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Fleet H, Pilcher D, Bellomo R, Coulson TG. Predicting atrial fibrillation after cardiac surgery: a scoping review of associated factors and systematic review of existing prediction models. Perfusion 2023; 38:92-108. [PMID: 34405746 DOI: 10.1177/02676591211037025] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
INTRODUCTION Postoperative atrial fibrillation (POAF) is common after cardiac surgery and associated with increased hospital length of stay, patient morbidity and mortality. We aimed to identify factors associated with POAF and evaluate the accuracy of available POAF prediction models. METHODS We screened articles from Ovid MEDLINE® and PubMed Central® (PMC) and included studies that evaluated risk factors associated with POAF or studies that designed or validated POAF prediction models. We only included studies in cardiac surgical patients with sample size n ⩾ 50 and a POAF outcome group ⩾20. We summarised factors that were associated with POAF and assessed prediction model performance by reviewing reported calibration and discriminative ability. RESULTS We reviewed 232 studies. Of these, 142 fulfilled the inclusion criteria. Age was frequently found to be associated with POAF, while most other variables showed contradictory findings, or were assessed in few studies. Overall, 15 studies specifically developed and/or validated 12 prediction models. Of these, all showed poor discrimination or absent calibration in predicting POAF in externally validated cohorts. CONCLUSIONS Except for age, reporting of factors associated with POAF is inconsistent and often contradictory. Prediction models have low discrimination, missing calibration statistics, are at risk of bias and show limited clinical applicability. This suggests the need for studies that prospectively collect AF relevant data in large cohorts and then proceed to validate findings in external data sets.
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Affiliation(s)
- Hugh Fleet
- Melbourne Medical School, The University of Melbourne, Melbourne, VIC, Australia
| | - David Pilcher
- Department of Epidemiology and Preventative Medicine, Monash University, Melbourne, VIC, Australia
| | - Rinaldo Bellomo
- Centre for Integrated Critical Care, The University of Melbourne, Parkville, VIC, Australia
| | - Tim G Coulson
- Department of Epidemiology and Preventative Medicine, Monash University, Melbourne, VIC, Australia
- Centre for Integrated Critical Care, The University of Melbourne, Parkville, VIC, Australia
- Department of Anaesthesia, Austin Hospital, Melbourne, VIC, Australia
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Kawczynski MJ, Van De Walle S, Maesen B, Isaacs A, Zeemering S, Hermans B, Vernooy K, Maessen JG, Schotten U, Bidar E. Preoperative P-wave parameters and risk of atrial fibrillation after cardiac surgery: a meta-analysis of 20 201 patients. Interact Cardiovasc Thorac Surg 2022; 35:6673150. [PMID: 35993895 PMCID: PMC9492265 DOI: 10.1093/icvts/ivac220] [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: 07/28/2022] [Accepted: 08/19/2022] [Indexed: 11/14/2022] Open
Abstract
Abstract
OBJECTIVES
To evaluate the role of P-wave parameters, as defined on preprocedural electrocardiography (ECG), in predicting atrial fibrillation after cardiac surgery [postoperative atrial fibrillation (POAF)].
METHODS
PubMed, Cochrane library and Embase were searched for studies reporting on P-wave parameters and risk of POAF. Meta-analysis of P-wave parameters reported by at least 5 different publications was performed. In case of receiver operator characteristics (ROC-curve) analysis in the original publications, an ROC meta-analysis was performed to summarize the sensitivity and specificity.
RESULTS
Thirty-two publications, with a total of 20 201 patients, contributed to the meta-analysis. Increased P-wave duration, measured on conventional 12-lead ECG (22 studies, Cohen’s d = 0.4, 95% confidence interval: 0.3–0.5, P < 0.0001) and signal-averaged ECG (12 studies, Cohen’s d = 0.8, 95% confidence interval: 0.5–1.2, P < 0.0001), was a predictor of POAF independently from left atrial size. ROC meta-analysis for signal-averaged ECG P-wave duration showed an overall sensitivity of 72% (95% confidence interval: 65–78%) and specificity of 68% (95% confidence interval: 58–77%). Summary ROC curve had a moderate discriminative power with an area under the curve of 0.76. There was substantial heterogeneity in the meta-analyses for P-wave dispersion and PR-interval.
CONCLUSIONS
This meta-analysis shows that increased P-wave duration, measured on conventional 12-lead ECG and signal-averaged ECG, predicted POAF in patients undergoing cardiac surgery.
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Affiliation(s)
- Michal J Kawczynski
- Department of Cardiothoracic Surgery, Heart and Vascular Centre, Maastricht University Medical Centre , Maastricht, Netherlands
- Department of Physiology, Maastricht University , Maastricht, Netherlands
| | - Sophie Van De Walle
- Department of Cardiothoracic Surgery, Heart and Vascular Centre, Maastricht University Medical Centre , Maastricht, Netherlands
| | - Bart Maesen
- Department of Cardiothoracic Surgery, Heart and Vascular Centre, Maastricht University Medical Centre , Maastricht, Netherlands
- Department of Physiology, Maastricht University , Maastricht, Netherlands
| | - Aaron Isaacs
- Department of Physiology, Maastricht University , Maastricht, Netherlands
| | - Stef Zeemering
- Department of Physiology, Maastricht University , Maastricht, Netherlands
- Cardiovascular Research Institute Maastricht (CARIM) , Maastricht, Netherlands
| | - Ben Hermans
- Department of Physiology, Maastricht University , Maastricht, Netherlands
- Cardiovascular Research Institute Maastricht (CARIM) , Maastricht, Netherlands
| | - Kevin Vernooy
- Cardiovascular Research Institute Maastricht (CARIM) , Maastricht, Netherlands
- Department of Cardiology, Heart and Vascular Centre, Maastricht University Medical Centre , Maastricht, Netherlands
| | - Jos G Maessen
- Department of Cardiothoracic Surgery, Heart and Vascular Centre, Maastricht University Medical Centre , Maastricht, Netherlands
- Department of Physiology, Maastricht University , Maastricht, Netherlands
| | - Ulrich Schotten
- Department of Physiology, Maastricht University , Maastricht, Netherlands
| | - Elham Bidar
- Department of Cardiothoracic Surgery, Heart and Vascular Centre, Maastricht University Medical Centre , Maastricht, Netherlands
- Department of Physiology, Maastricht University , Maastricht, Netherlands
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Taner T, Pala AA, Camci S, Turk T, Ari H. The value of atrial electromechanical delay in predicting atrial fibrillation development after coronary artery bypass surgery. Echocardiography 2021; 39:28-36. [PMID: 34873748 DOI: 10.1111/echo.15237] [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: 05/12/2021] [Revised: 09/01/2021] [Accepted: 10/13/2021] [Indexed: 11/27/2022] Open
Abstract
OBJECTIVE Predicting postoperative atrial fibrillation (PoAF) in the preoperative period will provide a serious advantage in preventing the morbidity and mortality associated with this arrhythmia and in planning the treatment. In this study, we investigated the value of atrial electromechanical delay (AEMD) in predicting the development of PoAF. METHODS A total of 93 patients who underwent isolated coronary artery bypass grafting (CABG) operation were included in this prospective study. Patients' demographic characteristics, laboratory parameters, echocardiographic data, and AEMD durations that could be measured by the co-use of electrocardiography and echocardiography were recorded. The patients at sinus rhythm during the postoperative period were identified as "Group 1", and those who developed PoAF were identified as "Group 2". RESULTS PoAF incidence was 26.88% (n = 25). Left ventricle (LV) lateral AEMD, LV medial AEMD, right ventricle lateral AEMD, and left atrium (LA) lateral AEMD durations of Group 2 were significantly higher than Group 1 (p < 0.001, p = 0.004, p = 0.004, p < 0.001; respectively). In Univariate Logistic Regression Analysis, the age, hypertension, LA maximum volume, LA lateral AEMD and pulmonary artery pressure were significantly associated with PoAF development (p = 0.01, p = 0.004, p = 0.004, p = 0.001, p = 0.01; respectively). However, only LA lateral AEMD was found as an independent predictive factor for the development of PoAF in the Multivariate Logistic Regression Analysis (OR:1.03, 95% CI:1.001-1.06, p = 0.04). AUC was .741 for LA lateral AEMD in ROC Curve Analysis (95% CI: .633-.849, p < 0.001). CONCLUSIONS The development of PoAF can be predicted by AEMD durations measured in the preoperative period in patients undergoing isolated CABG.
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Affiliation(s)
- Temmuz Taner
- Bursa Postgraduate Hospital, Department of Cardiac and Vascular Surgery, Bursa, Turkey
| | - Arda Aybars Pala
- Bursa Postgraduate Hospital, Department of Cardiac and Vascular Surgery, Bursa, Turkey
| | - Sencer Camci
- Bursa Postgraduate Hospital, Department of Cardiology, Bursa, Turkey
| | - Tamer Turk
- Bursa Postgraduate Hospital, Department of Cardiology, Bursa, Turkey
| | - Hasan Ari
- Bursa Postgraduate Hospital, Department of Cardiology, Bursa, Turkey
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Echocardiography-derived total atrial conduction time (PA-TDI duration): risk stratification and guidance in atrial fibrillation management. Clin Res Cardiol 2021; 110:1734-1742. [PMID: 34453577 PMCID: PMC8563556 DOI: 10.1007/s00392-021-01917-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Accepted: 08/02/2021] [Indexed: 12/19/2022]
Abstract
Atrial fibrillation (AF) is a major cause of cardiovascular morbidity and mortality. To early detect and to avoid AF-related complications, several cardiac imaging modalities and approaches aim to quantify the severity of the underlying atrial cardiomyopathy (i.e., the extent of atrial remodeling). However, most established cardiac imaging modalities just incorporate single components of atrial remodeling and do not reflect the complete multifactorial process, which may contribute to their limited predictive value. Echocardiography-derived PA-TDI duration is a sophisticated echocardiographic parameter to assess total atrial conduction time and directly reflects both electrical and structural changes to the atria. Therefore, PA-TDI duration provides a more comprehensive quantification of the extent of atrial remodeling than other imaging modalities. In this article we review the role of PA-TDI duration as a marker of atrial remodeling and summarize the available data on PA-TDI duration to identify patients at risk for AF, as well as to guide AF management. Moreover, we discuss how to assess PA-TDI duration and provide recommendations on the implementation of PA-TDI duration into routine clinical care.
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Kawczynski MJ, Gilbers M, Van De Walle S, Schalla S, Crijns HJ, Maessen JG, Schotten U, Maesen B, Bidar E. Role of pre-operative transthoracic echocardiography in predicting post-operative atrial fibrillation after cardiac surgery: a systematic review of the literature and meta-analysis. Europace 2021; 23:1731-1743. [PMID: 34000038 DOI: 10.1093/europace/euab095] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Accepted: 03/30/2021] [Indexed: 11/12/2022] Open
Abstract
AIMS This systematic review and meta-analysis aims to evaluate the role of pre-operative transthoracic echocardiography in predicting post-operative atrial fibrillation (POAF) after cardiac surgery. METHODS AND RESULTS Electronic databases were searched for studies reporting on pre-operative echocardiographic predictors of POAF in PubMed, Cochrane library, and Embase. A meta-analysis of echocardiographic predictors of POAF that were identified by at least five different publications was performed. Forty-three publications were included in this systematic review. Echocardiographic predictors for POAF included surrogate parameters for total atrial conduction time (TACT), structural cardiac changes, and functional disturbances. Meta-analysis showed that prolonged pre-operative PA-TDI interval [5 studies, Cohen's d = 1.4, 95% confidence interval (CI) 0.9-1.9], increased left atrial volume indexed for body surface area (LAVI) (23 studies, Cohen's d = 0.8, 95% CI 0.6-1.0), and reduced peak atrial longitudinal strain (PALS) (5 studies, Cohen's d = 1.4, 95% CI 1.0-1.8), were associated with POAF incidence. Left atrial volume indexed for body surface was the most important predicting factor in patients without a history of AF. These parameters remained important predictors of POAF in heterogeneous populations with variable age and comorbidities such as coronary artery disease and valvular disease. CONCLUSION This meta-analysis shows that increased TACT, increased LAVI, and reduced PALS are valuable parameters for predicting POAF in the early post-operative phase in a large variety of patients.
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Affiliation(s)
- Michal J Kawczynski
- Department of Cardiothoracic Surgery, Heart and Vascular Centre Maastricht University Medical Centre, Professor Debyelaan 25, 6229 HX Maastricht, The Netherlands.,Department of Physiology, Maastricht University, Maastricht, The Netherlands
| | - Martijn Gilbers
- Department of Cardiothoracic Surgery, Heart and Vascular Centre Maastricht University Medical Centre, Professor Debyelaan 25, 6229 HX Maastricht, The Netherlands.,Department of Physiology, Maastricht University, Maastricht, The Netherlands
| | - Sophie Van De Walle
- Department of Cardiothoracic Surgery, Heart and Vascular Centre Maastricht University Medical Centre, Professor Debyelaan 25, 6229 HX Maastricht, The Netherlands
| | - Simon Schalla
- Cardiovascular Research Institute Maastricht (CARIM), Maastricht, The Netherlands.,Department of Cardiology, Heart and Vascular Centre, Maastricht University Medical Centre, Maastricht, The Netherlands.,Department of Radiology, Maastricht University Medical Centre, Maastricht, The Netherlands
| | - Harry J Crijns
- Cardiovascular Research Institute Maastricht (CARIM), Maastricht, The Netherlands.,Department of Cardiology, Heart and Vascular Centre, Maastricht University Medical Centre, Maastricht, The Netherlands
| | - Jos G Maessen
- Department of Cardiothoracic Surgery, Heart and Vascular Centre Maastricht University Medical Centre, Professor Debyelaan 25, 6229 HX Maastricht, The Netherlands.,Department of Physiology, Maastricht University, Maastricht, The Netherlands
| | - Ulrich Schotten
- Department of Physiology, Maastricht University, Maastricht, The Netherlands
| | - Bart Maesen
- Department of Cardiothoracic Surgery, Heart and Vascular Centre Maastricht University Medical Centre, Professor Debyelaan 25, 6229 HX Maastricht, The Netherlands.,Department of Physiology, Maastricht University, Maastricht, The Netherlands
| | - Elham Bidar
- Department of Cardiothoracic Surgery, Heart and Vascular Centre Maastricht University Medical Centre, Professor Debyelaan 25, 6229 HX Maastricht, The Netherlands.,Department of Physiology, Maastricht University, Maastricht, The Netherlands
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Ortega MC, Ramos DBB, Novoa JCR, Suarez FJO, Ramírez FD, González MD. Impact of Transcatheter Device Closure of Atrial Septal Defect on Atrial Arrhythmias Propensity in Young Adults. Pediatr Cardiol 2020; 41:54-61. [PMID: 31673734 DOI: 10.1007/s00246-019-02221-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/12/2019] [Accepted: 10/15/2019] [Indexed: 11/29/2022]
Abstract
Atrial septal defect (ASD) is a condition that requires early intervention because of the consequences over the right-side heart. Chronic atrial stretching promotes atrial conduction delay and the imbalance of the conduction homogeneity, which lead to the propensity to atrial arrhythmias (AA). We aim to evaluate the impact of transcatheter closure of ASD on atrial vulnerability markers leading to late AA in young adults. We conducted a prospective, longitudinal study in one hundred patients (mean age 25.2 ± 5.4 years) who underwent transcatheter closure of ASD at Cardiocentro Pediátrico William Soler. P-wave maximum (Pmax) and P-wave dispersion (Pd) were analyzed from 12-lead electrocardiogram. Left-side and right-side intraatrial and interatrial electromechanical delay (EMD) were measured with tissue Doppler imaging. Both electrocardiographic and echocardiographic analyses were performed during the study period. Compared to baseline, there was a significant reduction in P max (p ≤ 0.001) and Pd (p ≤ 0.001) after 3 months of procedure. All atrial electromechanical coupling parameters significantly reduced at 6 months of ASD closure and tend to remain at lower values till the last evaluation. Over 9.2 ± 1.6 years of follow-up, 15 subjects (15%) developed AA, of which intraatrial reentrant tachycardia (66.6%) became the main rhythm disturbance. Intra-right atrial EMD ≥ 16 ms (HR 4.08, 95% CI 1.15-14.56; p = 0.03) and Pd 45 ms (HR 1.66, 95% CI 1.06-2.59; p = 0.02) were identified as predictors of late AA. Transcatheter device closure of ASD in young adults promotes a significant reduction of electrocardiographic and echocardiographic markers of AA vulnerability, which persist during the long-term follow-up. Nevertheless, Pd and interatrial EMD were identified as independent risk factors of AA.
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Affiliation(s)
- Michel Cabrera Ortega
- Section of Arrhythmia and Cardiac Pacing, Cardiocentro Pediátrico William Soler, San Francisco e/ 100 y Perla, 10800, Boyeros, La Habana, Cuba.
| | - Dunia Bárbara Benítez Ramos
- Department of Pediatric Cardiology, Cardiocentro Pediátrico William Soler, 100 y Perla, Boyeros, Havana, Cuba
| | - Juan Carlos Ramiro Novoa
- Laboratory of Hemodynamia, Cardiocentro Pediátrico William Soler, 100 y Perla, Boyeros, Havana, Cuba
| | | | - Francisco Díaz Ramírez
- Laboratory of Hemodynamia, Cardiocentro Pediátrico William Soler, 100 y Perla, Boyeros, Havana, Cuba
| | - Mabel Domínguez González
- Laboratory of Hemodynamia, Cardiocentro Pediátrico William Soler, 100 y Perla, Boyeros, Havana, Cuba
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Okamura H, Arakawa M, Miyagawa A, Adachi H. Incidence of postoperative atrial fibrillation in transdermal β-blocker patch users is lower than that in oral β-blocker users after cardiac and/or thoracic aortic surgery. Gen Thorac Cardiovasc Surg 2019; 67:1007-1013. [PMID: 31049816 DOI: 10.1007/s11748-019-01131-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Accepted: 04/23/2019] [Indexed: 11/28/2022]
Abstract
OBJECTIVE Postoperative atrial fibrillation (POAF) after open heart surgery is associated with a high risk of mortality and morbidity. Although oral β-blockers are usually recommended to prevent POAF, the efficacy of a transdermal β-blocker patch in preventing POAF is unclear. We compared the incidence of POAF between users of oral and transdermal bisoprolol. METHODS We investigated 108 patients who underwent cardiac and/or thoracic aortic surgery between April 2016 and February 2018. We compared perioperative clinical and hemodynamic variables between 49 patients treated with a transdermal bisoprolol patch and 59 patients treated with an oral bisoprolol fumarate. RESULTS POAF occurred in 24% of patients in the transdermal and in 46% of patients in the oral bisoprolol groups (p = 0.027). No intergroup difference was observed in in-hospital mortality, perioperative blood pressures and heart rates, and other morbidities. Multivariable logistic regression analysis revealed that the use of transdermal bisoprolol was independently associated with a lower rate of POAF (odds ratio 0.21, 95% confidence interval 0.05-0.84, p = 0.027). CONCLUSIONS A transdermal bisoprolol patch is an effective and safe β-blocker drug delivery system. The incidence of POAF in this group was lower than that in users of oral bisoprolol.
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Affiliation(s)
- Homare Okamura
- Department of Cardiovascular Surgery, Nerima Hikarigaoka Hospital, 2-11-1 Hikarigaoka, Nerima-Ku, Tokyo, 179-0072, Japan.
| | - Mamoru Arakawa
- Department of Cardiovascular Surgery, Nerima Hikarigaoka Hospital, 2-11-1 Hikarigaoka, Nerima-Ku, Tokyo, 179-0072, Japan
| | - Atsushi Miyagawa
- Department of Cardiovascular Surgery, Nerima Hikarigaoka Hospital, 2-11-1 Hikarigaoka, Nerima-Ku, Tokyo, 179-0072, Japan
| | - Hideo Adachi
- Department of Cardiovascular Surgery, Nerima Hikarigaoka Hospital, 2-11-1 Hikarigaoka, Nerima-Ku, Tokyo, 179-0072, Japan
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Sabry ASM, Mansour HAEK, Abo El-Azm TH, Mostafa SA, Zahid BS. Echocardiographic predictors of atrial fibrillation after mitral valve replacement. Egypt Heart J 2017; 69:281-288. [PMID: 29622989 PMCID: PMC5883501 DOI: 10.1016/j.ehj.2017.07.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2016] [Accepted: 07/12/2017] [Indexed: 11/23/2022] Open
Abstract
Objectives Detection of the echocardiographic predictors of post-operative atrial fibrillation in patients with rheumatic mitral valve disease undergoing mitral valve replacement. Methods The study included 50 patients with rheumatic mitral valve disease undergoing mitral valve replacement. Preoperative assessment included standard two-dimensional echocardiography to assess LA diameter, volume, and emptying fraction, LV volume and ejection fraction. TDI derived velocity, strain of the left atrium and speckle tracking to assess left ventricular function then postoperative follow up for 1 month for occurrence of atrial fibrillation. Results The incidence of postoperative AF was 44%; these patients were significantly older (P = 0.001) and show higher prevalence of DM (P = 0.001) and HTN (P = 0.001). Also, LA diameters (antero-posterior, transverse and longitudinal) and LA volumes (maximal and minimal) were increased (P < 0.001), but no difference in LA emptying fraction (P > 0.05). Systolic LA strain and left ventricular global longitudinal strain were significantly reduced in those patients (P value <0.001). Echocardiographic predictors of AF were LA systolic strain (P value <0.001) and LV global longitudinal strain (P value = 0.003). Cutoff value for systolic LA strain ≤23 had sensitivity 90.91% and specificity 93.33% in predicting POAF. While, left ventricular global longitudinal strain ≤−14.9% had sensitivity 63.6% and specificity 100.0% in predicting AF. Conclusion LA systolic strain and LV global longitudinal strain were significant predictors of POAF. Echocardiographic parameters can identify patients at greater risk of developing POAF who can benefit from preventive measure and guide the selection of prosthesis.
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Affiliation(s)
- Shinya Takahashi
- Department of Cardiovascular Surgery, Hiroshima University Hospital
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10
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Gokalp O, Eygi B, Besir Y, Gokalp G, Gurbuz A. Intraoperative Factors Cause Postoperative Atrial Fibrillation? Circ J 2016; 80:1052. [PMID: 26936238 DOI: 10.1253/circj.cj-15-1393] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Orhan Gokalp
- Department of Cardiovascular Surgery, Faculty of Medicine, Izmir Katip Celebi University
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Affiliation(s)
- David E Krummen
- University of California San Diego and VA San Diego Healthcare System
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12
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Yuasa T, Imoto Y. Usefulness of Tissue Doppler Imaging-Derived Atrial Conduction Time for Prediction of Atrial Fibrillation. Circ J 2016; 80:58-9. [DOI: 10.1253/circj.cj-15-1256] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Toshinori Yuasa
- Department of Cardiovascular Medicine and Hypertension, Graduate School of Medical and Dental Sciences, Kagoshima University
| | - Yutaka Imoto
- Department of Cardiovascular and Gastroenterological Surgery, Graduate School of Medical and Dental Sciences, Kagoshima University
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