koto-Ku, Tokyo 135-8577, Japan
| |
Collapse
|
47
|
Pournazari P, Oqab Z, Sheldon R. Diagnostic Value of Neurological Studies in Diagnosing Syncope: A Systematic Review. Can J Cardiol 2017; 33:1604-1610. [DOI: 10.1016/j.cjca.2017.04.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2017] [Revised: 04/09/2017] [Accepted: 04/10/2017] [Indexed: 10/19/2022] Open
|
48
|
Ibrahim OA, Drew D, Hayes CJ, McIntyre W, Seifer CM, Hopman W, Glover B, Baranchuk AM. Implantable loop recorders in the real world: a study of two Canadian centers. J Interv Card Electrophysiol 2017; 50:179-185. [DOI: 10.1007/s10840-017-0294-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/22/2017] [Accepted: 10/16/2017] [Indexed: 12/20/2022]
|
49
|
Shen WK, Sheldon RS, Benditt DG, Cohen MI, Forman DE, Goldberger ZD, Grubb BP, Hamdan MH, Krahn AD, Link MS, Olshansky B, Raj SR, Sandhu RK, Sorajja D, Sun BC, Yancy CW. 2017 ACC/AHA/HRS Guideline for the Evaluation and Management of Patients With Syncope: A Report of the American College of Cardiology/American Heart Association Task Force on Clinical Practice Guidelines and the Heart Rhythm Society. Circulation 2017; 136:e60-e122. [DOI: 10.1161/cir.0000000000000499] [Citation(s) in RCA: 100] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Win-Kuang Shen
- Writing committee members are required to recuse themselves from voting on sections to which their specific relationships with industry may apply; see Appendix 1 for detailed information. ACC/AHA Task Force on Clinical Practice Guidelines Liaison. ACC/AHA Representative. HRS Representative. ACEP and SAEM Joint Representative. ACC/AHA Task Force on Performance Measures Liaison
| | | | - David G. Benditt
- Writing committee members are required to recuse themselves from voting on sections to which their specific relationships with industry may apply; see Appendix 1 for detailed information. ACC/AHA Task Force on Clinical Practice Guidelines Liaison. ACC/AHA Representative. HRS Representative. ACEP and SAEM Joint Representative. ACC/AHA Task Force on Performance Measures Liaison
| | - Mitchell I. Cohen
- Writing committee members are required to recuse themselves from voting on sections to which their specific relationships with industry may apply; see Appendix 1 for detailed information. ACC/AHA Task Force on Clinical Practice Guidelines Liaison. ACC/AHA Representative. HRS Representative. ACEP and SAEM Joint Representative. ACC/AHA Task Force on Performance Measures Liaison
| | - Daniel E. Forman
- Writing committee members are required to recuse themselves from voting on sections to which their specific relationships with industry may apply; see Appendix 1 for detailed information. ACC/AHA Task Force on Clinical Practice Guidelines Liaison. ACC/AHA Representative. HRS Representative. ACEP and SAEM Joint Representative. ACC/AHA Task Force on Performance Measures Liaison
| | - Zachary D. Goldberger
- Writing committee members are required to recuse themselves from voting on sections to which their specific relationships with industry may apply; see Appendix 1 for detailed information. ACC/AHA Task Force on Clinical Practice Guidelines Liaison. ACC/AHA Representative. HRS Representative. ACEP and SAEM Joint Representative. ACC/AHA Task Force on Performance Measures Liaison
| | - Blair P. Grubb
- Writing committee members are required to recuse themselves from voting on sections to which their specific relationships with industry may apply; see Appendix 1 for detailed information. ACC/AHA Task Force on Clinical Practice Guidelines Liaison. ACC/AHA Representative. HRS Representative. ACEP and SAEM Joint Representative. ACC/AHA Task Force on Performance Measures Liaison
| | - Mohamed H. Hamdan
- Writing committee members are required to recuse themselves from voting on sections to which their specific relationships with industry may apply; see Appendix 1 for detailed information. ACC/AHA Task Force on Clinical Practice Guidelines Liaison. ACC/AHA Representative. HRS Representative. ACEP and SAEM Joint Representative. ACC/AHA Task Force on Performance Measures Liaison
| | - Andrew D. Krahn
- Writing committee members are required to recuse themselves from voting on sections to which their specific relationships with industry may apply; see Appendix 1 for detailed information. ACC/AHA Task Force on Clinical Practice Guidelines Liaison. ACC/AHA Representative. HRS Representative. ACEP and SAEM Joint Representative. ACC/AHA Task Force on Performance Measures Liaison
| | - Mark S. Link
- Writing committee members are required to recuse themselves from voting on sections to which their specific relationships with industry may apply; see Appendix 1 for detailed information. ACC/AHA Task Force on Clinical Practice Guidelines Liaison. ACC/AHA Representative. HRS Representative. ACEP and SAEM Joint Representative. ACC/AHA Task Force on Performance Measures Liaison
| | - Brian Olshansky
- Writing committee members are required to recuse themselves from voting on sections to which their specific relationships with industry may apply; see Appendix 1 for detailed information. ACC/AHA Task Force on Clinical Practice Guidelines Liaison. ACC/AHA Representative. HRS Representative. ACEP and SAEM Joint Representative. ACC/AHA Task Force on Performance Measures Liaison
| | - Satish R. Raj
- Writing committee members are required to recuse themselves from voting on sections to which their specific relationships with industry may apply; see Appendix 1 for detailed information. ACC/AHA Task Force on Clinical Practice Guidelines Liaison. ACC/AHA Representative. HRS Representative. ACEP and SAEM Joint Representative. ACC/AHA Task Force on Performance Measures Liaison
| | - Roopinder Kaur Sandhu
- Writing committee members are required to recuse themselves from voting on sections to which their specific relationships with industry may apply; see Appendix 1 for detailed information. ACC/AHA Task Force on Clinical Practice Guidelines Liaison. ACC/AHA Representative. HRS Representative. ACEP and SAEM Joint Representative. ACC/AHA Task Force on Performance Measures Liaison
| | - Dan Sorajja
- Writing committee members are required to recuse themselves from voting on sections to which their specific relationships with industry may apply; see Appendix 1 for detailed information. ACC/AHA Task Force on Clinical Practice Guidelines Liaison. ACC/AHA Representative. HRS Representative. ACEP and SAEM Joint Representative. ACC/AHA Task Force on Performance Measures Liaison
| | - Benjamin C. Sun
- Writing committee members are required to recuse themselves from voting on sections to which their specific relationships with industry may apply; see Appendix 1 for detailed information. ACC/AHA Task Force on Clinical Practice Guidelines Liaison. ACC/AHA Representative. HRS Representative. ACEP and SAEM Joint Representative. ACC/AHA Task Force on Performance Measures Liaison
| | - Clyde W. Yancy
- Writing committee members are required to recuse themselves from voting on sections to which their specific relationships with industry may apply; see Appendix 1 for detailed information. ACC/AHA Task Force on Clinical Practice Guidelines Liaison. ACC/AHA Representative. HRS Representative. ACEP and SAEM Joint Representative. ACC/AHA Task Force on Performance Measures Liaison
| |
Collapse
|
50
|
|