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Author Naokata Sumitomo

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Clinical characteristics of COVID-19 in children: A systematic review.

Jun Yasuhara, Toshiki Kuno, Hisato Takagi, Naokata Sumitomo,

BACKGROUND:Limited pediatric cases with coronavirus disease 2019 (COVID-19) have been reported and the clinical profiles regarding COVID-19 in children remain obscure. Our aim was to investigate the clinical characteristics of COVID-19 in children. METHODS:PUBMED and EMBASE were searched through 20 June 2020, for case reports and case series reporting pediatric ... Read more >>

Pediatr. Pulmonol. (Pediatric pulmonology)
[2020, :]

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Comparison of transcatheter patent ductus arteriosus closure between children and adults.

Jun Yasuhara, Toshiki Kuno, Takashi Kumamoto, Takuro Kojima, Hiroyuki Shimizu, Shigeki Yoshiba, Toshiki Kobayashi, Naokata Sumitomo,

The data comparing the characteristics and effect of transcatheter patent ductus arteriosus (PDA) closure between children and adults is scarce. We analyzed 54 consecutive patients who underwent transcatheter PDA closures. We divided the patients into 2 groups of < 18 years and ≥ 18 years and compared the hemodynamic changes before and after the PDA closure. ... Read more >>

Heart Vessels (Heart and vessels)
[2020, :]

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A significance of school screening electrocardiogram in the patients with ventricular noncompaction.

Keiichi Hirono, Nariaki Miyao, Masao Yoshinaga, Eiki Nishihara, Kazushi Yasuda, Shigeru Tateno, Mamoru Ayusawa, Naokata Sumitomo, Hitoshi Horigome, Mari Iwamoto, Hideto Takahashi, Seiichi Sato, Shigetoyo Kogaki, Seiko Ohno, Tadayoshi Hata, Daisuke Hazeki, Naomi Izumida, Masami Nagashima, Kunio Ohta, Nobuo Tauchi, Hiroya Ushinohama, Shozaburo Doi, Fukiko Ichida, ,

Left ventricular noncompaction (LVNC) is a hereditary cardiomyopathy and is associated with high morbidity and mortality. However, the role and significance of school screening for LVNC have not been fully elucidated. In this multicenter, retrospective cohort study, a total of 105 children with LVNC were included from 2000 to 2017. ... Read more >>

Heart Vessels (Heart and vessels)
[2020, 35(7):985-995]

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Desmin-related myopathy characterized by non-compaction cardiomyopathy, cardiac conduction defect, and coronary artery dissection.

Ran Tamiya, Yuki Saito, Daisuke Fukamachi, Koichi Nagashima, Yoshihiro Aizawa, Kimie Ohkubo, Takumi Hatta, Akira Sezai, Masashi Tanaka, Taisuke Ishikawa, Naomasa Makita, Naokata Sumitomo, Yasuo Okumura,

Desmin-related myopathy (DRM) is a rare heritable cardiac and skeletal muscle disease caused by mutations in the desmin gene (DES). DRM is generally characterized by skeletal muscle weakness, conduction disturbance, and dilated cardiomyopathy. However, the clinical cardiac phenotypes of DRM are not yet fully understood. Herein, we report the first ... Read more >>

ESC Heart Fail (ESC heart failure)
[2020, 7(3):1338-1343]

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Anomalous origin of the coronary artery coursing between the great vessels presenting with a cardiovascular event (J-CONOMALY Registry).

Koichi Nagashima, Takafumi Hiro, Daisuke Fukamachi, Yasuo Okumura, Ichiro Watanabe, Atsushi Hirayama, Masashi Tanaka, Tomofumi Tanaka, Itaru Takamisawa, Isao Taguchi, Akira Sato, Kazutaka Aonuma, Seiji Fukamizu, Akihiro Nakada, Atsuyuki Watanabe, Naofumi Amioka, Yasuyuki Suzuki, Naoya Matsumoto, Junichi Koizumi, Kazuya Kumagai, Masanao Naya, Yoshiharu Higuchi, Yoshiro Naito, Tohru Masuyama, Mitsuharu Kawamura, Ryusuke Tsunoda, Susumu Suzuki, Hideki Ishii, Toyoaki Murohara, Takeshi Shimizu, Yasuchika Takeishi, Kazuki Shiina, Jun Yamashita, Tomohiko Imamura, Naokata Sumitomo, Teruo Noguchi, Toshihide Aso, Kojiro Furukawa, Yasuteru Yamauchi, Kaoru Okishige, Kenji Sakata, Masakazu Yamagishi, Shigeo Shimizu, Masakazu Ohno, Teruyasu Sugano, Koichiro Matsumura, Kensuke Matsumoto, Kazuyuki Ozaki, Shunji Hayashidani, Hiroshi Meno, Atsushi Iwata, Takumi Higuma, Hirofumi Tomita, Hideaki Yoshino, Seiichi Taniai, Koki Shishido, Masato Murakami, Koji Negishi, Masaki Nii, Daisuke Wakatsuki, Hiroshi Suzuki, Yuji Motoike, Yukio Ozaki, Jun Nakazato, Hidemori Hayashi, Satoshi Higuchi, Morio Shoda,

AIMS:Anomalous origin of the coronary artery (AOCA) with an inter-arterial course (IAC) between the great vessels poses a risk for a life-threatening cardiovascular event. We assessed, in a registry-based study, the clinical features, treatment strategies, and prognoses of life-threatening cardiovascular events ensuant to AOCA. METHODS AND RESULTS:Included were 65 AOCA ... Read more >>

Eur Heart J Cardiovasc Imaging (European heart journal cardiovascular Imaging)
[2020, 21(2):222-230]

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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]

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Successful Ablation of Atrial Tachycardia Originating from Inside the Single Atrium and Conduit After a Fontan Operation.

Hitoshi Mori, Naokata Sumitomo, Shota Muraji, Tomohiko Imamura, Noriyuki Iwashita, Toshiki Kobayashi,

An 18-year-old male who had a past medical history of an intracardiac total cavopulmonary connection (TCPC) operation was referred to our hospital for radiofrequency catheter ablation (RFCA) of supraventricular tachycardia (SVT). Two types of SVTs were induced, and 3-dimensional (3D) maps were created using an ultra-high-density 3-dimensional mapping system (Rhythmia). ... Read more >>

Int Heart J (International heart journal)
[2020, 61(1):174-177]

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Predictors of Early Postoperative Supraventricular Tachyarrhythmias in Children After the Fontan Procedure.

Jun Yasuhara, Toshiki Kuno, Moe Taki, Koichi Toda, Takashi Kumamoto, Takuro Kojima, Hiroyuki Shimizu, Shigeki Yoshiba, Toshiki Kobayashi, Naokata Sumitomo,

Postoperative arrhythmias are a frequent and fatal complication after the Fontan operation. However, clinical evidence demonstrating early postoperative arrhythmias in children undergoing the Fontan operation is limited. This study aimed to evaluate the prevalence of arrhythmias and identify the predictors of early postoperative supraventricular tachyarrhythmias (SVTs) after the Fontan procedure.Data ... Read more >>

Int Heart J (International heart journal)
[2019, 60(6):1358-1365]

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Multivariate analysis of TU wave complex on electrocardiogram in Andersen-Tawil syndrome with KCNJ2 mutations.

Hitoshi Horigome, Yasuhiro Ishikawa, Norito Kokubun, Masao Yoshinaga, Naokata Sumitomo, Lisheng Lin, Yoshiaki Kato, Yuri Tanabe-Kameda, Seiko Ohno, Masami Nagashima, Minoru Horie,

BACKGROUND:The exact differences between the TU wave complex of ATS1 and that of healthy individuals remain to be investigated. We sought to characterize the TU wave complex of Andersen-Tawil syndrome type 1 (ATS1) using high frequency electrocardiogram (ECG) data. METHODS:Electrocardiograms were recorded as time series data with a 2 kHz frequency ... Read more >>

Ann Noninvasive Electrocardiol (Annals of noninvasive electrocardiology : the official journal of the International Society for Holter and Noninvasive Electrocardiology, Inc)
[2020, 25(3):e12721]

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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]

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Early assessment of cardiac troponin I predicts the postoperative cardiac status and clinical course after congenital heart disease surgery.

Takuro Kojima, Koichi Toda, Takayuki Oyanagi, Shigeki Yoshiba, Toshiki Kobayashi, Naokata Sumitomo,

Cardiac troponin I (cTnI) is a regulatory protein with a high sensitivity and specificity for cardiac injury. Preoperative and postoperative elevations of cTnI are usually considered predictors of the mortality and morbidity. However, little is known about the relationship between the cTnI and postoperative course after the congenital heart disease ... Read more >>

Heart Vessels (Heart and vessels)
[2020, 35(3):417-421]

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Improvement in Dyssynchrony with Pharmacological Ablation of Right-Sided Accessory Pathway-Induced Cardiomyopathy in Infants.

Mai Sekine, Satoshi Masutani, Tomohiko Imamura, Yoichi Iwamoto, Shota Muraji, Shigeki Yoshiba, Hirotaka Ishido, Naokata Sumitomo,

Right-sided accessary pathways in patients with Wolff-Parkinson-White (WPW) syndrome may cause cardiac dyssynchrony and dilated cardiomyopathy, with a characteristic septal shape, irrespective of any supraventricular tachycardia episodes. We report on two infants (13 and 5 months), whose right-sided accessary pathway-induced dilated cardiomyopathy was successfully treated by flecainide for the first ... Read more >>

Int Heart J (International heart journal)
[2019, 60(5):1201-1205]

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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]

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Usefulness of Red Blood Cell Distribution Width in the Assessment of Hemodynamics After Tetralogy of Fallot Repair.

Takuro Kojima, Tomohiko Imamura, Yousuke Osada, Shouta Muraji, Marie Nakano, Takayuki Oyanagi, Shigeki Yoshiba, Toshiki Kobayashi, Naokata Sumitomo,

BACKGROUND:There are no reports on the effect of red blood cell distribution width (RDW) in surgical repair of tetralogy of Fallot (ToF). Methods and Results: A total of 50 patients who underwent cardiac catheterization after surgical repair of ToF were retrospectively assessed. RDW was positively correlated with the ratio of right ventricular ... Read more >>

Circ. J. (Circulation journal : official journal of the Japanese Circulation Society)
[2019, 83(4):818-823]

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The necessity of implantable cardioverter defibrillators in patients with Kearns-Sayre syndrome - systematic review of the articles.

Tomohiko Imamura, Naokata Sumitomo, Shota Muraji, Hitoshi Mori, Yousuke Osada, Takayuki Oyanagi, Takuro Kojima, Shigeki Yoshiba, Toshiki Kobayashi, Katsushige Ono,

The most common cardiac feature of Kearns-Sayre syndrome (KSS) is atrioventricular block (AVB), and pacemaker implantations (PMIs) are recommended for KSS patients with advanced AVB. However, some KSS patients develop fatal arrhythmias such as polymorphic ventricular tachycardia (PMVT) and ventricular fibrillation (VF) and die suddenly even after PMIs. We report ... Read more >>

Int. J. Cardiol. (International journal of cardiology)
[2019, 279:105-111]

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Different responses to exercise between Andersen-Tawil syndrome and catecholaminergic polymorphic ventricular tachycardia.

Yuko Y Inoue, Takeshi Aiba, Hiro Kawata, Tomoko Sakaguchi, Wataru Mitsuma, Hiroshi Morita, Takashi Noda, Hiroshi Takaki, Keiko Toyohara, Yoshiaki Kanaya, Toshiyuki Itoi, Takeshi Mitsuhashi, Naokata Sumitomo, Yongkeun Cho, Satoshi Yasuda, Shiro Kamakura, Kengo Kusano, Yoshihiro Miyamoto, Minoru Horie, Wataru Shimizu,

Aims:Andersen-Tawil Syndrome (ATS) and catecholaminergic polymorphic ventricular tachycardia (CPVT) are both inherited arrhythmic disorders characterized by bidirectional ventricular tachycardia (VT). The aim of this study was to evaluate the diagnostic value of exercise stress tests for differentiating between ATS and CPVT. Methods and results:We included 26 ATS patients with KCNJ2 ... 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(10):1675-1682]

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Successful radiofrequency catheter ablation of life-threatening atrial tachycardia in an infant with asplenia syndrome.

Jun Yasuhara, Takashi Kumamoto, Takuro Kojima, Hiroyuki Shimizu, Shigeki Yoshiba, Toshiki Kobayashi, Takayuki Oyanagi, Hiroyuki Yamagishi, Naokata Sumitomo,

A 1-year-old infant with asplenia syndrome and congenital heart disease consisting of common atrium, common inlet left ventricle with a common atrio-ventricular (AV) valve, pulmonary atresia, and total anomalous pulmonary venous connection was admitted to our hospital for radiofrequency catheter ablation (RFCA) of supraventricular tachycardia (SVT) before total cavo-pulmonary connection. ... Read more >>

J Cardiol Cases (Journal of cardiology cases)
[2019, 19(1):1-4]

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Congenital multiple pulmonary vein atresia and stenosis in an infant.

Yuriko Abe, Naokata Sumitomo, Mamoru Ayusawa, Tsutomu Yamada, Masahiko Sugitani,

Pediatr Int (Pediatrics international : official journal of the Japan Pediatric Society)
[2018, 60(10):976-978]

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Linking the heart and the brain: Neurodevelopmental disorders in patients with catecholaminergic polymorphic ventricular tachycardia.

Krystien V V Lieve, Judith M A Verhagen, Jinhong Wei, J Martijn Bos, Christian van der Werf, Ferran Rosés I Noguer, Grazia M S Mancini, Wenting Guo, Ruiwu Wang, Freek van den Heuvel, Ingrid M E Frohn-Mulder, Wataru Shimizu, Akihiko Nogami, Hitoshi Horigome, Jason D Roberts, Antoine Leenhardt, Harry J G Crijns, Andreas C Blank, Takeshi Aiba, Ans C P Wiesfeld, Nico A Blom, Naokata Sumitomo, Jan Till, Michael J Ackerman, S R Wayne Chen, Ingrid M B H van de Laar, Arthur A M Wilde,

BACKGROUND:Catecholaminergic polymorphic ventricular tachycardia (CPVT) is an uncommon inherited arrhythmia disorder characterized by adrenergically evoked ventricular arrhythmias. Mutations in the cardiac calcium release channel/ryanodine receptor gene (RYR2) are identified in the majority of patients with CPVT. RyR2 is also the major RyR isoform expressed in the brain. OBJECTIVE:The purpose of ... Read more >>

Heart Rhythm (Heart rhythm)
[2019, 16(2):220-228]

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Guidelines for Heart Disease Screening in Schools (JCS 2016/JSPCCS 2016) - Digest Version.

Naokata Sumitomo, Reizo Baba, Shozaburo Doi, Takashi Higaki, Hitoshi Horigome, Fukiko Ichida, Hiromi Ishikawa, Mari Iwamoto, Naomi Izumida, Yuji Kasamaki, Keisuke Kuga, Yoshihide Mitani, Haruki Musha, Toshio Nakanishi, Masao Yoshinaga, Katsumi Abe, Mamoru Ayusawa, Tatsunori Hokosaki, Taichi Kato, Yoshiaki Kato, Kunio Ohta, Hirofumi Sawada, Hiroya Ushinohama, Shigeki Yoshiba, Hirotsugu Atarashi, Atsushi Hirayama, Minoru Horie, Masami Nagashima, Koichiro Niwa, Shunichi Ogawa, Ken Okumura, Hiroyuki Tsutsui, ,

Circ. J. (Circulation journal : official journal of the Japanese Circulation Society)
[2018, 82(9):2385-2444]

Cited: 1 time

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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]

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Efficacy of catheter interventions in the early and very early postoperative period after CHD operation.

Takuro Kojima, Tomohiko Imamura, Yousuke Osada, Shouta Muraji, Marie Nakano, Takayuki Oyanagi, Shigeki Yoshiba, Toshiki Kobayashi, Naokata Sumitomo,

BACKGROUND:Catheter interventions for residual lesions in the early postoperative period after CHD operations are still not established as a reliable treatment option. METHODS:We retrospectively reviewed our institutional experience of cardiac catheterisations and catheter interventions performed in the early postoperative period. We classified our patients into two groups. The "hyper" acute ... Read more >>

Cardiol Young (Cardiology in the young)
[2018, 28(12):1426-1430]

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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]

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Standard Values and Characteristics of Electrocardiographic Findings in Children and Adolescents.

Masao Yoshinaga, Mari Iwamoto, Hitoshi Horigome, Naokata Sumitomo, Hiroya Ushinohama, Naomi Izumida, Nobuo Tauchi, Tatsuya Yoneyama, Katsumi Abe, Masami Nagashima,

BACKGROUND:Reference values and the characteristics of the electrocardiographic (ECG) findings using a large number of subjects are lacking for children and adolescents.Methods and Results:A total of 56,753 digitally stored ECGs of participants in a school-based ECG screening system were obtained between 2006 and 2009 in Kagoshima, Japan. Each ECG was manually reviewed ... Read more >>

Circ. J. (Circulation journal : official journal of the Japanese Circulation Society)
[2018, 82(3):831-839]

Cited: 2 times

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Retrosternal Implantation of the Cardioverter-Defibrillator Lead in an Infant.

Hiroaki Hata, Naokata Sumitomo, Toshiko Nakai, Atsushi Amano,

Using an implantable cardioverter-defibrillator (ICD) in small children is still challenging, but the need is increasing. We present a new approach to overcoming ICD problems caused by growth in infants. A redundant ICD lead was fixed to the superior border of the sternum and tunneled retrosternally to the subxiphoid region ... Read more >>

Ann. Thorac. Surg. (The Annals of thoracic surgery)
[2017, 103(5):e449-e451]

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