Full Text Journal Articles by
Author Ritsushi Kato

Advertisement

Find full text journal articles






Differential Atrial Pacing to Detect Reconnection Gaps After Pulmonary Vein Isolation in Atrial Fibrillation.

Mai Tahara, Ritsushi Kato, Yoshifumi Ikeda, Koji Goto, So Asano, Hitoshi Mori, Shiro Iwanaga, Toshihiro Muramatsu, Kazuo Matsumoto,

High-resolution mapping is useful to identify reconnection gaps in the pulmonary vein after pulmonary vein isolation for atrial fibrillation. However, it is sometimes difficult to differentiate pulmonary vein potentials from far-field potentials because of very low amplitudes. Our purpose was to evaluate the usefulness of a novel differential atrial pacing ... Read more >>

Int Heart J (International heart journal)
[2020, 61(3):503-509]

Cited: 0 times

View full text PDF listing >>



Impact of high-density mapping on outcome of the second ablation for atrial fibrillation.

Yoshifumi Ikeda, Ritsushi Kato, Hitoshi Mori, Kenta Tsutsui, Koji Goto, Takahiko Nagase, Sayaka Tanaka, Sou Asano, Mai Tawara, Midori Yukino, Saki Hasegawa, Shintaro Nakano, Shiro Iwanaka, Toshihiro Muramatsu, Kazuo Matsumoto,

PURPOSE:Identification of a conduction gap between the left atrium and pulmonary vein (LA-PV gap) and the circuit of atrial tachycardia after pulmonary vein isolation (PVI) is an important process during the second ablation for atrial fibrillation (AF). The high-density mapping system RHYTHMIA® is useful for identification of an LA-PV gap ... Read more >>

J Interv Card Electrophysiol (Journal of interventional cardiac electrophysiology : an international journal of arrhythmias and pacing)
[2020, :]

Cited: 0 times

View full text PDF listing >>



Advertisement

Percutaneous Simple Lead Traction Is a Feasible and Effective Method for Right Ventricular Lead Perforations.

Hitoshi Mori, Ritsushi Kato, Yoshifumi Ikeda, Kenta Tsutsui, Saki Hasegawa, Sayaka Tanaka, Shiro Iwanaga, Shintaro Nakano, Toshihiro Muramatsu, Naokata Sumitomo, Kazuo Matsumoto,

Right ventricular (RV) lead perforations are relatively rare but a potentially life-threatening complication of surgical implantations of cardiac implantable electronic devices (CIEDs). The result of percutaneous simple lead traction after lead perforations in the Japanese population has not been well clarified.We retrospectively studied 1359 patients (pacemakers [PMs], 973 patients; implantable ... Read more >>

Int Heart J (International heart journal)
[2020, 61(1):54-59]

Cited: 0 times

View full text PDF listing >>



Ultra-high density mapping of intra-atrial reentrant tachycardia in a patient after a lateral tunnel total cavopulmonary connection.

Hitoshi Mori, Naokata Sumitomo, Shota Muraji, Noriyuki Iwashita, Toshiki Kobayashi, Ritsushi Kato,

We report a case of an 18-year-old male with a postsurgical lateral tunnel (LT) total cavopulmonary connection (TCPC) and supraventricular tachycardia (SVT). Patients after an LT TCPC have complicated suture lines and a considerable area of damaged myocardium in the LT, which could become a complex arrhythmogenic substrate of tachycardias. ... Read more >>

J Arrhythm (Journal of arrhythmia)
[2019, 35(6):848-850]

Cited: 0 times

View full text PDF listing >>



Influence of various energy settings and overlap ratios on size and continuity of lesions in a laser balloon ablation in vitro model.

Takahiko Nagase, So Asano, Midori Yukino, Hitoshi Mori, Koji Goto, Yoshifumi Ikeda, Shiro Iwanaga, Toshihiro Muramatsu, Hisamitsu Mukaida, Ritsushi Kato, Kazuo Matsumoto,

INTRODUCTION:The influence of power (Watt [W]) and total energy (Joule [J]) on lesion size and the optimal overlap ratio remain unclear in laser balloon (LB) ablation for atrial fibrillation. We aimed to evaluate lesion size and visible gaps after LB ablation with various energy settings and different overlap ratios in ... Read more >>

J. Cardiovasc. Electrophysiol. (Journal of cardiovascular electrophysiology)
[2019, 30(8):1330-1338]

Cited: 0 times

View full text PDF listing >>



Relationship between the ablation index, lesion formation, and incidence of steam pops.

Hitoshi Mori, Ritsushi Kato, Naokata Sumitomo, Yoshifumi Ikeda, Koji Goto, Sayaka Tanaka, So Asano, Mai Tahara, Takahiko Nagase, Shiro Iwanaga, Toshihiro Muramatsu, Kazuo Matsumoto,

Background:The ablation index (AI) is reported to be useful for a durable pulmonary vein isolation (PVI). However, there have been no studies investigating the relationship between the power, contact force (CF), AI, and steam pops. Methods:Using an in vitro model, ablation energy was delivered until a steam pop occurred and ... Read more >>

J Arrhythm (Journal of arrhythmia)
[2019, 35(4):636-644]

Cited: 0 times

View full text PDF listing >>



Migraine-like Headache after Transseptal Puncture for Catheter Ablation: A Case Report and Review of the Literature.

Yuji Kato, Takeshi Hayashi, Ritsushi Kato, Masaki Takao,

Catheter ablation for atrial fibrillation creates an iatrogenic atrial septal defect by transseptal puncture, which may produce a transient right-to-left shunt. We encountered a 44-year-old man who presented with de novo migraine-like headache after cryoballoon ablation for atrial fibrillation. On reviewing the literature, we found additional cases in which migraine-like ... Read more >>

Intern. Med. (Internal medicine (Tokyo, Japan))
[2019, 58(16):2393-2395]

Cited: 0 times

View full text PDF listing >>



Phrenic nerve injury contemporaneous with acute decrease in compound motor action potential during laser balloon pulmonary vein isolation for atrial fibrillation.

Takahiko Nagase, So Asano, Koji Goto, Yoshifumi Ikeda, Ritsushi Kato, Kazuo Matsumoto,

HeartRhythm Case Rep (HeartRhythm case reports)
[2019, 5(2):83-87]

Cited: 0 times

View full text PDF listing >>



Safety and accuracy of the Rhythmia mapping system in pediatric patients.

Hitoshi Mori, Shota Muraji, Naokata Sumitomo, Ritsushi Kato, Tomohiko Imamura, Akiko Komori, Noriyuki Iwashita, Toshiki Kobayashi, Kazuo Matsumoto,

BACKGROUND:A new mapping system (Rhythmia) using a 64 mini-electrode small basket array (Orion) was developed that enables rapid high-density mapping in a short time. However, there are few reports about the usefulness of this system in pediatric cases. OBJECTIVE:The purpose of this study was to investigate the safety and accuracy ... Read more >>

Heart Rhythm (Heart Rhythm)
[2019, 16(3):388-394]

Cited: 0 times

View full text PDF listing >>



Analysis of the heart rate variability during cryoballoon ablation of atrial fibrillation.

Hitoshi Mori, Ritsushi Kato, Yoshifumi Ikeda, Koji Goto, Sayaka Tanaka, So Asano, Yuichiro Shiki, Takahiko Nagase, Shiro Iwanaga, Shigeyuki Nishimura, Toshihiro Muramatsu, Kazuo Matsumoto,

Aims:Vagal responses such as marked bradycardia or a rapid blood pressure decrease are often observed during pulmonary vein (PV) isolation of atrial fibrillation (AF) using a cryoballoon (CB). However, the relationship between the marked vagal response and change in the heart rate variability (HRV) as a marker of the autonomic ... Read more >>

Europace (Europace : European pacing, arrhythmias, and cardiac electrophysiology : journal of the working groups on cardiac pacing, arrhythmias, and cardiac cellular electrophysiology of the European Society of Cardiology)
[2018, 20(8):1259-1267]

Cited: 1 time

View full text PDF listing >>



Successful demonstration of the detailed connection between the twin atrioventricular nodes and sling in a patient with asplenia syndrome.

Hitoshi Mori, Naokata Sumitomo, Syota Muraji, Tomohiko Imamura, Toshiki Kobayashi, Ritsushi Kato,

HeartRhythm Case Rep (HeartRhythm case reports)
[2018, 4(10):480-483]

Cited: 0 times

View full text PDF listing >>



The influence of the electrodes spacing of a mapping catheter on the atrial voltage substrate map.

Hitoshi Mori, Ritsushi Kato, Yoshifumi Ikeda, Koji Goto, Sayaka Tanaka, So Asano, Yuichiro Shiki, Takahiko Nagase, Mai Tahara, Shiro Iwanaga, Toshihiro Muramatsu, Kazuo Matsumoto,

BACKGROUND:Detailed substrate mapping is important for catheter ablation. However, the influence of the electrode spacing of the mapping catheter on the substrate map has not been well clarified. The aim of this study was to investigate the influence of the electrode spacing of the mapping catheter on the voltage of ... Read more >>

J Cardiol (Journal of cardiology)
[2018, 72(5):434-442]

Cited: 0 times

View full text PDF listing >>



Low Risk of Pulmonary Vein Stenosis After Contemporary Atrial Fibrillation Ablation - Lessons From Repeat Procedures After Radiofrequency Current, Cryoballoon, and Laser Balloon.

Takahiko Nagase, Stefano Bordignon, Laura Perrotta, Fabrizio Bologna, Felix K Weise, Athanasios Konstantinou, Ritsushi Kato, Boris Schmidt, Julian K R Chun,

BACKGROUND:The incidence of pulmonary vein stenosis (PVS) after AF ablation following contemporary procedures remains unclear. We compared the incidence of PVS/narrowing (PVS/N) after PV isolation (PVI) for (1) 3-D mapping-guided wide-area encircling irrigated radiofrequency current (RFC) ablation; (2) first-third-generation big cryoballoon (CB1-3) ablation; and (3) laser balloon (LB) ablation.Methods and Results:All patients ... Read more >>

Circ. J. (Circulation journal : official journal of the Japanese Circulation Society)
[2018, 82(6):1558-1565]

Cited: 3 times

View full text PDF listing >>



Clinical Usefulness of Wearable Cardioverter Defibrillator (WCD) and Current Understanding of Its Clinical Indication in Japan.

Shinichi Niwano, Yukio Sekiguchi, Yosuke Ishii, Yuki Iwasaki, Ritsushi Kato, Hideo Okamura, Masahiko Takagi, Takashi Kurita, Takashi Nitta,

Prevention of sudden cardiac death (SCD) has become an important issue in today's cardiovascular field, together with various developments in secondary prevention of basic cardiac diseases. The importance of the implantable cardioverter defibrillator (ICD) is now widely accepted because it has exhibited significant improvement in patients' prognoses in ischemic and ... Read more >>

Circ. J. (Circulation journal : official journal of the Japanese Circulation Society)
[2018, 82(6):1481-1486]

Cited: 1 time

View full text PDF listing >>



Ischemic Stroke with Cardiac Pacemaker Implantation: Comparison of Physiological and Ventricular Pacing Modes.

Yuji Kato, Takeshi Hayashi, Ritsushi Kato, Norio Tanahashi, Masaki Takao,

The clinical characteristics of ischemic stroke in patients with a pacemaker (PM) are not well understood.Forty-six ischemic stroke patients with a PM were investigated retrospectively, and the impact of different pacing modes was compared.The patients were divided into a physiological pacing group (n = 22) and a ventricular pacing group (n = 24). The ... Read more >>

J Stroke Cerebrovasc Dis (Journal of stroke and cerebrovascular diseases : the official journal of National Stroke Association)
[2017, 26(9):1948-1952]

Cited: 0 times

View full text PDF listing >>



AF Sustained in Only a Small Area of SVC.

Takahiko Nagase, Ritsushi Kato, So Asano, Kazuo Matsumoto,

Intern. Med. (Internal medicine (Tokyo, Japan))
[2017, 56(16):2239-2240]

Cited: 1 time

View full text PDF listing >>



Atypical Fast-Slow Atrioventricular Nodal Reentrant Tachycardia Incorporating a "Superior" Slow Pathway: A Distinct Supraventricular Tachyarrhythmia.

Yoshiaki Kaneko, Shigeto Naito, Kaoru Okishige, Itsuro Morishima, Takeshi Tobiume, Tadashi Nakajima, Tadanobu Irie, Masaki Ota, Takafumi Iijima, Takashi Iizuka, Mio Tamura, Shuntaro Tamura, Akihiro Saito, Osamu Igawa, Ritsushi Kato, Kazuo Matsumoto, Fumio Suzuki, Masahiko Kurabayashi,

The existence of an atypical fast-slow (F/S) atrioventricular nodal reentrant tachycardia (AVNRT) including a superior (sup) pathway with slow conductive properties and an atrial exit near the His bundle has not been confirmed.We studied 6 women and 2 men (age, 74 ± 7 years) with sup-F/S-AVNRT who underwent successful radiofrequency ... Read more >>

Circulation (Circulation)
[2016, 133(2):114-123]

Cited: 5 times

View full text PDF listing >>



Prediction of improvement in left atrial function index after catheter ablation for atrial fibrillation.

Takahiko Nagase, Ritsushi Kato, Shintaro Nakano, Yuichirou Shiki, Sayaka Tanaka, Yoshifumi Ikeda, Shiro Iwanaga, Shigeyuki Nishimura, Kazuo Matsumoto,

Although left atrial function index is reportedly a possible predictor of hospitalization for heart failure and of stroke irrespective of the presence or not of atrial fibrillation (AF), the effects of catheter ablation on left atrial function index have not yet been reported.We performed catheter ablation on 55 patients (age ... Read more >>

J Interv Card Electrophysiol (Journal of interventional cardiac electrophysiology : an international journal of arrhythmias and pacing)
[2015, 44(2):151-160]

Cited: 4 times

View full text PDF listing >>



Left atrial appendage wall-motion velocity associates with recurrence of nonparoxysmal atrial fibrillation after catheter ablation.

Miyuki Ariyama, Ritsushi Kato, Makoto Matsumura, Harumi Yoshimoto, Yoshie Nakajima, Shintaro Nakano, Takatoshi Kasai, Jun Tanno, Takaaki Senbonmatsu, Kazuo Matsumoto, Shigeyuki Nishimura,

Catheter ablation (CA) for nonparoxysmal atrial fibrillation (AF) is controversial due to its high recurrence rate. The aim of this study was to assess retrospectively the diagnostic value of preprocedural left atrial appendage (LAA) wall-motion velocity in predicting recurrence of AF within 1 year after CA. We hypothesized that tissue ... Read more >>

Echocardiography (Echocardiography (Mount Kisco, N.Y.))
[2015, 32(2):272-280]

Cited: 2 times

View full text PDF listing >>



Catheter ablation for atrial fibrillation results in greater improvement in cardiac function in patients with low versus normal left ventricular ejection fraction.

Zekeriya Kucukdurmaz, Ritsushi Kato, Alim Erdem, Ebru Golcuk, Takeshi Tobiume, Takahiko Nagase, Yoshifumi Ikeda, Yoshie Nakajima, Makoto Matsumura, Nobuyuki Komiyama, Shigeyuki Nishimura, Kazuo Matsumoto,

It is still unknown whether left ventricular ejection fraction (LVEF) might affect the magnitude of improvement after atrial fibrillation (AF) ablation on cardiac function in persistent or longstanding persistent AF (CAF) patients.We performed echocardiography in 35 patients with CAF before and after catheter ablation (CA). Patients were stratified by LVEF ... Read more >>

J Interv Card Electrophysiol (Journal of interventional cardiac electrophysiology : an international journal of arrhythmias and pacing)
[2013, 37(2):179-187]

Cited: 7 times

View full text PDF listing >>



Cardiac autonomic function in metabolic syndrome: a comparison of ethnic Turkish and Japanese patients.

Alim Erdem, Masahiro Uenishi, Kazuo Matsumoto, Zekeriya Küçükdurmaz, Ritsushi Kato, Safak Sahin, Mehmet Yazıcı,

Metabolic syndrome (MetS) prevalence shows some differences at various regions of the world in terms of race and ethnicity. The cardiac autonomic functions between Turkish and Japanese MetS patients with heart rate turbulence (HRT) and heart rate variability (HRV) were compared as the aim of this study.This study consists of ... Read more >>

J Interv Card Electrophysiol (Journal of interventional cardiac electrophysiology : an international journal of arrhythmias and pacing)
[2012, 35(3):253-258]

Cited: 2 times

View full text PDF listing >>



Cardiac autonomic function measured by heart rate variability and turbulence in pre-hypertensive subjects.

Alim Erdem, Masahiro Uenishi, Zekeriya Küçükdurmaz, Kazuo Matsumoto, Ritsushi Kato, Motoki Hara, Mehmet Yazıcı,

Non-dipping blood pressure pattern was shown to be associated with increased cardiovascular events. In addition, cardiac autonomic dysfunction was found to be associated with non-dipper phenomenon. In this study, we aimed to evaluate the cardiac autonomic functions in dipper and non-dipper pre-hypertensive subjects. A total of 65 pre-hypertensive subjects were ... Read more >>

Clin. Exp. Hypertens. (Clinical and experimental hypertension (New York, N.Y. : 1993))
[2013, 35(2):102-107]

Cited: 5 times

View full text PDF listing >>



Novel method to evaluate the conduction velocity and conducting area during isthmus-dependent atrial flutter.

Alim Erdem, Ebru Gölcük, Zekeriya Küçükdurmaz, Ritsushi Kato, Motoki Hara, Takeshi Tobiume, Hitoshi Ishida, Masahiro Uenishi, Yurika Ishizuka, Nobuyuki Komiyama, Shigeyuki Nishimura, Kazuo Matsumoto,

OBJECTIVE: The difference of the conduction velocity (CV) around the tricuspid valve annulus between the counter-clockwise (CCW) atrial flutter and the clockwise (CW) atrial flutter has not been well clarified. This study was undertaken to evaluate the CV and the conducting area (CA) per millisecond around the tricuspid valve annulus ... Read more >>

Anadolu Kardiyol Derg (Anadolu kardiyoloji dergisi : AKD = the Anatolian journal of cardiology)
[2011, 11(8):711-716]

Cited: 0 times

View full text PDF listing >>



The effect of metabolic syndrome on heart rate turbulence in non-diabetic patients.

Alim Erdem, Masahiro Uenishi, Zekeriya Küçükdurmaz, Kazuo Matsumoto, Ritsushi Kato, Motoki Hara, Mehmet Yazici,

BACKGROUND:Metabolic syndrome (MetS), which includes a cluster of risk factors, is being increasingly recognized as a new risk factor for cardiovascular disease. Heart rate turbulence (HRT) is a Holter-based non-invasive method for detecting cardiac autonomic imbalance and is an independent, powerful predictor of cardiac arrhythmias and sudden cardiac death in ... Read more >>

Cardiol J (Cardiology journal)
[2012, 19(5):507-512]

Cited: 3 times

View full text PDF listing >>



Gaps in the ablation line as a potential cause of recovery from electrical isolation and their visualization using MRI.

Ravi Ranjan, Ritsushi Kato, Menekhem M Zviman, Timm M Dickfeld, Ariel Roguin, Ronald D Berger, Gordon F Tomaselli, Henry R Halperin,

Ablation has become an important tool in treating atrial fibrillation and ventricular tachycardia, yet the recurrence rates remain high. It is well established that ablation lines can be discontinuous and that conduction through the gaps in ablation lines can be affected by tissue heating. In this study, we looked at ... Read more >>

Circ Arrhythm Electrophysiol (Circulation. Arrhythmia and electrophysiology)
[2011, 4(3):279-286]

Cited: 50 times

View full text PDF listing >>



Advertisement

Disclaimer
1.0052 s