Faculty Information - EJIMA KOICHIRO

（Last updated : 2022-08-17 13:54:51）

EJIMA KOICHIRO
Department School of Medicine(Tokyo Women's Medical University Hospital), School of Medicine Department of Internal Medicine, Division of Cardiology

Position Endowed Associate Professor

■ Published papers

1.	Original article	Left Ventricular Stimulation With Electrical Latency Predicts Mortality in Patients Undergoing Cardiac Resynchronization Therapy. 2021/06
2.	Original article	Life-Threatening Arrhythmia During Automated Atrial Capture Management Pacing 2021/03/13
3.	Original article	Feasibility of superior vena cava isolation in patients with cardiac implantable electronic devices. 2020/12
4.	Original article	Right atrial conduction time for predicting coexistent typical atrial flutter in patients with paroxysmal atrial fibrillation. 2020/06
5.	Original article	Comparison of high-power and conventional-power radiofrequency energy deliveries in pulmonary vein isolation using unipolar signal modification as a local endpoint. 2020/05
6.	Original article	Prognostic Implication of First-Degree Atrioventricular Block in Patients With Hypertrophic Cardiomyopathy. 2020/03
7.	Original article	Usefulness of Preprocedural Left Ventricular End-Systolic Volume Index and Early Diastolic Mitral Annular Velocity in Predicting Improvement in Left Ventricular Ejection Fraction Following Atrial Fibrillation Ablation in Patients With Impaired Left Ventricular Systolic Function. 2020/03
8.	Original article	Impedance drop predicts acute electrical reconnection of the pulmonary vein-left atrium after pulmonary vein isolation using short-duration high-power exposure. 2020/01
9.	Original article	Safety and efficacy of transvenous lead extractions for non-infectious superfluous leads in a Japanese population: A single-center experience. 2019/12
10.	Original article	Acute and Long-Term Outcomes of Transvenous Cardiac Pacing Device Implantation in Patients With Congenital Heart Disease 2019/10
11.	Original article	Current Status and Clinical Outcomes of Oral Anticoagulant Discontinuation After Ablation for Atrial Fibrillation in Japan　- Findings From the AF Frontier Ablation Registry. 2019/10
12.	Original article	Comparison Between Contact Force Monitoring and Unipolar Signal Modification as a Guide for Catheter Ablation of Atrial Fibrillation. 2019/08
13.	Other	Reply to the Editor- Augmenting speed of conduction to improve CRT. 2019/08
14.	Case report	Unusual dual-loop reentry during cavo-tricuspid isthmus-dependent atrial flutter. 2019/05
15.	Original article	Impact of a prolonged interatrial conduction time for predicting the recurrence of atrial fibrillation after circumferential pulmonary vein isolation of persistent atrial fibrillation. 2019/04
16.	Case report	Double ventricular capture by a single atrial extrastimulus during slow-fast atrioventricular nodal reentrant tachycardia. 2019/03
17.	Original article	Long-term clinical course after catheter ablation of atrial fibrillation in patients with hypertrophic cardiomyopathy. 2019/03
18.	Original article	Time interval from left ventricular stimulation to QRS onset is a novel predictor of nonresponse to cardiac resynchronization therapy. 2019/03
19.	Case report	Unique abdominal twiddler syndrome. 2019/02
20.	Case report	Targeting an epicardial-endocardial breakthrough in a case with an intractable common atrial flutter using ultra-high-resolution three-dimensional mapping. 2018/09
21.	Case report	Bradycardia cases with a good indication for Leadless Pacemaker in our early experience. 2018/07
22.	Original article	Narrowing filtered QRS duration on signal-averaged electrocardiogram predicts outcomes in cardiac resynchronization therapy patients with nonischemic heart failure. 2018/05
23.	Original article	Comparison of the Efficacy of Empiric Thoracic Vein Isolation for the Treatment of Paroxysmal and Persistent Atrial Fibrillation in Patients Without Structural Heart Disease. 2017/03
24.	Original article	Long-Term Efficacy of Implantable Cardioverter Defibrillator in Repaired Tetralogy of Fallot - Role of Anti-tachycardia Pacing. 2017/01
25.	Original article	Interatrial Conduction Time Can Predict New-Onset Atrial Fibrillation After Radiofrequency Ablation of Isolated, Typical Atrial Flutter. 2016/11
26.	Case report	Isolated cardiac sarcoidosis diagnosed by electroanatomic voltage mapping-guided endomyocardial biopsy combined with magnetic resonance imaging and positron emission tomography 2016/10
27.	Original article	Implantable cardioverter defibrillator therapy and sudden death risk stratification in hypertrophic cardiomyopathy patients with midventricular obstruction: A single-center experience. 2016/07
28.	Original article	Correlation between left atrial appendage morphology and flow velocity in patients with paroxysmal atrial fibrillation. 2016/01
29.	Case report	Catheter ablation of atrial fibrillation in patients with severely impaired left ventricular systolic function 2016
30.	Original article	Impact of an Empiric Isolation of the Superior Vena Cava in Addition to Circumferential Pulmonary Vein Isolation on the Outcome of Paroxysmal Atrial Fibrillation Ablation. 2015/12
31.	Case report	Incessant bundle branch reentrant ventricular tachycardia in a patient with corrected transposition of the great arteries 2015/11
32.	Original article	Left Atrial Appendage Flow Velocity and Time from P-Wave Onset to Tissue Doppler-Derived A' Predict Atrial Fibrillation Recurrence after Radiofrequency Catheter Ablation. 2015/07
33.	Original article	Catheter ablation of atrial fibrillation in patients with severely impaired left ventricular systolic function 2015/01
34.	Original article	Catheter ablation of atrial fibrillation in patients with severely impaired left ventricular systolic function. 2015
35.	Case report	Catheter ablation of ventricular tachycardia associated with cardiac sarcoidosis: Targeting a low-voltage area with strict voltage criteria. 2014/10
36.	Original article	Long-term outcome and preprocedural predictors of atrial tachyarrhythmia recurrence following pulmonary vein antrum isolation-based catheter ablation in patients with non-paroxysmal atrial fibrillation. 2014/07
37.	Case report	Unusual "ratchet syndrome": spontaneous lead retraction after a generator exchange. 2014/07
38.	Original article	Impact of atrial remodeling on the outcome of radiofrequency catheter ablation of paroxysmal atrial fibrillation. 2014/04
39.	Case report	Left brachiocephalic vein occlusion in a patient with an aortic arch aneurysm: Rare cause of obstraction for a pacemaker implantation 2014/01
40.	Original article	Left Atrial Appendage Flow Velocity and Time from P-Wave Onset to Tissue Doppler-Derived A' Predict Atrial Fibrillation Recurrence after Radiofrequency Catheter Ablation. 2014
41.	Original article	Impact of diastolic dysfunction on the outcome of catheter ablation in patients with atrial fibrillation 2013/03
42.	Case report	Localized reentrant tachycardia in the aorta contiguity region mimicking perimitral atrial flutter in the context of atrial fibrillation ablation 2013/01
43.	Review article	Ratchet syndrome 2012/04
44.	Other	Renal Dysfunction, Recovery Time Dispersion and Ventricular Arrhythmias in Heart Failure Patients Receiving Cardiac Resynchronization Therapy Defibrillator 2011/09
45.	Other	Can sleep-dusirdered breathing be an independent predictor oif malignant ventricular arrhythmias in patients with heart failure? 2010
46.	Original article	Gender difference in arrhythmic occurrences in patients with nonischemic dilated cardiomyopathy and implantable cardioverter-defibrillator 2010
47.	Other	Image Integration of Three-dimensional Cone-beam Computed Tomography Angiogram into Electroanatomical Mapping System to Guide Catheter Ablation of Atrial Fibrillation 2010
48.	Other	Impact of appropriate shock therapy in nonischemic heart failure patients with prophylactic implantable cardioverter defibrillator 2010
49.	Other	Impact of renal dysfunction on mortality in heart failure patients receiving cardiac resynchronization therapy 2010
50.	Other	Medical and Surgical Management of Adult Atrial Septal Defect Early and Late Results of Catheter Ablation of Atrial Tachycardia Occurring Late after Surgical Closure of Atrial Septal Defects 2010
51.	Other	ML Tip and tricks for pacing device implantation Morning lecture 28 2010
52.	Case report	Silent obstruction of SVC with collateral circulation after cardioverter defibrillator implantation. 2010
53.	Original article	Successful Catheter Ablation and Documentation of the Activation and Propagation Pattern During a Left Atrial Focal Tachycardia in a Patient with Cor Triatriatum Sinister. 2010
54.	Other	Wireless remote monitoring of the arrhythmia using implantable pacing devices 2010
55.	Case report	Left ventricular pseudoaneurysm following a "POP" phenomenon 2008
56.	Original article	Bi-focal Atrial Tachycardia Mimicking Atrial Fibrillation: Fusion and Interference Between Two Distinct Tachycardias 2007
57.	Original article	Silent Pulmonary Artery Dissection in a Patient With Eisenmenger Syndrome Due to Ventricular Septal Defect: A Case Report 2005
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■ Academic conference presentation

1.	Impact of early improvement in the left ventricular systolic function on the long-term prognosis in patients undergoing atrial fibrillation ablation 2019/10/25
2.	Successful Coronary Vein Lead Implantation by Intravascular Ultrasound Guidance in a Patient with Life-Threatening Contrast Medium Anaphyraxis 2019/10/24
3.	Clinical and Procedural Features of Left Ventricular Lead Extraction in Patients with Cardiac Resynchronization Therapy 2019/07/27
4.	Catheter Ablation of Atrial Fibrillation in Patients with a Persistent Left Superior Vena Cava 2019/07/26
5.	Comparison between Contact Force Monitoring and Unipolar Signal Modification as a Guide for Catheter Ablation of Atrial Fibrillation: A Prospective Multi-Center Randomized Controlled Study 2019/07/26
6.	Catheter Ablation for Treatment of Atrial Fibrillation in Adults with Complex Congenital Heart Disease: A Multicenter Registry 2019/07/25
7.	Efficacy and Safety of High-Power RF Ablation for Pulmonary Vein Isolation: A Comparative Study with Conventional RF Ablation 2019/07/25
8.	Preventive lead extraction and replacement for lead's extension accompanying somatic growth in child underwent transvenous pacemaker implantation 2019/07/25
9.	The Long-term Result of Left Ventricular Ejection Fraction after Atrial Fibrillation Ablation in Patients with Impaired Left Ventricular Systolic Function 2019/03/29
10.	Comparison Between Contact Force Monitoring and Unipolar Signal Modification as a Guide for Catheter Ablation of Atrial Fibrillation : A Prospective Multi-Center Randomized Study 2019/03/17
11.	The impact of the mitral annular velocity on the outcome following multiple atrial fibrillation ablation sessions 2019/03/17
12.	Catheter ablation of atrial fibrillation in heart failure with reduced ejection fraction 2018/10/11
13.	Association between Heart Valve Calcification and Atrial Fibrillation Recurrence after Catheter Ablation 2018/07/13
14.	Comparison of Patient Background and Clinical Outcome between Infection and Noninfection Indication for Percutaneous Lead Extraction 2018/07/13
15.	The Role of Local Conduction Disturbance Around the Left Ventricular Pacing Site to Predict Clinical Outcome in Patients with Cardiac Resynchronization Therapy 2018/07/13
16.	Impact of nutritional status on heart failure hospitalization and mortality in nonischemic patients with implantable cardioverter defibrillator 2018/05/26
17.	Impact of a Prolonged Interatrial Conduction Time for Predicting Atrial Fibrillation Recurrence after Radiofrequency Catheter Ablation of Persistent Atrial Fibrillation 2018/03/24
18.	Impact of an Empiric Superior Vena Cava Isolation in Addition to Circumferential Pulmonary Vein Isolation for Persistent Atrial Fibrillation Ablation 2018/03/24
19.	Impact of Nutritional Status on Heart Failure Hospitalization and Mortality in Patients with Implantable Cardioverter Defibrillator 2018/03/24
20.	Pre-procedural Left Ventricular Diastolic Function Predicts the Recovery of the Left Ventricular Systolic Function after Catheter Ablation of Atrial Fibrillation 2018/03/24
21.	Impact of Nutritional Status on Mortality in Patients with Cardiac Resynchronization Therapy 2018/03/23
22.	Long-term Clinical Benefits of Catheter Ablation for Atrial Fibrillation in Patients with Hypertrophic Cardiomyopathy 2018/03/23
23.	Predictive Value of Total Atrial Conduction Time Estimated with Tissue Doppler Imaging for Predicting Atrial Fibrillation Recurrence after Catheter Ablation 2018/03/23
24.	Predictive value of the total atrial conduction time estimated with tissue Doppler imaging for predicting atrial tachyarrhythmia recurrences after catheter ablation 2018/03/19
25.	Local conduction delay around the left ventricular pacing site is a novel predictor of non-responder to cardiac resynchronization therapy 2017/08/29
26.	Short-term prevalence of fatal ventricular arrhythmic events in patients with newly diagnosed reduced left ventricular ejection fraction 2017/08/29
27.	Comparison of the efficacy of empiric thoracic vein isolation for the treatment of paroxysmal and persistent atrial fibrillation in patients without structural heart disease 2017/06/19
28.	Comparison of the efficacy of empiric thoracic vein isolation for the treatment of paroxysmal and persistent atrial fibrillation in patients without structural heart disease 2017/06/19
29.	Problematic extraction of leadless cardiac pacemaker after one-year implantation 2017/05/12
30.	Changes and predictive value of filtered QRS duration for mortality in non-ischemic heart failure patients with cardiac resynchronization therapy 2017/04/30
31.	Blood Urea Nitrogen to Albumin Ratio Predicts Mortality of Heart Failure Patients with Cardiac Resynchronization Therapy 2017/03/19
32.	Comparison of the Efficacy of Thoracic Vein Isolation for Paroxysmal and Persistent Atrial Fibrillation in Patients without Structural Heart Disease 2017/03/19
33.	Comparison of Catheter Ablation of Atrial Fibrillation between Patients with and without Atrial Septal Defects: A Propensity Score Matched Analysis 2017/03/18
34.	Initial Experiences of Subcutaneous Implantable Cardioverter Defibrillators in Japan: Can the Subcutaneous Device Replace the Transvenous Defibrillator? 2017/03/18
35.	Impact of Rapid Ventricular Tachycardia Stability on the Effectiveness of Antitachycardia Pacing Therapy before Defibrillation 2017/03/17
36.	Incidence of Implantable Cardioverter-Defibrillator Lead Failure in Younger Age 2017/03/17
37.	Long-Term Recovery of Left Ventricular Ejection Fraction in Heart Failure Patients with Primary Prevention Implantable Cardioverter Defibrillator 2017/03/17
38.	Predictors of 1-year Mortality among Japanese Patients with Infected Cardiac Implantable Electrical Device Undergoing Lead Extraction 2017/03/17
39.	Short-term Prevalence of Fatal Ventricular Arrhythmic Event in Patients with Newly-diagnosed Reduced Ejection Fraction 2017/03/17
40.	Short-term Prevalence of Fatal Ventricular Arrhythmic Event in Patients with Newly-diagnosed Reduced Ejection Fraction 2016/10/08
41.	A novel indication of cardiac resynchronization therapy without cardioversion and defibrillation 2016/08/30
42.	Electrocardiographic risk stratification of electrical storm in non-ischemic heart failure patients with cardiac resynchronization 2016/08/30
43.	A novel indication of cardiac resynchronization therapy without cardioversion and defibrillation 2016/07/16
44.	Comparison of outcomes in patients received cardiac resynchronization therapy with and without defibrillator: a propensity-score adjusted analysis 2016/07/16
45.	Effect of palliative surgery for infected cardiac implantable electrical device on the results of lead extraction 2016/07/16
46.	Predictive value of the total atrial conduction time estimated with tissue Doppler imaging for predicting atrial fibrillation recurrence after a repeat radiofrequency catheter ablation 2016/07/16
47.	Electrocardiographic Risk Stratification of Electrical Storm in Heart Failure Patients with Cardiac Resynchronization 2016/03/19
48.	Prognostic Role of Atrial Tachyarrhythmias in Arrhythmogenic Right Ventricular Cardiomyopathy/Dysplasi 2016/03/19
49.	Efficacy of pulmonary vein isolation for atrial fibrillation in patients with atrial septal defect 2016/01/29
50.	Targeted Endomyocardial Biopsy Guidedby Electroanatomical Voltage Mapping in Patients with Suspected Cardiac Sarcoidosis. 2015/09/20
51.	Targeted Endomyocardial Biopsy Using Electroanatomical Voltage Mapping for Patients Suspected of Cardiac Sarcoidosis 2015/04/26
52.	Coexistent bundle branch reentrant ventricular tachycardia and atrial tachycardia in patients with corrected transposition of the great arteries. 2015/01/18
53.	Outcome of ablation for supraventricular tachycardia in adults underwent Fontan operation 2015/01/17
54.	A Comparison Between Left Appendage Morphologies on Left Appendage Flow Velocity in Patients with Atrial Fibrillation. 2014/11/19
55.	Persistent iatrogenic atrial septal defect detected during the second ablation procedure for atrial fibrillation. 2014/11/01
56.	Predictive Value of Pulmonary Capillary Wedge Pressure for Heart Failure Hospitalization in Heart FPatients with Cardiac Resynchronization Therapy. 2014/10/12
57.	Targeted endomyocardial biopsy using electroanatomical voltage mapping for patients suspected of cardiac sarcoidosis. 2014/09/02
58.	Impact of systolic and diastolic dysfunction on the outcome of catheter ablation in patients with atrial fibrillation. 2014/09/01
59.	Proarrhythmic effect of cardiac resynchronization therapy and transmural dipersion in patients with nonischemic heart failure. 2014/08/30
60.	Association between heart and ventricular arrhythmias in non-ischemic heartfailure patients receving implantable cardioverter defibrillators. 2014/05/17
61.	Association between heart rate and ventricular arrhythmias in non-ischemic heart failure patients receiving implantable cardioverter defibrillator. 2014/05/17
62.	Innovative Remote Interrogation Technology for the Better Management of Patients with Cardiac Implantable Pacing Devices 2014/03/23
63.	A Novel Echocardiographic Parameter for the Electrical Remodeling can Predict the Recurrence of Atrial Fibrillation after Catheter Ablation 2014/03/21
64.	Changes and Predictive Value of QRS Duration for Mortality in Heart Failure Patients with Cardiac Resynchronization Therapy 2014/03/21
65.	Efficacy of Repeat Circumferential Pulmonary Vein Isolation without Empiric Linear Ablation in Patients with Recurrent Atrial Fibrillation 2013/10/03
66.	Catheter Ablation of Ventricular Tachycardia Associated with Cardiac Sarcoidosis Targeting a Low-Voltage Area withStrict Voltage Criteria 2013/07/06
67.	Effectiveness of Radiofrequency Catheter Ablation with Antiarrhythmic Drug Therapy for Atrial Fibrillation in Patients with Severely Impaired Left Ventricular Systolic Function 2013/07/06
68.	Late "Ratchet Syndrome" Spontaneous LeadRetraction after a Generator Exchange 2013/07/06
69.	Management and Prognosis of CIED Infection Patient withNon-Extracted Lead 2013/07/06
70.	Unusual Cause Obstructing a Pacemaker Implantation 2013/07/06
71.	Circumferential Pulmonary Vein Isolation as a Bail-Out Strategy for Drug-Refractory Atrial Fibrillation Causing Hemodynamic Instability in a Patient with Acure Heart Failure 2013/07/05
72.	Long-Term Efficacy of Catheter Ablation of Atrial Fibrillation in Patients with Hypertrophic Cardiomyopathy 2013/07/05
73.	Long-Term Efficacy of Circumferential Pulmonary Vein Isolation without Additional Substrate Modification in Patients withNon-Paroxysmal Atrial Fibrillation 2013/07/05
74.	Predictors of Atrial Tachyarrhythmia Recurrence after a Single Catheter Ablation Procedure for Paroxysmal Atrial Fibrillation without Structural Heart Disease 2013/07/05
75.	The Importance of Early Detection and Early Intervention for Ventricular Tachyarrhythmia by Remote Monitoring in the Era of Shock Reduction 2013/07/05
76.	Effect of persistent renal impairment on mortality in cardiac resynchronization therapy patients with nonischemic heart failure 2013/05/27
77.	The Effectiveness of Remote Monitoring System for Early Detection and Early Intervention of Defibrillator Device Therapy for Tachy-arrhythmia 2013/03/17
78.	ICD therapy for ventricular tachycardia and sudden death in adults with congenital heart disease 2013/01/20
79.	Tpeak-tend dispersion and the occurrence of ventricular tachyarrhythmia in nonischemic heart failure patients receiving cardiac resynchronization therapy 2012/08/27
80.	Catheter Ablation and Defibrillator Device Therapy of Tachy-arrhythmias in Adult Patients with Congenital Heart Disease Long after the Surgical Repair 2012/03/18
81.	Usefulness of Wireless Remote Monitoring of CRT-D for Better Management of Heart Failure 2012/03/16
82.	Evaluation of the feasibility of wireless remote monitoring in patients with pacemakers 2011/09/22
83.	The predictors of venous obstruction following cardiac electronic device implantation 2011/09/21
84.	Efficacy of Cacheter Ablation of Atrial Fibrillation in Patients with Hypertrophic Cardiomyopathy 2011/09/19
85.	Impact of immediate Recurrence of Atrial Fibrillation After Ablation on Long-Term Outcome 2011/09/19
86.	Three-Dimensional Low-dose Dobutamine Stress Echocardiography Predicts Left Ventricular Reverse Remodeling after Cardiac Resynchronization Therapy 2011/08/03
87.	Remote Monitoring Systems are Indispensable for the Management of the Patients with the Cardiac Pacing Devices 2011/03/20
88.	Clinical Phases Vary with Time Course in Arrhythmogenic Right Ventricular Cardiomyopathy/Dysplasia 2011/03/19
89.	Prognostic Implications of Diagnostic Criteria for Arrhythmogenic Right Ventricular Cardiomyopathy/Dysplasia: Long Term Follow Up at a Tertiary Hospital in Japan 2011/03/19
90.	Lead Removal of Cardiac Pacing Devices in the Laser Lead-Extraction Era;Single Center Experiences 2011/03/18
91.	The Model for End-Stage Liver Disease Score as an Independent Predictor of Outcomes in Cardiac Resynchronization Therapy 2011/03/18
92.	Effectiveness of Band-pass Filter Optimization to Avoid Ventricular Sensing Failure by Novel Implantable Cardioverter Defibrillators 2009/11
93.	Successful left atrial pacing in a patient with persistent atrial septal defect and severe conduction block in the right artrium 2009/10
94.	Recovery time dispersion and arrhythmic event in ischemic heart failure patients with cardiac resynchronization therapy device 2009/06
95.	Image intergration of 3D cone-beam computed tomography angiogram into electroanatomical mapping system to guide catheter ablation of atrial bibrillation :is it the ideal imaging source for image integration 2009/05
96.	Placement of an ICD lead through a small innominate vein identified by a selective retrograde venogram in a case with a persistent left superior vena cava 2009/05
97.	Targeted endomyocardial biopsy using electroanatomical voltage mapping in the early stage of arrhythmogenic right ventricular cardiomyopathy 2009/05
98.	Can Thoracic Impedance Measurement Using a Novel CRT-D Device Predict Aggravation of Heart Failure?) 2009/03
99.	Clinical Significance of Electrical Storm after Initiation of Cardiac Resynchronization Therapy) 2009/03
100.	Limitations on Japanese Localization of a Web-based Remote Monitoring System for Cardiac Pacing Devices: Problems of the Telephone) 2009/03
101.	Noncontact Mapping and Catheter Ablation of Atrial Tachycardia in Patients Late after Intra-cardiac Repair for Complex Congenital Heart Disease) 2009/03
102.	Recovery Time Dispersion and Arrhythmic Event in Patients with Cardiac Resynchronization Therapy Device) 2009/03
103.	The Clinical Utility of Defibrillation Waveform Optimization) 2009/03
104.	The Initial Experience of Transvenous Leads Extraction Assisted by the Excimer Laser System) 2009/03
105.	The Nobel Image Integration of DynaCT Image into Three-Dimensional Electroanatomical Mapping Using CARTO MERGE) 2009/03
106.	Transesophageal Echocardiographic Evaluation of the Pulmonary Vein ,PV) Contraction: Implication of the Evaluation for PV Reconnection following AF Ablation) 2009/03
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■ Academic society memberships

1.		Japanese Circulation Society
2.		Japanese Society of Internal Medicine

■ Education

1.	2006/07/21 Degree Acquisition	Tokyo Women's Medical University,
2.	1991/04～1997/03	Faculty of Medicine, Jikei University, Graduated,