Full Text Journal Articles by
Author Toshiki Kobayashi

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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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Effect of types of ankle-foot orthoses on energy expenditure metrics during walking in individuals with stroke: a systematic review.

Aliyeh Daryabor, Sumiko Yamamoto, Michael Orendurff, Toshiki Kobayashi,

Purpose: This systematic review is aimed at evaluating the efficacy of AFO types and comparison between them on the energy expenditure metrics of walking in individuals who had suffered a stroke with (sub)acute or chronic evolution.Methods: The following databases were searched; PubMed, Scopus, ISI Web of Knowledge, Embase and Cochrane ... Read more >>

Disabil Rehabil (Disability and rehabilitation)
[2020, :1-11]

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Factors associated with a risk of prosthetic knee buckling during walking in unilateral transfemoral amputees.

Genki Hisano, Satoru Hashizume, Yoshiyuki Kobayashi, Akihiko Murai, Toshiki Kobayashi, Motomu Nakashima, Hiroaki Hobara,

BACKGROUND:Walking and mobility are essential for a satisfactory quality of life. However, individuals with transfemoral amputations have difficulties in preventing falls due to prosthetic knee buckling, defined as the sudden loss of postural support during weight-bearing activities. The risk of prosthetic knee buckling can be evaluated by determining the prosthetic ... Read more >>

Gait Posture (Gait & posture)
[2020, 77:69-74]

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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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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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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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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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The effects of alignment of an articulated ankle-foot orthosis on lower limb joint kinematics and kinetics during gait in individuals post-stroke.

Toshiki Kobayashi, Michael S Orendurff, Grace Hunt, Fan Gao, Nicholas LeCursi, Lucas S Lincoln, K Bo Foreman,

Mechanical tuning of an ankle-foot orthosis (AFO) is important in improving gait in individuals post-stroke. Alignment and resistance are two factors that are tunable in articulated AFOs. The aim of this study was to investigate the effects of changing AFO ankle alignment on lower limb joint kinematics and kinetics with ... Read more >>

J Biomech (Journal of biomechanics)
[2019, 83:57-64]

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Corrigendum to "A little bit faster: Lower extremity joint kinematics and kinetics as recreational runners achieve faster speeds" [J. Biomech. 71 (2018) 167-175].

Michael S Orendurff, Toshiki Kobayashi, Kirsten Tulchin-Francis, Ann Marie Herring Tullock, Chris Villarosa, Charles Chan, Emily Kraus, Siobhan Strike,

J Biomech (Journal of biomechanics)
[2019, 82:404]

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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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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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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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The effects of an articulated ankle-foot orthosis with resistance-adjustable joints on lower limb joint kinematics and kinetics during gait in individuals post-stroke.

Toshiki Kobayashi, Michael S Orendurff, Grace Hunt, Fan Gao, Nicholas LeCursi, Lucas S Lincoln, K Bo Foreman,

BACKGROUND:Resistance is a key mechanical property of an ankle-foot orthosis that affects gait in individuals post-stroke. Triple Action® joints allow independent adjustment of plantarflexion resistance and dorsiflexion resistance of an ankle-foot orthosis. Therefore, the aim of this study was to investigate the effects of incremental changes in dorsiflexion and plantarflexion ... Read more >>

Clin Biomech (Bristol, Avon) (Clinical biomechanics (Bristol, Avon))
[2018, 59:47-55]

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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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The effect of transverse prosthetic alignment changes on socket reaction moments during gait in individuals with transtibial amputation.

Hiroshi Hashimoto, Toshiki Kobayashi, Fan Gao, Masataka Kataoka, Michael S Orendurff, Kuniharu Okuda,

BACKGROUND:Alignment affects gait of individuals with transtibial prostheses. Sagittal and coronal alignment changes of the transtibial prostheses were demonstrated to affect socket reaction moments. However, the effects of transverse alignment changes on the socket reaction moments are not known. RESEARCH QUESTION:The aim of this study was to investigate the effects ... Read more >>

Gait Posture (Gait & posture)
[2018, 65:8-14]

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Effect of plantarflexion resistance of an ankle-foot orthosis on ankle and knee joint power during gait in individuals post-stroke.

Toshiki Kobayashi, Michael S Orendurff, Madeline L Singer, Fan Gao, Grace Hunt, K Bo Foreman,

Plantarflexion resistance of an ankle-foot orthosis (AFO) plays an important role to prevent foot-drop, but its impact on push-off has not been well investigated in individuals post-stroke. The aim of this study was to investigate the effect of plantarflexion resistance of an articulated AFO on ankle and knee joint power ... Read more >>

J Biomech (Journal of biomechanics)
[2018, 75:176-180]

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Polarization insensitive frequency conversion for an atom-photon entanglement distribution via a telecom network.

Rikizo Ikuta, Toshiki Kobayashi, Tetsuo Kawakami, Shigehito Miki, Masahiro Yabuno, Taro Yamashita, Hirotaka Terai, Masato Koashi, Tetsuya Mukai, Takashi Yamamoto, Nobuyuki Imoto,

Long-lifetime quantum storages accessible to the telecom photonic infrastructure are essential to long-distance quantum communication. Atomic quantum storages have achieved subsecond storage time corresponding to 1000 km transmission time for a telecom photon through a quantum repeater algorithm. However, the telecom photon cannot be directly interfaced to typical atomic storages. Solid-state ... Read more >>

Nat Commun (Nature communications)
[2018, 9(1):1997]

Cited: 3 times

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A little bit faster: Lower extremity joint kinematics and kinetics as recreational runners achieve faster speeds.

Michael S Orendurff, Toshiki Kobayashi, Kirsten Tulchin-Francis, Ann Marie Herring Tullock, Chris Villarosa, Charles Chan, Emily Kraus, Siobhan Strike,

There appears a linear relationship between small increases in running speed and cardiovascular health benefits. Encouraging or coaching recreational runners to increase their running speed to derive these health benefits might be more effective if their joint level kinematic and kinetic strategy was understood. The aim of this investigation was ... Read more >>

J Biomech (Journal of biomechanics)
[2018, 71:167-175]

Cited: 1 time

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The effect of coronal prosthetic alignment changes on socket reaction moments, spatiotemporal parameters, and perception of alignment during gait in individuals with transtibial amputation.

Hiroshi Hashimoto, Toshiki Kobayashi, Fan Gao, Masataka Kataoka, Kuniharu Okuda,

Introduction:The alignment of a prosthesis is clinically determined based on observations by clinicians and the subjective perception of amputees during gait. However, this process has been reported to be unreliable. Socket reaction moment has been reported to be significantly impacted by alignment changes, but the impact of these alignment changes ... Read more >>

J Rehabil Assist Technol Eng (Journal of rehabilitation and assistive technologies engineering)
[2018, 5:2055668318795402]

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The Acute Effects of Static and Cyclic Stretching on Muscle Stiffness and Hardness of Medial Gastrocnemius Muscle.

Noriaki Maeda, Yukio Urabe, Shogo Tsutsumi, Shogo Sakai, Hironori Fujishita, Toshiki Kobayashi, Makoto Asaeda, Kazuhiko Hirata, Yukio Mikami, Hiroaki Kimura,

This study aimed to clarify the acute effects of static stretching (SS) and cyclic stretching (CS) on muscle stiffness and hardness of the medial gastrocnemius muscle (MG) by using ultrasonography, range of motion (ROM) of the ankle joint and ankle plantar flexor. Twenty healthy men participated in this study. Participants ... Read more >>

J Sports Sci Med (Journal of sports science & medicine)
[2017, 16(4):514-520]

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Effect of Shoes on Stiffness and Energy Efficiency of Ankle-Foot Orthosis: Bench Testing Analysis.

Toshiki Kobayashi, Fan Gao, Nicholas LeCursi, K Bo Foreman, Michael S Orendurff,

Understanding the mechanical properties of ankle-foot orthoses (AFOs) is important to maximize their benefit for those with movement disorders during gait. Though mechanical properties such as stiffness and/or energy efficiency of AFOs have been extensively studied, it remains unknown how and to what extent shoes influence their properties. The aim ... Read more >>

J Appl Biomech (Journal of applied biomechanics)
[2017, 33(6):460-463]

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Mach-Zehnder interferometer using frequency-domain beamsplitter.

Toshiki Kobayashi, Daisuke Yamazaki, Kenichiro Matsuki, Rikizo Ikuta, Shigehito Miki, Taro Yamashita, Hirotaka Terai, Takashi Yamamoto, Masato Koashi, Nobuyuki Imoto,

We demonstrate a first-order interference between coherent light at 1580 nm and 795 nm by using a frequency-domain Mach-Zehnder interferometer (MZI). The MZI is implemented by two frequency-domain BSs based on a second-order nonlinear optical effect in a periodically-poled lithium niobate waveguide with a strong pump light. The observed visibility ... Read more >>

Opt Express (Optics express)
[2017, 25(10):12052-12060]

Cited: 1 time

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An articulated ankle-foot orthosis with adjustable plantarflexion resistance, dorsiflexion resistance and alignment: A pilot study on mechanical properties and effects on stroke hemiparetic gait.

Toshiki Kobayashi, Michael S Orendurff, Grace Hunt, Lucas S Lincoln, Fan Gao, Nicholas LeCursi, K Bo Foreman,

Mechanical properties of an articulated ankle-foot orthosis (AFO) are closely related to gait performance in individuals post-stroke. This paper presents a pilot study on the mechanical properties of a novel articulated AFO with adjustable plantarflexion resistance, dorsiflexion resistance and alignment, and its effect on ankle and knee joint kinematics and ... Read more >>

Med Eng Phys (Medical engineering & physics)
[2017, 44:94-101]

Cited: 4 times

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