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Koike S, Sakakibara E, Satomura Y, Sakurada H, Yamagishi M, Matsuoka J, Okada N, Kasai K. Shared functional impairment in the prefrontal cortex affects symptom severity across psychiatric disorders. Psychol Med 2022; 52:2661-2670. [PMID: 33336641 PMCID: PMC9647535 DOI: 10.1017/s0033291720004742] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Revised: 10/27/2020] [Accepted: 11/06/2020] [Indexed: 12/24/2022]
Abstract
BACKGROUND The prefrontal deficits in psychiatric disorders have been investigated using functional neuroimaging tools; however, no studies have tested the related characteristics across psychiatric disorders considering various demographic and clinical confounders. METHODS We analyzed 1558 functional brain measurements using a functional near-infrared spectroscopy during a verbal fluency task from 1200 participants with three disease spectra [196 schizophrenia, 189 bipolar disorder (BPD), and 394 major depressive disorder (MDD)] and 369 healthy controls along with demographic characteristics (age, gender, premorbid IQ, and handedness), task performance during the measurements, clinical assessments, and medication equivalent doses (chlorpromazine, diazepam, biperiden, and imipramine) in a consistent manner. The association between brain functions and demographic and clinical variables was tested using a general linear mixed model (GLMM). Then, the direction of relationship between brain activity and symptom severity, controlling for any other associations, was estimated using a model comparison of structural equation models (SEMs). RESULTS The GLMM showed a shared functional deficit of brain activity and a schizophrenia-specific delayed activity timing in the prefrontal cortex (false discovery rate-corrected p < 0.05). Comparison of SEMs showed that brain activity was associated with the global assessment of functioning scores in the left inferior frontal gyrus opercularis (IFGOp) in BPD group and the bilateral superior temporal gyrus and middle temporal gyrus, and the left superior frontal gyrus, inferior frontal gyrus triangularis, and IFGOp in MDD group. CONCLUSION This cross-disease large-sample neuroimaging study with high-quality clinical data reveals a robust relationship between prefrontal function and behavioral outcomes across three major psychiatric disorders.
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Affiliation(s)
- Shinsuke Koike
- University of Tokyo Institute for Diversity & Adaptation of Human Mind (UTIDAHM), Meguro-ku, Tokyo 153-8902, Japan
- Center for Evolutionary Cognitive Sciences, Graduate School of Art and Sciences, The University of Tokyo, Meguro-ku, Tokyo 153-8902, Japan
- University of Tokyo Center for Integrative Science of Human Behavior (CiSHuB), 3-8-1 Komaba, Meguro-ku, Tokyo 153-8902, Japan
- The International Research Center for Neurointelligence (WPI-IRCN), Institutes for Advanced Study (UTIAS), University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8654, Japan
- Department of Neuropsychiatry, Graduate School of Medicine, University of Tokyo, Bunkyo-ku, Tokyo 113-8655, Japan
| | - Eisuke Sakakibara
- Department of Neuropsychiatry, Graduate School of Medicine, University of Tokyo, Bunkyo-ku, Tokyo 113-8655, Japan
| | - Yoshihiro Satomura
- Department of Neuropsychiatry, Graduate School of Medicine, University of Tokyo, Bunkyo-ku, Tokyo 113-8655, Japan
| | - Hanako Sakurada
- Department of Neuropsychiatry, Graduate School of Medicine, University of Tokyo, Bunkyo-ku, Tokyo 113-8655, Japan
| | - Mika Yamagishi
- Department of Neuropsychiatry, Graduate School of Medicine, University of Tokyo, Bunkyo-ku, Tokyo 113-8655, Japan
| | - Jun Matsuoka
- Department of Neuropsychiatry, Graduate School of Medicine, University of Tokyo, Bunkyo-ku, Tokyo 113-8655, Japan
| | - Naohiro Okada
- The International Research Center for Neurointelligence (WPI-IRCN), Institutes for Advanced Study (UTIAS), University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8654, Japan
- Department of Neuropsychiatry, Graduate School of Medicine, University of Tokyo, Bunkyo-ku, Tokyo 113-8655, Japan
| | - Kiyoto Kasai
- University of Tokyo Institute for Diversity & Adaptation of Human Mind (UTIDAHM), Meguro-ku, Tokyo 153-8902, Japan
- University of Tokyo Center for Integrative Science of Human Behavior (CiSHuB), 3-8-1 Komaba, Meguro-ku, Tokyo 153-8902, Japan
- The International Research Center for Neurointelligence (WPI-IRCN), Institutes for Advanced Study (UTIAS), University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8654, Japan
- Department of Neuropsychiatry, Graduate School of Medicine, University of Tokyo, Bunkyo-ku, Tokyo 113-8655, Japan
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2
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Sakakibara E, Satomura Y, Matsuoka J, Koike S, Okada N, Sakurada H, Yamagishi M, Kawakami N, Kasai K. Abnormality of Resting-State Functional Connectivity in Major Depressive Disorder: A Study With Whole-Head Near-Infrared Spectroscopy. Front Psychiatry 2021; 12:664859. [PMID: 33995150 PMCID: PMC8116563 DOI: 10.3389/fpsyt.2021.664859] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/06/2021] [Accepted: 03/25/2021] [Indexed: 11/13/2022] Open
Abstract
Near-infrared spectroscopy (NIRS) is a functional neuroimaging modality that has advantages in clinical usage. Previous functional magnetic resonance imaging (fMRI) studies have found that the resting-state functional connectivity (RSFC) of the default mode network (DMN) is increased, while the RSFC of the cognitive control network (CCN) is reduced in patients with major depressive disorder (MDD) compared with healthy controls. This study tested whether the NIRS-based RSFC measurements can detect the abnormalities in RSFC that have been associated with MDD in previous fMRI studies. We measured 8 min of resting-state brain activity in 34 individuals with MDD and 78 age- and gender-matched healthy controls using a whole-head NIRS system. We applied a previously established partial correlation analysis for estimating RSFCs between the 17 cortical regions. We found that MDD patients had a lower RSFC between the left dorsolateral prefrontal cortex and the parietal lobe that comprise the CCN, and a higher RSFC between the right orbitofrontal cortex and ventrolateral prefrontal cortex, compared to those in healthy controls. The RSFC strength of the left CCN was negatively correlated with the severity of depressive symptoms and the dose of antipsychotic medication and positively correlated with the level of social functioning. The results of this study suggest that NIRS-based measurements of RSFCs have potential clinical applications.
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Affiliation(s)
- Eisuke Sakakibara
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Yoshihiro Satomura
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Jun Matsuoka
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Shinsuke Koike
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan.,International Research Center for Neurointelligence (IRCN), The University of Tokyo Institutes for Advanced Study (UTIAS), The University of Tokyo, Tokyo, Japan.,University of Tokyo Institute for Diversity & Adaptation of Human Mind (UTIDAHM), Tokyo, Japan.,UTokyo Center for Integrative Science of Human Behavior (CiSHuB), Graduate School of Art and Sciences, The University of Tokyo, Tokyo, Japan.,Center for Evolutionary Cognitive Sciences, Graduate School of Arts and Sciences, The University of Tokyo, Tokyo, Japan
| | - Naohiro Okada
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan.,International Research Center for Neurointelligence (IRCN), The University of Tokyo Institutes for Advanced Study (UTIAS), The University of Tokyo, Tokyo, Japan
| | - Hanako Sakurada
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Mika Yamagishi
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Norito Kawakami
- Department of Mental Health, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Kiyoto Kasai
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan.,International Research Center for Neurointelligence (IRCN), The University of Tokyo Institutes for Advanced Study (UTIAS), The University of Tokyo, Tokyo, Japan.,University of Tokyo Institute for Diversity & Adaptation of Human Mind (UTIDAHM), Tokyo, Japan.,UTokyo Center for Integrative Science of Human Behavior (CiSHuB), Graduate School of Art and Sciences, The University of Tokyo, Tokyo, Japan
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3
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Koshiyama D, Kirihara K, Usui K, Tada M, Fujioka M, Morita S, Kawakami S, Yamagishi M, Sakurada H, Sakakibara E, Satomura Y, Okada N, Kondo S, Araki T, Jinde S, Kasai K. Resting-state EEG beta band power predicts quality of life outcomes in patients with depressive disorders: A longitudinal investigation. J Affect Disord 2020; 265:416-422. [PMID: 32090768 DOI: 10.1016/j.jad.2020.01.030] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/19/2019] [Revised: 11/23/2019] [Accepted: 01/05/2020] [Indexed: 11/15/2022]
Abstract
BACKGROUND Quality of life is severely impaired in patients with depressive disorders. Previous studies have focused on biomarkers predicting depressive symptomatology; however, studies investigating biomarkers predicting quality of life outcomes are limited. Improving quality of life is important because it is related not only to mental health but also to physical health. We need to develop a biomarker related to quality of life as a therapeutic target for patients with depressive disorders. Resting-state electroencephalography (EEG) is easy to record in clinical settings. The index of bandwidth spectral power predicts treatment response in depressive disorders and thus may be a candidate biomarker. However, no longitudinal studies have investigated whether EEG-recorded power could predict quality of life outcomes in patients with depressive disorders. METHODS The resting-state EEG-recorded bandwidth spectral power at baseline and the World Health Organization Quality of Life (QOL)-26 scores at 3-year follow-up were measured in 44 patients with depressive disorders. RESULTS The high beta band power (20-30 Hz) at baseline significantly predicted QOL at the 3-year follow-up after considering depressive symptoms and medication effects in a longitudinal investigation in patients with depressive disorders (β = 0.38, p = 0.01). LIMITATIONS We did not have healthy subjects as a comparison group in this study. CONCLUSIONS Our findings suggest that resting-state beta activity has the potential to be a useful biomarker for predicting future quality of life outcomes in patients with depressive disorders.
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Affiliation(s)
- Daisuke Koshiyama
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Kenji Kirihara
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Kaori Usui
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Mariko Tada
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan; The International Research Center for Neurointelligence (WPI-IRCN) at The University of Tokyo Institutes for Advanced Study (UTIAS), The University of Tokyo, Tokyo, Japan
| | - Mao Fujioka
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Susumu Morita
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Shintaro Kawakami
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Mika Yamagishi
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Hanako Sakurada
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Eisuke Sakakibara
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Yoshihiro Satomura
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Naohiro Okada
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan; The International Research Center for Neurointelligence (WPI-IRCN) at The University of Tokyo Institutes for Advanced Study (UTIAS), The University of Tokyo, Tokyo, Japan
| | - Shinsuke Kondo
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Tsuyoshi Araki
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Seichiro Jinde
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Kiyoto Kasai
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan; The International Research Center for Neurointelligence (WPI-IRCN) at The University of Tokyo Institutes for Advanced Study (UTIAS), The University of Tokyo, Tokyo, Japan.
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4
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Zhao Z, Jinde S, Koike S, Tada M, Satomura Y, Yoshikawa A, Nishimura Y, Takizawa R, Kinoshita A, Sakakibara E, Sakurada H, Yamagishi M, Nishimura F, Inai A, Nishioka M, Eriguchi Y, Araki T, Takaya A, Kan C, Umeda M, Shimazu A, Hashimoto H, Bundo M, Iwamoto K, Kakiuchi C, Kasai K. Altered expression of microRNA-223 in the plasma of patients with first-episode schizophrenia and its possible relation to neuronal migration-related genes. Transl Psychiatry 2019; 9:289. [PMID: 31712567 PMCID: PMC6848172 DOI: 10.1038/s41398-019-0609-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Revised: 09/10/2019] [Accepted: 09/30/2019] [Indexed: 12/26/2022] Open
Abstract
Recent studies have shown that microRNAs (miRNAs) play a role as regulators of neurodevelopment by modulating gene expression. Altered miRNA expression has been reported in various psychiatric disorders, including schizophrenia. However, the changes in the miRNA expression profile that occur during the initial stage of schizophrenia have not been fully investigated. To explore the global alterations in miRNA expression profiles that may be associated with the onset of schizophrenia, we first profiled miRNA expression in plasma from 17 patients with first-episode schizophrenia and 17 healthy controls using microarray analysis. Among the miRNAs that showed robust changes, the elevated expression of has-miR-223-3p (miR-223) was validated via quantitative reverse transcription-polymerase chain reaction (qRT-PCR) using another independent sample set of 21 schizophrenia patients and 21 controls. To identify the putative targets of miR-223, we conducted a genome-wide gene expression analysis in neuronally differentiated SK-N-SH cells with stable miR-223 overexpression and an in silico analysis. We found that the mRNA expression levels of four genes related to the cytoskeleton or cell migration were significantly downregulated in miR-223-overexpressing cells, possibly due to interactions with miR-223. The in silico analysis suggested the presence of miR-223 target sites in these four genes. Lastly, a luciferase assay confirmed that miR-223 directly interacted with the 3' untranslated regions (UTRs) of all four genes. Our results reveal an increase in miR-223 in plasma during both the first episode and the later stage of schizophrenia, which may affect the expression of cell migration-related genes targeted by miR-223.
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Affiliation(s)
- Zhilei Zhao
- 0000 0001 2151 536Xgrid.26999.3dDepartment of Neuropsychiatry, Graduate School of Medicine, the University of Tokyo, Bunkyo-ku, Tokyo, 113-8655 Japan ,0000 0001 2151 536Xgrid.26999.3dInternational Research Center for Neurointelligence, The University of Tokyo, Bunkyo-ku, Tokyo, 113-0033 Japan
| | - Seiichiro Jinde
- Department of Neuropsychiatry, Graduate School of Medicine, the University of Tokyo, Bunkyo-ku, Tokyo, 113-8655, Japan.
| | - Shinsuke Koike
- 0000 0001 2151 536Xgrid.26999.3dDepartment of Neuropsychiatry, Graduate School of Medicine, the University of Tokyo, Bunkyo-ku, Tokyo, 113-8655 Japan
| | - Mariko Tada
- 0000 0001 2151 536Xgrid.26999.3dDepartment of Neuropsychiatry, Graduate School of Medicine, the University of Tokyo, Bunkyo-ku, Tokyo, 113-8655 Japan
| | - Yoshihiro Satomura
- 0000 0001 2151 536Xgrid.26999.3dDepartment of Neuropsychiatry, Graduate School of Medicine, the University of Tokyo, Bunkyo-ku, Tokyo, 113-8655 Japan
| | - Akane Yoshikawa
- 0000 0001 2151 536Xgrid.26999.3dDepartment of Neuropsychiatry, Graduate School of Medicine, the University of Tokyo, Bunkyo-ku, Tokyo, 113-8655 Japan
| | - Yukika Nishimura
- 0000 0001 2151 536Xgrid.26999.3dDepartment of Neuropsychiatry, Graduate School of Medicine, the University of Tokyo, Bunkyo-ku, Tokyo, 113-8655 Japan
| | - Ryu Takizawa
- 0000 0001 2151 536Xgrid.26999.3dDepartment of Neuropsychiatry, Graduate School of Medicine, the University of Tokyo, Bunkyo-ku, Tokyo, 113-8655 Japan
| | - Akihide Kinoshita
- 0000 0001 2151 536Xgrid.26999.3dDepartment of Neuropsychiatry, Graduate School of Medicine, the University of Tokyo, Bunkyo-ku, Tokyo, 113-8655 Japan
| | - Eisuke Sakakibara
- 0000 0001 2151 536Xgrid.26999.3dDepartment of Neuropsychiatry, Graduate School of Medicine, the University of Tokyo, Bunkyo-ku, Tokyo, 113-8655 Japan
| | - Hanako Sakurada
- 0000 0001 2151 536Xgrid.26999.3dDepartment of Neuropsychiatry, Graduate School of Medicine, the University of Tokyo, Bunkyo-ku, Tokyo, 113-8655 Japan
| | - Mika Yamagishi
- 0000 0001 2151 536Xgrid.26999.3dDepartment of Neuropsychiatry, Graduate School of Medicine, the University of Tokyo, Bunkyo-ku, Tokyo, 113-8655 Japan
| | - Fumichika Nishimura
- 0000 0001 2151 536Xgrid.26999.3dDepartment of Neuropsychiatry, Graduate School of Medicine, the University of Tokyo, Bunkyo-ku, Tokyo, 113-8655 Japan
| | - Aya Inai
- 0000 0001 2151 536Xgrid.26999.3dDepartment of Child Neuropsychiatry, Graduate School of Medicine, the University of Tokyo, Bunkyo-ku, Tokyo, 113-8655 Japan
| | - Masaki Nishioka
- 0000 0001 2151 536Xgrid.26999.3dDepartment of Neuropsychiatry, Graduate School of Medicine, the University of Tokyo, Bunkyo-ku, Tokyo, 113-8655 Japan
| | - Yosuke Eriguchi
- 0000 0001 2151 536Xgrid.26999.3dDepartment of Child Neuropsychiatry, Graduate School of Medicine, the University of Tokyo, Bunkyo-ku, Tokyo, 113-8655 Japan
| | - Tsuyoshi Araki
- 0000 0001 2151 536Xgrid.26999.3dDepartment of Neuropsychiatry, Graduate School of Medicine, the University of Tokyo, Bunkyo-ku, Tokyo, 113-8655 Japan
| | - Atsuhiko Takaya
- Department of Psychiatry, Fukui Kinen Hospital, Miura City, Kanagawa 238-0115 Japan
| | - Chiemi Kan
- 0000 0001 2151 536Xgrid.26999.3dDepartment of Mental Health, Graduate School of Medicine, the University of Tokyo, Bunkyo-ku, Tokyo, 113-0033 Japan
| | - Maki Umeda
- 0000 0001 2151 536Xgrid.26999.3dDepartment of Mental Health, Graduate School of Medicine, the University of Tokyo, Bunkyo-ku, Tokyo, 113-0033 Japan ,0000 0001 0318 6320grid.419588.9Department of Public Health Nursing, Graduate School of Nursing Science, St. Luke’s International University, Chuo-ku, Tokyo, 104-0044 Japan
| | - Akihito Shimazu
- 0000 0000 9206 2938grid.410786.cCenter for Human and Social Sciences, College of Liberal Arts and Sciences, Kitasato University, Sagamihara City, Kanagawa 252-0373 Japan
| | - Hideki Hashimoto
- 0000 0001 2151 536Xgrid.26999.3dDepartment of Health Economics and Epidemiology Research, School of Public Health, the University of Tokyo, Bunkyo-ku, Tokyo, 113-0033 Japan
| | - Miki Bundo
- 0000 0001 0660 6749grid.274841.cDepartment of Molecular Brain Science, Graduate School of Life Sciences, Kumamoto University, 1-1-1 Honjo, Kumamoto City, Kumamoto, 860-8556 Japan
| | - Kazuya Iwamoto
- 0000 0001 0660 6749grid.274841.cDepartment of Molecular Brain Science, Graduate School of Life Sciences, Kumamoto University, 1-1-1 Honjo, Kumamoto City, Kumamoto, 860-8556 Japan
| | - Chihiro Kakiuchi
- 0000 0001 2151 536Xgrid.26999.3dDepartment of Neuropsychiatry, Graduate School of Medicine, the University of Tokyo, Bunkyo-ku, Tokyo, 113-8655 Japan
| | - Kiyoto Kasai
- 0000 0001 2151 536Xgrid.26999.3dDepartment of Neuropsychiatry, Graduate School of Medicine, the University of Tokyo, Bunkyo-ku, Tokyo, 113-8655 Japan ,0000 0001 2151 536Xgrid.26999.3dInternational Research Center for Neurointelligence, The University of Tokyo, Bunkyo-ku, Tokyo, 113-0033 Japan
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5
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Satomura Y, Sakakibara E, Takizawa R, Koike S, Nishimura Y, Sakurada H, Yamagishi M, Shimojo C, Kawasaki S, Okada N, Matsuoka J, Kinoshita A, Jinde S, Kondo S, Kasai K. Severity-dependent and -independent brain regions of major depressive disorder: A long-term longitudinal near-infrared spectroscopy study. J Affect Disord 2019; 243:249-254. [PMID: 30248636 DOI: 10.1016/j.jad.2018.09.029] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/05/2018] [Revised: 08/12/2018] [Accepted: 09/15/2018] [Indexed: 11/29/2022]
Abstract
BACKGROUND Long-term longitudinal studies are necessary to establish neuroimaging indicators which contribute to the detection of severity changes over time in patients with major depressive disorder (MDD). METHODS One hundred sixty-five patients with MDD underwent clinical assessments and near-infrared spectroscopy (NIRS) examination at the initial evaluation (T0). After 1.5 years, 45 patients who visited for the follow-up evaluation (T1.5) were included in the analysis. The authors conducted analyses using the 17-item Hamilton Rating Scale for Depression (HAMD) scores and mean oxy-hemoglobin concentration ([oxy-Hb]) changes during a cognitive task in NIRS at T0 (T0_HAMD, T0_[oxy-Hb]) and at T1.5 (T1.5_HAMD, T1.5_[oxy-Hb]), and their intra-individual longitudinal changes (ΔHAMD = T1.5_HAMD - T0_HAMD, Δ[oxy-Hb] = T1.5_[oxy-Hb] - T0_[oxy-Hb]). RESULTS For severity-dependent regions, the Δ[oxy-Hb] in the right inferior frontal gyrus (IFG) was negatively correlated with the ΔHAMD. For severity-independent regions, the intra-class correlation coefficients between T0_ and T1.5_[oxy-Hb] were moderate in the bilateral middle frontal gyri (MFG). LIMITATIONS The percentage of patients included in the follow-up examination was relatively small. CONCLUSIONS Brain activation in the right IFG and the bilateral MFG as measured by NIRS may differentially indicate clinical severity and trait-related abnormalities in MDD.
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Key Words
- Abbreviations: MDD, major depressive disorder
- Biological marker
- CBF, cerebral blood flow
- CH, channel
- DSM-IV, Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition
- FDR, false-discovery rate
- GAF, Global Assessment of Functioning
- HAMD, Hamilton Rating Scale for Depression
- ICCs, intra-class correlation coefficients
- IFG, inferior frontal gyrus
- IQ, Intelligence Quotient
- JART, Japanese Adult Reading Test
- Long-term longitudinal study
- MFG, middle frontal gyrus
- MRI, magnetic resonance imaging
- Major depressive disorder (MDD)
- Mood disorder
- NIRS, near-infrared spectroscopy
- Near-infrared spectroscopy (NIRS)
- PET, positron emission tomography
- PFC, prefrontal cortex
- SCID, Structured Clinical Interview for DSM-IV
- VFT, verbal fluency test
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Affiliation(s)
- Yoshihiro Satomura
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-8655, Japan.
| | - Eisuke Sakakibara
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-8655, Japan.
| | - Ryu Takizawa
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-8655, Japan; Department of Clinical Psychology, Graduate School of Education, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan; MRC Social, Genetic and Developmental Psychiatry Centre, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London SE5 8AF, UK.
| | - Shinsuke Koike
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-8655, Japan; University of Tokyo Institute for Diversity & Adaptation of Human Mind (UTIDAHM), 3-8-1 Komaba, Meguro-ku, Tokyo 153-8902, Japan; Center for Evolutionary Cognitive Sciences, Graduate School of Art and Sciences, The University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153-8902, Japan.
| | - Yukika Nishimura
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-8655, Japan.
| | - Hanako Sakurada
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-8655, Japan.
| | - Mika Yamagishi
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-8655, Japan.
| | - Chie Shimojo
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-8655, Japan
| | - Shingo Kawasaki
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-8655, Japan; Application Development Office, Hitachi Medical Corporation, 2-1 Shintoyofuta, Kashiwa City, Chiba 277-0804, Japan.
| | - Naohiro Okada
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-8655, Japan.
| | - Jun Matsuoka
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-8655, Japan
| | - Akihide Kinoshita
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-8655, Japan.
| | - Seiichiro Jinde
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-8655, Japan.
| | - Shinsuke Kondo
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-8655, Japan.
| | - Kiyoto Kasai
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-8655, Japan.
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6
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Shimizu M, Ohmori M, Taomoto Y, Kaneda T, Yamakami Y, Iiya M, Shimada H, Manno T, Fujii H, Suzuki M, Yamawake N, Nishizaki M, Sakurada H, Hiraoka M. P4727T-wave amplitude in aVR for left ventricular dyssynchrony in patients with complete left bundle branch block. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy563.p4727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- M Shimizu
- Yokohama Minami Kyosai Hospital, Department of Cardiology, Yokohama, Japan
| | - M Ohmori
- Yokohama Minami Kyosai Hospital, Department of Cardiology, Yokohama, Japan
| | - Y Taomoto
- Yokohama Minami Kyosai Hospital, Department of Cardiology, Yokohama, Japan
| | - T Kaneda
- Yokohama Minami Kyosai Hospital, Department of Cardiology, Yokohama, Japan
| | - Y Yamakami
- Yokohama Minami Kyosai Hospital, Department of Cardiology, Yokohama, Japan
| | - M Iiya
- Yokohama Minami Kyosai Hospital, Department of Cardiology, Yokohama, Japan
| | - H Shimada
- Yokohama Minami Kyosai Hospital, Department of Cardiology, Yokohama, Japan
| | - T Manno
- Yokohama Minami Kyosai Hospital, Department of Cardiology, Yokohama, Japan
| | - H Fujii
- Yokohama Minami Kyosai Hospital, Department of Cardiology, Yokohama, Japan
| | - M Suzuki
- Yokohama Minami Kyosai Hospital, Department of Cardiology, Yokohama, Japan
| | - N Yamawake
- Yokohama Minami Kyosai Hospital, Department of Cardiology, Yokohama, Japan
| | | | - H Sakurada
- Tokyo Metropolitan Okubo Hospital, Tokyo, Japan
| | - M Hiraoka
- Tokyo Medical and Dental University, Tokyo, Japan
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7
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Sakurada H, Yasuhara K, Kato K, Asano S, Yoshida M, Yamamura M, Tachi T, Teramachi H. An investigation of visual hallucinations associated with voriconazole administration to patients with hematological malignancies. Pharmazie 2018; 71:660-664. [PMID: 29441972 DOI: 10.1691/ph.2016.6725] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 09/29/2022]
Abstract
Voriconazole (VRCZ) is commonly administered to treat fungal infections in patients with hematological malignancies. Some of these patients experience VRCZ-associated visual hallucinations. We conducted a retrospective survey to investigate the characteristic features of this side effect. Patients with hematological malignancies who were treated with VRCZ for a fungal infection after hospitalization at Ichinomiya municipal hospital between 1 October 2005 and 31 December 2015 were included in this study (n = 103). Fifteen of these (14.6%) reported visual hallucinations that started on day 1-7. Seven of these 15 patients developed this symptom rapidly (day 1 or 2). Three patients had transient symptoms (lasting 2-12 days), 6 patients experienced hallucinations throughout the treatment, and the duration was unknown in 6 patients. Eleven patients experienced visual hallucinations when their eyes were closed (73 %) and these disappeared when they opened their eyes. One patient had visual hallucinations with open eyes, while the state of the eyes was unknown in 3 patients. The patients saw a range of images including people, animals, landscapes, and foods; several reported seeing images like those found in movies. In addition, 9 of 15 patients (60%) with visual hallucinations had visual disturbances. This was a higher proportion than that observed in patients who did not develop hallucinations (17 of 88; 19.3 %; P < 0.05). However, we found no significant difference between the blood VCRZ concentrations of patients who developed or did not develop visual hallucinations. This study indicated that most of these patients had visual hallucinations that manifested on eye closure, and they did not progress to serious mental illness. Our findings emphasized the importance of fully explaining the features of this symptom to each patient prior to starting VRCZ administration in order to reduce anxiety. In addition, since VRCZ discontinuation will compromise patient management, therapeutic drug monitoring should be used to increase the likelihood of successful therapy.
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8
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Koike S, Satomura Y, Kawasaki S, Nishimura Y, Kinoshita A, Sakurada H, Yamagishi M, Ichikawa E, Matsuoka J, Okada N, Takizawa R, Kasai K. Application of functional near infrared spectroscopy as supplementary examination for diagnosis of clinical stages of psychosis spectrum. Psychiatry Clin Neurosci 2017; 71:794-806. [PMID: 28692185 DOI: 10.1111/pcn.12551] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/12/2017] [Revised: 06/28/2017] [Accepted: 07/05/2017] [Indexed: 12/18/2022]
Abstract
AIM Research efforts aiming at neuroimaging-aided differential diagnosis for psychiatric disorders have been progressing rapidly. A previous multisite study has developed a supplementary diagnostic system using functional near-infrared spectroscopy (fNIRS) that can be easily applied to clinical settings. However, few neuroimaging biomarkers have been developed for the psychosis spectrum with various clinical stages. METHODS We employed the fNIRS as a clinical examination device for 143 participants, comprising 47 ultra-high risk for psychosis (UHR) individuals, 30 patients with first-episode psychosis (FEP), 34 patients with chronic schizophrenia (ChSZ), and 33 healthy controls, who were independent of the previous study. A 12-month follow-up measurement was also carried out on 34 UHR individuals (72%), 21 patients with FEP (70%), and 33 controls. The fNIRS algorithm variables used for classification were the intensity and timing of prefrontal activation following the start of the cognitive task as used in the previous multisite study. RESULTS The discrimination rate by timing of activation was modest but it became acceptable after adjusting confounding factors. Discrimination by intensity of activation was not improved by similar adjustment. A total of 63.8%, 86.7%, and 81.3% patients were classified as UHR, FEP, and ChSZ, respectively; and 85.1%, 86.7%, and 71.9% of patients in these groups, respectively, were classified as being on the psychosis spectrum. In the follow-up measurement, 88.2% of individuals with UHR and 95.0% of patients with FEP were successfully classified into the psychosis spectrum group. CONCLUSION The fNIRS for supplementary clinical examination could be validly applied to differentiating people with the psychosis spectrum in various clinical stages. The fNIRS is a candidate biological marker for aiding diagnosis of psychosis spectrum in routine clinical settings.
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Affiliation(s)
- Shinsuke Koike
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo.,University of Tokyo Institute for Diversity & Adaptation of Human Mind (UTIDAHM).,Center for Evolutionary Cognitive Sciences, Graduate School of Art and Sciences, The University of Tokyo, Tokyo
| | - Yoshihiro Satomura
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo
| | - Shingo Kawasaki
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo.,Application Development Office, Hitachi Medical Corporation, Chiba, Japan
| | - Yukika Nishimura
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo
| | - Akihide Kinoshita
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo
| | - Hanako Sakurada
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo
| | - Mika Yamagishi
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo
| | - Eriko Ichikawa
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo
| | - Jun Matsuoka
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo
| | - Naohiro Okada
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo
| | - Ryu Takizawa
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo
| | - Kiyoto Kasai
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo
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Sato Y, Shimizu M, Taomoto Y, Amemiya M, Iiya M, Yamakami Y, Nakamura R, Nakano K, Shimada H, Fujii H, Yamawake N, Nishizaki M, Sakurada H, Hiraoka M. P6427The prognostic value of high-frequency component in holter electrocardiograms on lethal arrhythmia in patients with vasospastic angina. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx493.p6427] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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10
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Shimizu M, Taomoto Y, Amemiya M, Yamakami Y, Sato Y, Iiya M, Nakamura R, Nakano K, Shimada H, Fujii H, Yamawake N, Nishizaki M, Sakurada H, Hiraoka M. P881Diagnostic performance of T-axis deviation on 12-leads electrocardiography for myocardial ischemia: Analysis by semiconductor SPECT. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx501.p881] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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11
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Shimizu M, Taomoto Y, Amemiya M, Yamakami Y, Sato Y, Iiya M, Nakamura R, Nakano K, Shimada H, Fujii H, Yamawake N, Nishizaki M, Sakurada H, Hiraoka M. P1458Prognostic value of T wave axis deviation for left ventricular dysfunction in patients with complete left bundle branch block. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx502.p1458] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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12
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Hojo R, Fukamizu S, Miyazawa S, Nakada A, Kawamura I, Nagamine S, Masuda S, Tuchiyama T, Komiyama K, Shibui T, Nishizaki M, Sakurada H, Hiraoka M. P2662The relationship between obstructive sleep apnea and recurrence of atrial fibrillation after pulmonary vein isolation with contact-force sensing catheter. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx502.p2662] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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13
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Miyazawa S, Fukamizu S, Miyahara D, Inagaki D, Kawamura I, Nagamine S, Masuda S, Hojo R, Tsuchiyama T, Komiyama K, Shibui T, Nishizaki M, Sakurada H, Hiraoka M. P815Durability of pulmonary vein isolation for paroxysmal atrial fibrillation using contact force-sensing radiofrequency versus cryoballoon ablation. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx501.p815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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14
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Sakakibara E, Homae F, Kawasaki S, Nishimura Y, Takizawa R, Koike S, Kinoshita A, Sakurada H, Yamagishi M, Nishimura F, Yoshikawa A, Inai A, Nishioka M, Eriguchi Y, Matsuoka J, Satomura Y, Okada N, Kakiuchi C, Araki T, Kan C, Umeda M, Shimazu A, Uga M, Dan I, Hashimoto H, Kawakami N, Kasai K. Detection of resting state functional connectivity using partial correlation analysis: A study using multi-distance and whole-head probe near-infrared spectroscopy. Neuroimage 2016; 142:590-601. [PMID: 27521742 DOI: 10.1016/j.neuroimage.2016.08.011] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2016] [Revised: 08/05/2016] [Accepted: 08/08/2016] [Indexed: 11/30/2022] Open
Abstract
Multichannel near-infrared spectroscopy (NIRS) is a functional neuroimaging modality that enables easy-to-use and noninvasive measurement of changes in blood oxygenation levels. We developed a clinically-applicable method for estimating resting state functional connectivity (RSFC) with NIRS using a partial correlation analysis to reduce the influence of extraneural components. Using a multi-distance probe arrangement NIRS, we measured resting state brain activity for 8min in 17 healthy participants. Independent component analysis was used to extract shallow and deep signals from the original NIRS data. Pearson's correlation calculated from original signals was significantly higher than that calculated from deep signals, while partial correlation calculated from original signals was comparable to that calculated from deep (cerebral-tissue) signals alone. To further test the validity of our method, we also measured 8min of resting state brain activity using a whole-head NIRS arrangement consisting of 17 cortical regions in 80 healthy participants. Significant RSFC between neighboring, interhemispheric homologous, and some distant ipsilateral brain region pairs was revealed. Additionally, females exhibited higher RSFC between interhemispheric occipital region-pairs, in addition to higher connectivity between some ipsilateral pairs in the left hemisphere, when compared to males. The combined results of the two component experiments indicate that partial correlation analysis is effective in reducing the influence of extracerebral signals, and that NIRS is able to detect well-described resting state networks and sex-related differences in RSFC.
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Affiliation(s)
- Eisuke Sakakibara
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan.
| | - Fumitaka Homae
- Department of Language Sciences, Tokyo Metropolitan University, Tokyo, Japan
| | - Shingo Kawasaki
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan; Hitachi Medical Corporation, Application Development Office, Tokyo, Japan
| | - Yukika Nishimura
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Ryu Takizawa
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Shinsuke Koike
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan; Office for Mental Health Support, Division for Counseling and Support, The University of Tokyo, Tokyo, Japan
| | - Akihide Kinoshita
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Hanako Sakurada
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Mika Yamagishi
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Fumichika Nishimura
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Akane Yoshikawa
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Aya Inai
- Department of Child Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Masaki Nishioka
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan; Department of Molecular Psychiatry, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Yosuke Eriguchi
- Department of Child Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Jun Matsuoka
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Yoshihiro Satomura
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Naohiro Okada
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Chihiro Kakiuchi
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Tsuyoshi Araki
- Department of Youth Mental Health, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Chiemi Kan
- Department of Mental Health, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Maki Umeda
- Graduate School of Nursing Science, St. Luke's International University, Tokyo, Japan
| | - Akihito Shimazu
- Department of Mental Health, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Minako Uga
- Center for Development of Advanced Medical Technology, Jichi Medical University, Tochigi, Japan; Faculty of Science and Engineering, Chuo University, Tokyo, Japan
| | - Ippeita Dan
- Faculty of Science and Engineering, Chuo University, Tokyo, Japan
| | - Hideki Hashimoto
- Department of Health Economics & Epidemiology Research, School of Public Health, The University of Tokyo, Tokyo, Japan
| | - Norito Kawakami
- Department of Mental Health, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Kiyoto Kasai
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
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15
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Kawasaki S, Nishimura Y, Takizawa R, Koike S, Kinoshita A, Satomura Y, Sakakibara E, Sakurada H, Yamagishi M, Nishimura F, Yoshikawa A, Inai A, Nishioka M, Eriguchi Y, Kakiuchi C, Araki T, Kan C, Umeda M, Shimazu A, Hashimoto H, Kawakami N, Kasai K. Using social epidemiology and neuroscience to explore the relationship between job stress and frontotemporal cortex activity among workers. Soc Neurosci 2015; 10:230-42. [DOI: 10.1080/17470919.2014.997370] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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16
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Hojo R, Fukamizu S, Komiyama K, Tanabe Y, Tejima T, Sakurada H. Does obstructive sleep apnea suppress reverse remodeling of left atrium after successful pulmonary vein isolation for atrial fibrillation? Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht310.p5607] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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17
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Tanabe Y, Tejima T, Kitamura T, Hojo R, Komiyama K, Fukamizu S, Sakurada H, Kobayashi Y. Prognosis and antithrombotic therapy of patients with atrial fibrillation after undergoing percutaneous coronary intervention). Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht308.1980] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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18
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Hayashi T, Fukamizu S, Hojo R, Komiyama K, Tanabe Y, Tejima T, Nishizaki M, Hiraoka M, Ako J, Momomura SI, Sakurada H. Prevalence and electrophysiological characteristics of typical atrial flutter in patients with atrial fibrillation and chronic obstructive pulmonary disease. Europace 2013; 15:1777-83. [DOI: 10.1093/europace/eut158] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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19
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Ueda A, Fukamizu S, Soejima K, Tejima T, Nishizaki M, Nitta T, Kobayashi Y, Hiraoka M, Sakurada H. Clinical and electrophysiological characteristics in patients with sustained monomorphic reentrant ventricular tachycardia associated with dilated-phase hypertrophic cardiomyopathy. Europace 2011; 14:734-40. [DOI: 10.1093/europace/eur344] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
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20
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Sekino Y, Fujisawa N, Suzuki K, Akimoto K, Takahata A, Miharada K, Koyama S, Iida H, Endo H, Hosono K, Sakamoto Y, Takahashi H, Koide T, Tokoro C, Abe Y, Maeda S, Nakajima A, Tatsumoto A, Sakurada H, Inamori M. A case of recurrent infective endocarditis following colonoscopy. Endoscopy 2010; 42 Suppl 2:E217. [PMID: 20845280 DOI: 10.1055/s-0030-1255719] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Affiliation(s)
- Y Sekino
- Gastroenterology Division, Yokohama City University Hospital, Kanazawa-ku, Yokohama, Japan
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21
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Mizusawa Y, Sakurada H, Nishizaki M, Ueda-Tatsumoto A, Fukamizu S, Hiraoka M. Characteristics of bundle branch reentrant ventricular tachycardia with a right bundle branch block configuration: feasibility of atrial pacing. Europace 2009; 11:1208-13. [DOI: 10.1093/europace/eup206] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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22
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Okazaki H, Sakurada H, Mizusawa Y, Fukamizu S, Yamaguchi H, Oh J, Tejima T, Nishizaki M, Hiraoka M. P.2.18 Effects of quinidine, aminophylline, and cilostazol for prevention of ventricular fibrillation(VF) induction in patients with brugada syndrome. Europace 2003. [DOI: 10.1016/eupace/4.supplement_1.a43-c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Affiliation(s)
- H. Okazaki
- Department of Cardiology, Tokyo Metropolitan Hiroo General Hospital, Tokyo
| | - H. Sakurada
- Department of Cardiology, Tokyo Metropolitan Hiroo General Hospital, Tokyo
| | - Y. Mizusawa
- Department of Cardiology, Tokyo Metropolitan Hiroo General Hospital, Tokyo
| | - S. Fukamizu
- Department of Cardiology, Tokyo Metropolitan Hiroo General Hospital, Tokyo
| | - H. Yamaguchi
- Department of Cardiology, Tokyo Metropolitan Hiroo General Hospital, Tokyo
| | - J. Oh
- Department of Cardiology, Tokyo Metropolitan Hiroo General Hospital, Tokyo
| | - T. Tejima
- Department of Cardiology, Tokyo Metropolitan Hiroo General Hospital, Tokyo
| | - M. Nishizaki
- Department of Heart Center, Yokohama-Minami Kyousai Hospital, Yokohama
| | - M. Hiraoka
- Institute of Cardiovascular Research, Tokyo Medical and Dental University, Tokyo, Japan
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23
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Nishizaki M, Ashikaga T, Arita M, Yamawake N, Sakurada H, Numano F, Hiraoka M. Case report: alternating exit sites in reentry circuit of ventricular tachycardia with nonischemic cardiomyopathy - relationship between ablation site and inner loop. J Interv Card Electrophysiol 2001; 5:471-5. [PMID: 11752916 DOI: 10.1023/a:1013210415093] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
We present a patient with nonischemic cardiomyopathy who had ventricular tachycardia (VT) with QRS morphology alternans. VTs of two QRS morphologies (VT1 and VT2) exhibiting a right bundle branch block pattern with inferior axis was induced by ventricular pacing. The morphology of the QRS complex during VT1 exhibited more distinctively inferior axis than those during VT2. Induced VTs had similar morphologies to clinically the documented VTs. Pacemapping at anterolateral site of the left ventricle during sinus rhythm produced the same QRS complex of VT1 in a surface 12-lead electrocardiogram. A mapping study was performed with an electrode catheter located at the same site of LV during sustained VT1. The analysis of the local electrograms and postpacing interval during concealed entrainment at the catheter mapping revealed this pacing site was at the inner loop of the reentry circuit. Radiofrequency catheter ablation was performed at this site. The morphology of VT1 changed to different QRS morphology (VT2) during the first delivery of radiofrequency energy and was terminated after 20 seconds of the application. Then VT with alternans of QRS morphology and cycle length of VT1 and VT2 was induced by ventricular pacing, and was abolished by the second application of radiofrequency energy at this same site, suggesting that this site was located in the exit site close to inner loop of the reentry circuit and the alternans of QRS morphology was linked to the change of exit site.
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Affiliation(s)
- M Nishizaki
- Department of Cardiology, Yokohama Minami Kyosai Hospital, Kanagawa, Japan.
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24
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Noda M, Yamaguchi H, Fujii H, Kakuta T, Sarashina M, Sakurada H, Kishi Y, Isobe M, Numano F. Spontaneous regression over a 16-year period of tachyarrhythmias to sick sinus syndrome and complete atrioventricular block in a young patient with Ebstein's anomaly. Pacing Clin Electrophysiol 2001; 24:1158-60. [PMID: 11475834 DOI: 10.1046/j.1460-9592.2001.01158.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
A 25-year-old man with Ebstein's anomaly showed spontaneous regression of tachyarrhythmias to sick sinus syndrome and complete atrioventricular block over a 16-year period. This is the first clinical report supporting the hypothesis that abnormal cell death might contribute to the disturbance of the heart conduction system in Ebstein's anomaly.
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Affiliation(s)
- M Noda
- Third Department of Internal Medicine, Tokyo Medical and Dental University, Tokyo.
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25
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Nishizaki M, Arita M, Sakurada H, Suzuki M, Ashikaga T, Yamawake N, Numano F, Hiraoka M. Polymorphic ventricular tachycardia in patients with vasospastic angina--clinical and electrocardiographic characteristics and long-term outcome. Jpn Circ J 2001; 65:519-25. [PMID: 11407734 DOI: 10.1253/jcj.65.519] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
There have been few clinical studies exploring the characteristics of spontaneous polymorphic ventricular tachycardia (VT) during a vasospastic angina attack. During a 4-year recruitment period, Holter ECG recordings were monitored for 42+/-24 h during a drug-free period in 60 consecutive patients with vasospastic angina (VSA) and of these, 8 patients had at least one episode of polymorphic VT during monitoring. Ischemic ST segment elevation was immediately preceded the spontaneous polymorphic VT in all 8 patients, 4 of whom had silent coronary vasospasm. Immediately before the onset of polymorphic VT, both R-on-T and long-short sequences were observed in 4 of the 8 patients and ST wave alternans were recorded in 2 patients. VT exhibited a pattern of torsade de pointes in 4 of the 8 patients. Five patients underwent electrophysiologic testing during a drug-free asymptomatic phase, and polymorphic VT was induced in 2 of the 5 patients, with one developing ventricular fibrillation. During a follow-up period of 73+/-17 months, there was a significant difference in the incidence of sudden death between patients with and without VT (2/8 cases [25%] vs 0/52 [0%]; p<0.01). Thus, vasospastic attacks, even if asymptomatic, that immediately precede the development of polymorphic VT may be associated with a repolarization abnormality and an increased risk of sudden death.
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Affiliation(s)
- M Nishizaki
- Department of Cardiology, Yokohama Minami Kyosai Hospital, Kanagawa, Japan.
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26
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Ikeda T, Sakurada H, Sakabe K, Sakata T, Takami M, Tezuka N, Nakae T, Noro M, Enjoji Y, Tejima T, Sugi K, Yamaguchi T. Assessment of noninvasive markers in identifying patients at risk in the Brugada syndrome: insight into risk stratification. J Am Coll Cardiol 2001; 37:1628-34. [PMID: 11345376 DOI: 10.1016/s0735-1097(01)01197-4] [Citation(s) in RCA: 158] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
OBJECTIVES The aim of this study was to compare the use of various noninvasive markers for detecting risk of life-threatening arrhythmic events in patients with Brugada syndrome. BACKGROUND The role of conduction disturbance in arrhythmogenesis of the syndrome is controversial, whereas it is well established that repolarization abnormalities are responsible for arrhythmias. The value of noninvasive markers reflecting conduction or repolarization abnormalities in identifying patients at risk for significant arrhythmias has not been shown. METHODS We assessed late potentials (LP) using signal-averaged electrocardiography (ECG), microvolt T-wave alternans (TWA), and corrected QT-interval dispersion (QTD) in 44 consecutive patients who had ECGs showing a pattern of right bundle branch block and ST-segment elevation in leads V1 to V3 but structurally normal hearts. The patients were compared with 30 normal individuals. RESULTS Eleven patients were excluded from data analysis because of an absence of ECG manifestations of Brugada syndrome at the time of the tests. A history of life-threatening events defined as syncope and aborted sudden death was present in 19 of 33 patients (58%); in 15 of the 19 patients, stimulation induced ventricular fibrillation or polymorphic ventricular tachycardia. The LP were present in 24 of 33 patients (73%); TWA were present in 5 of 31 patients (16%); and a QTD >50 ms was present in 9 of 33 patients (27%). The incidence of LP in Brugada patients was significantly (p < 0.0001) higher than in the controls, whereas incidences of TWA and QTD were not significantly different. Multivariate logistic regression analysis revealed that the presence of LP had the most significant correlation to the occurrence of life-threatening events (p = 0.006). CONCLUSIONS Late potentials are a noninvasive risk stratifier in patients with Brugada syndrome. These results may support the idea that conduction disturbance per se is arrhythmogenic.
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Affiliation(s)
- T Ikeda
- Third Department of Internal Medicine, Ohashi Hospital, Toho University School of Medicine, Japan.
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27
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Itoh T, Kikuchi K, Odagawa Y, Takata S, Yano K, Okada S, Haneda N, Ogawa S, Nakano O, Kawahara Y, Kasai H, Nakayama T, Fukutomi T, Sakurada H, Shimizu A, Yazaki Y, Nagai R, Nakamura Y, Tanaka T. Correlation of genetic etiology with response to beta-adrenergic blockade among symptomatic patients with familial long-QT syndrome. J Hum Genet 2001; 46:38-40. [PMID: 11289718 DOI: 10.1007/s100380170123] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Mutations in any of the five genes KCNQ1, KCNH2, KCNE1, KCNE2, and SCN5A can be responsible for familial long QT syndrome (LQTS), an arrhythmogenic disorder that entails a high risk of sudden death. beta-Adrenergic blocking agents are the first therapeutic choice, and 80% of patients treated with these agents show symptomatic relief; however the remaining 20% do not respond well. We previously performed a nationwide analysis of familial long QT syndrome (LQTS) in Japan and identified 32 mutations in the KCNQ1 and KCNH2 genes. In the present retrospective study, we found that patients carrying mutations in the KCNQ1 gene responded better to beta-adrenergic blocking agents than those with KCNH2 mutations (12 of 13 vs 1 of 5; P = 0.0077, Fisher's exact test). This is a good example of the power of genetic diagnosis to direct the selection of appropriate therapy for patients with diseases of heterogeneous genetic etiology.
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Affiliation(s)
- T Itoh
- Laboratory of Molecular Medicine, Human Genome Center, Institute of Medical Science, University of Tokyo, Japan
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28
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Ono K, Watanabe S, Daimon Y, Sakurada H, Urano M, Sun K, Hijikata Y, Inoue T, Masuda Y. Diagnosis of carotid artery atheroma by magnetic resonance imaging. Jpn Circ J 2001; 65:139-44. [PMID: 11266184 DOI: 10.1253/jcj.65.139] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Atheroma appears as a very low signal intensity area on 2-dimensional time-of-flight (TOF) magnetic resonance (MR) images, and its components have various signal intensities on spin-echo (SE) images. The present study investigated atheroma of the carotid arteries in 37 subjects with risk factors (63+/-10 years of age; 19 men) by magnetic resonance imaging (MRI). On 2-dimensional (2D) TOF images, the carotid arteries were clearly demonstrated in all cases and atheroma was detected in 23 patients. The most common location of atheroma was at the origin of the internal carotid artery. There was vascular remodeling in all patients with atheroma. 2D-TOF images showed 97% agreement with ultrasonography. SE images clearly demonstrated atheroma in all 23 patients with atheroma. All patients with atheroma showing high signal intensity on T1-weighted images had hyperlipidemia. These findings indicate that the 2D-TOF imaging method is useful for detecting atheroma and SE-images are useful for its characterization.
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Affiliation(s)
- K Ono
- Third Department of Internal Medicine, Chiba University School of Medicine, Chiba City, Japan
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29
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Inoue T, Watanabe S, Sakurada H, Ono K, Urano M, Hijikata Y, Saito I, Masuda Y. Evaluation of flow volume and flow patterns in the patent false lumen of chronic aortic dissections using velocity-encoded cine magnetic resonance imaging. Jpn Circ J 2000; 64:760-4. [PMID: 11059616 DOI: 10.1253/jcj.64.760] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
In 21 patients with chronic aortic dissections and proven patent false lumens, the flow volume and flow patterns in the patent false lumens was evaluated using velocity-encoded cine magnetic resonance imaging (VENC-MRI) and the relationship between the flow characteristics and aortic enlargement was retrospectively examined. Flow patterns in the false lumen were divided into 3 groups: pattern A with primarily antegrade flow (n=6), pattern R with primarily retrograde flow (n=3), and pattern B with bidirectional flow (n=12). In group A, the rate of flow volume in the false lumen compared to the total flow volume in true and false lumens (%TFV) and the average rate of enlargement of the maximum diameter of the dissected aorta per year (deltaD) were significantly greater than in groups R and B (%TFV: 74.1+/-0.07 vs 15.2+/-0.03 vs 11.8+/-0.04, p<0.01; deltaD: 3.62+/-0.82 vs 0 vs 0.58+/-0.15 mm/year, p<0.05, respectively). There was a significant correlation between %TFV and deltaD (r=0.79, p<0.0001). Evaluation of flow volume and flow patterns in the patent false lumen using VENC-MRI may be useful for predicting enlargement of the dissected aorta.
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Affiliation(s)
- T Inoue
- The Third Department of Internal Medicine, Chiba University School of Medicine, Japan.
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30
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Akai J, Makita N, Sakurada H, Shirai N, Ueda K, Kitabatake A, Nakazawa K, Kimura A, Hiraoka M. A novel SCN5A mutation associated with idiopathic ventricular fibrillation without typical ECG findings of Brugada syndrome. FEBS Lett 2000; 479:29-34. [PMID: 10940383 DOI: 10.1016/s0014-5793(00)01875-5] [Citation(s) in RCA: 98] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
Mutations in the human cardiac Na+ channel alpha subunit gene (SCN5A) are responsible for Brugada syndrome, an idiopathic ventricular fibrillation (IVF) subgroup characterized by right bundle branch block and ST elevation on an electrocardiogram (ECG). However, the molecular basis of IVF in subgroups lacking these ECG findings has not been elucidated. We performed genetic screenings of Japanese IVF patients and found a novel SCN5A missense mutation (S1710L) in one symptomatic IVF patient that did not exhibit the typical Brugada ECG. Heterologously expressed S1710L channels showed marked acceleration in the current decay together with a large hyperpolarizing shift of steady-state inactivation and depolarizing shift of activation. These findings suggest that SCN5A is one of the responsible genes for IVF patients who do not show typical ECG manifestations of the Brugada syndrome.
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Affiliation(s)
- J Akai
- Etiology and Pathogenesis Research Unit, Medical Research Institute, Tokyo Medical and Dental University, Japan
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31
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Kasuya N, Yanase O, Tejima T, Sakurada H, Motomiya T. A 34-year-old man with fever and cardiomegaly. J Cardiol 2000; 35:451-4. [PMID: 10884983] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
Affiliation(s)
- N Kasuya
- Department of Cardiology, Tokyo Metropolitan Hiroo General Hospital
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32
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Hiraoka M, Sakurada H. [Treatment of choice and long-term prognosis for ventricular arrhythmias]. J Cardiol 2000; 35 Suppl 1:69-74. [PMID: 10834173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
Treatment of choice and long-term prognosis of the patients with ventricular arrhythmias are described in terms of prevention of sudden cardiac death and/or recurrence of life-threatening arrhythmias(ventricular tachycardia and ventricular fibrillation). 1) As to the long-term prognosis of ventricular tachyarrhythmias, presence of organic heart disease and degree of cardiac dysfunction are major determining factors. 2) The prognosis of patients with ventricular arrhythmias depends on how sudden cardiac death and life-threatening arrhythmias can be prevented. Among various methods, the electrophysiological test and its guided-therapy for antiarrhythmic drugs are now believed to be the most effective method for the prediction and prevention of the life-threatening events. We propose that the signal averaged electrocardiography is the best screening method as non-invasive approach for the selection of patients undergoing the electrophysiological test. 3) There are still certain limitations as to the prediction of sudden cardiac death and/or prevention of recurrent life-threatening arrhythmias by antiarrhythmic drug treatments in the certain numbers of patients depending on their basal cardiac disease and functional impairment. At present, catheter ablation procedure and implantable cardioverter defibrillator are the choice of the treatment in these cases. 4) In addition to conventional antiarrhythmic drugs, the treatment for the basal cardiac condition is mandatory for the long-term prognosis in the patients with ventricular arrhythmias.
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Affiliation(s)
- M Hiraoka
- Department of Cardiovascular Diseases, Medical Research Institute, Tokyo Medical and Dental University
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33
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Nakajima T, Furukawa T, Hirano Y, Tanaka T, Sakurada H, Takahashi T, Nagai R, Itoh T, Katayama Y, Nakamura Y, Hiraoka M. Voltage-shift of the current activation in HERG S4 mutation (R534C) in LQT2. Cardiovasc Res 1999; 44:283-93. [PMID: 10690305 DOI: 10.1016/s0008-6363(99)00195-9] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
OBJECTIVE Recently, a novel missense mutation (R534C) in the S4 region of human ether-a-go-go-related gene (HERG) was identified in one Japanese LQT2 family. The S4 region presumably functions as a voltage sensor. However, it has not yet been addressed whether the S4 region of HERG indeed functions as a voltage sensor, and whether these residues play any role in abnormal channel function in cardiac repolarization. METHODS We characterized the electrophysiological properties of the R534C mutation using the heterologous expression system in Xenopus oocytes. Whole cell currents were recorded in oocytes injected with wild-type cRNA, R534C cRNA, or a combination of both. RESULTS Clinical features--QTc intervals of all affected patients with R534C mutation in HERG are prolonged ranging from 460 to 680 ms (averaged QTc interval > 540 ms). One member of this family had experienced sudden cardiac arrest, and other suffered from recurrent palpitation. Electrophysiology--Oocytes injected with R534C cRNA did express functional channels with altered channel gating. Kinetic analyses revealed that the R534C mutation shifted the voltage-dependence of HERG channel activation to a negative direction, accelerated activation and deactivation time course, and reduced steady-state inactivation. Quantitative analyses revealed that this mutation did not cause apparent dominant-negative suppression. Computer simulation--Incorporating the kinetic alterations of R534C, however, did not reproduce prolonged action potential duration (APD). CONCLUSIONS The data revealed that arginine at position 534 in the S4 region of HERG is indeed involved in voltage-dependence of channel activation as a voltage sensor. Our examination indicated that HERG current suppression in R534C mutation was the least severe among other mutations that have been electrophysiologically examined, while affected patients did show significant QT prolongation. This suggest that another unidentified factor(s) that prolong APD might be present.
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Affiliation(s)
- T Nakajima
- Department of Cardiovascular Disease, Tokyo Medical and Dental University, Japan
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34
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Nishijima S, Konno M, Sakurada H. [The effects of propofol anesthesia with or without the use of nitrous oxide on the intraoperative involuntary movement, the postoperative awareness and vomiting]. Masui 1999; 48:1216-9. [PMID: 10586554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/14/2023]
Abstract
The authors investigated the effect of anesthesia with nitrous oxide and propofol on intraoperative involuntary movement, muscle relaxant usage, postoperative nausea and vomiting, the total amount of propofol used, and recovery time from anesthesia. Eighty-eight patients for gynecological surgery were randomly divided into group PE: propofol/epidural (n = 44), and group PEG: propofol/epidural/nitrous oxide (n = 44). The frequency of postoperative nausea and vomiting were assessed at 24-h postoperatively by blinded observers. There were significant decreases of the mean amounts of propofol and muscle relaxant used between group PEG and group PE. The authors found no correlation between the use of nitrous oxide and intraoperative involuntary movement, subsequent development of postoperative quality of awareness, recovery time, nausea and vomiting. We recommend PEG method for gynecological surgery rather than PE from an economical viewpoint because it is associated with the reduction of mean propofol and muscle relaxant used.
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Affiliation(s)
- S Nishijima
- Department of Anesthesia, Hachinohe Red Cross Hospital
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35
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Izumida N, Asano Y, Hosaki J, Hiyoshi Y, Sakurada H, Motomiya T, Kawano S, Sawanobori T, Hiraoka M. Non-dipolarity of heart potentials estimated by magnetocardiography in normal subjects. Jpn Heart J 1998; 39:731-42. [PMID: 10089935 DOI: 10.1536/ihj.39.731] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
We studied non-dipolarity characteristics during ventricular excitation in normal adults and children by magnetocardiography (MCG) by recording magnetic field on the thorax. The source and currents of the electrical dipole from the onset up to 60 ms of ventricular excitation were analyzed in 16 adults and 5 children. A single equivalent current dipole (ECD) was estimated by Sarvas' formula for the sphere model at 1 ms intervals. The non-dipole value (NDV) was calculated from the magnetic field strength at each recording point and theoretically estimated by ECD, representing an index for the non-dipolarity. At 32-34 ms from the beginning of QRS, the mean NDV was a minimum in all subjects suggesting at least a non-dipole component during this period. High NDV (over 5%) were present in most subjects in both the early and late phase compared to this period. Thirteen of 16 adults had a high NDV in the early phase (9.3 +/- 3.0%, mean +/- SD) and all 16 subjects had a high NDV in the late phase (21.5 +/- 10.5%). All 5 children had high NDV in both the early (10.5 +/- 5.4%) and late phases (16.8 +/- 7.9%). A single ECD estimation by MCG showed a relatively low non dipolar component and MCG could be applied to the clinical evaluation of cardiac excitation in both normal and pathological conditions.
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Affiliation(s)
- N Izumida
- Department of Pediatrics, School of Medicine, Tokyo Medical and Dental University, Japan
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36
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Tejima T, Sakurada H, Okazaki H, Motomiya T, Hiraoka M. Significance of abnormal root mean square voltages in signal averaged electrocardiogram as a reliable predictor of sustained ventricular tachycardia. J Electrocardiol 1998; 31:362-6. [PMID: 9817218 DOI: 10.1016/s0022-0736(98)90021-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
The late potential is useful to predict patients with sustained ventricular tachycardia (VT). However, because positive predictive value for sustained VT is low, the validity of late potential for screening the patients to be studied by electrophysiological tests was not high. We examined 923 cases, including 63 cases of sustained VT. When we separated patients showing abnormal values of the root mean square voltage of the QRS end part 40 milliseconds (RMS40) into four groups, there was a tendency of a higher incidence of sustained VT with lower value of RMS40. When we conducted electrophysiological tests on 121 cases without sustained VT, it turned out a high induction rate of sustained VT in patients with low RMS40 values (RMS40 < 10 microV, 67%; < 20 microV, 30%; 20 microV, < or = 5%). We conclude abnormally low value (less than 10 microV) of RMS40 can be useful for screening the late potential-positive cases who are high risk for inducible sustained VT.
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Affiliation(s)
- T Tejima
- Department of Cardiology, Tokyo Metropolitan Hiroo General Hospital, Japan
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37
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Takahashi T, Yanase O, Sakurada H, Motomiya T. [Cardiovascular imaging in-a-month. A 67-year-old man with recurrent fever after permanent pacemaker replacement. Vegetation on the permanent pacemaker lead]. J Cardiol 1998; 32:205-6. [PMID: 9783242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Affiliation(s)
- T Takahashi
- Department of Cardiology, Tokyo Metropolitan Hiroo General Hospital
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38
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Itoh T, Tanaka T, Nagai R, Kamiya T, Sawayama T, Nakayama T, Tomoike H, Sakurada H, Yazaki Y, Nakamura Y. Genomic organization and mutational analysis of HERG, a gene responsible for familial long QT syndrome. Hum Genet 1998; 102:435-9. [PMID: 9600240 DOI: 10.1007/s004390050717] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Familial long QT syndrome (LQTS) is characterized by prolonged ventricular repolarization. Clinical symptoms include recurrent syncopal attacks, and sudden death may occur as a result of ventricular tachyarrhythmias. Three genes responsible for this syndrome (KVLQT1, HERG, and SCN5A) have been identified so far, and mutations have been reported on the basis of partially characterized genomic organization. To optimize the search for HERG mutations, we have determined the genomic structure of HERG and investigated mutations in LQTS families. Human genomic clones containing the HERG gene were isolated from a human genomic library by using reverse-transcribed polymerase chain reaction (RT-PCR) products from this gene as probes. We determined exon/intron boundaries and flanking intronic sequences by using primers synthesized on the basis of the HERG cDNA sequence available in the DNA database. HERG was shown to consist of 15 exons spanning approximately 19 kb on chromosome 7q35. Subsequently, we synthesized oligonucleotide primers to cover the entire coding region and searched for mutations in 36 Japanese LQTS families. When genomic DNA from each proband was examined by the PCR/single-strand conformation polymorphism technique followed by direct DNA sequencing, five novel mutations were detected. Each mutation was present in affected relatives of the respective proband. This work should increase the efficiency of screening mutations associated with HERG.
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Affiliation(s)
- T Itoh
- Laboratory of Molecular Medicine, Institute of Medical Science, University of Tokyo, Japan
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39
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Ayusawa M, Sakurada H, Hiyoshi Y, Sumitomo N, Okazaki H, Motomiya T, Sugiura M, Hiraoka M. Supernormal conduction in a case of Mobitz type II atrioventricular block. J Electrocardiol 1998; 31:61-5. [PMID: 9533380 DOI: 10.1016/s0022-0736(98)90009-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
A 52-year-old woman exhibited Mobitz type II atrioventricular block with right bundle branch block and 1:1 atrioventricular conduction at or slower than 80 beats/min. Electrophysiologic study revealed transient HV interval block followed by recovery from the block at shorter coupling intervals without prolongation of the H1H2 and H2V2 intervals, suggesting true supernormal conduction. Isoproterenol enhanced the supernormal conduction, with shortening of blocked intervals and recovery of atrioventricular conduction, while atropine caused their less marked enhancement. Linking (ie, retrograde concealment of the impulse to the distal His bundle region through the blocked right bundle branch) is considered a possible mechanism of supernormal conduction in this case.
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Affiliation(s)
- M Ayusawa
- Department of Cardiology, Tokyo Hiroo Metropolitan Hospital, Japan
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40
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Nishizaki M, Arita M, Sakurada H, Ashikaga T, Yamawake N, Numano F, Hiraoka M. Demonstration of Purkinje potential during idiopathic left ventricular tachycardia: a marker for ablation site by transient entrainment. Pacing Clin Electrophysiol 1997; 20:3004-7. [PMID: 9455767 DOI: 10.1111/j.1540-8159.1997.tb05476.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
During VT of QRS morphology with right bundle branch block and left axis deviation in a patient without obvious structural heart disease, entrainment by pacing from the right ventricular outflow tract and high right atrium was demonstrated. During entrainment of VT, a Purkinje potential preceding the QRS and recorded at the left ventricular mid-septum was activated by orthodromic impulses in the reentry circuit. The interval between the Purkinje potential and the earliest left ventricular activation was decrementally prolonged with shortening of pacing cycle length. Radiofrequency energy was applied to this site, resulting in successful elimination of VT. Therefore, the Purkinje potential represented activation by an orthodromic wavefront in the reentry circuit, while the orthodromically distal site to this potential showed an area of slow conduction with decremental property.
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Affiliation(s)
- M Nishizaki
- Department of Cardiology, Yokohama Minami Kyosai Hospital, Kanagawa, Japan
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41
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Soejima K, Akaishi M, Mitamura H, Ogawa S, Sakurada H, Okazaki H, Motomiya T, Hiraoka M. Increase in heart rate after radiofrequency catheter ablation is mediated by parasympathetic nervous withdrawal and related to site of ablation. J Electrocardiol 1997; 30:239-46. [PMID: 9261732 DOI: 10.1016/s0022-0736(97)80009-x] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
To assess the mechanism for the increased sinus rate after radiofrequency catheter ablation performed for atrioventricular nodal reentrant tachycardia (AVNRT), we studied heart rate variability before and after radiofrequency catheter ablation in 17 patients with AVNRT and in 38 patients with an accessory pathway. The accessory pathway was located at the left ventricular free wall, the right ventricular free wall, or the posterior interventricular septum. An increased sinus rate was observed in patients with AVNRT or with the accessory pathway at the posterior septum or left free wall after radiofrequency ablation. In these groups, high-frequency power, root mean square of successive difference and percent of adjacent cycles that were more than 50 ms apart, all of which are indices reflecting parasympathetic nervous activity, were decreased. The ratio of low-frequency to high-frequency power reflecting sympathovagal balance, was increased in patients with AVNRT or with an accessory pathway at the posterior septum or left free wall. Increases in sinus rate were correlated with decreases in high-frequency power, and percent of adjacent cycles more than 50 ms apart that the increase in heart rate was due to parasympathetic nervous withdrawal.
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Affiliation(s)
- K Soejima
- Department of Medicine, Keio University, Tokyo, Japan
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42
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Yajima Y, Miyazaki A, Miyasato S, Tomiya Y, Shibuya D, Ohira S, Sakurada H, Ishii K, Kinoshita T. [A case of giant hepatocellular carcinoma successfully treated by arterial administration of SMANCS]. Gan To Kagaku Ryoho 1996; 23:1325-9. [PMID: 8831747] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
A 68-year-old male was referred to our hospital for the precise examination of a giant hepatic tumor detected in a mass survey. The lesion occupied most of the right hepatic lobe, further advancing to the medial segment of the left lobe. However, hepatic functions were well preserved (ICG K = 0.141). Considering the characteristic images of the lesion with positive anti-HCV and high titer of PIVKA II (0.860 AU/ml), the diagnosis was hepatocellular carcinoma. First arterial administration of SMANCS was performed on May in 1994, followed by 6 successive procedures with an interval of about 2 months (total dosage 36 mg), resulting in remarkable tumor shrinkage and tumor marker normalization. On January in 1995, a metastatic lesion to the right rib was controlled by 2 mg of SMANCS administered to the intercostal artery combined with radiation therapy (60 Gray). Frequent administrations of SMANCS caused no serious complications, and tumor feeders were well preserved. Therefore, arterial administration of SMANCS is thought to be one choice for the therapy of giant HCC with good functional reserve.
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Affiliation(s)
- Y Yajima
- Dept. of Gastroenterology, Sendai City Hospital
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43
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Sakurada H, Okazaki H, Motomiya T, Hiraoka M. Catheter ablation for the common type of atrioventricular nodal reentrant tachycardia. Jpn Heart J 1996; 37:751-8. [PMID: 8973387 DOI: 10.1536/ihj.37.751] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Radiofrequency (RF) catheter ablation of the slow AV nodal pathway was attempted in 34 patients with common type of AV nodal reentrant tachycardia (AVNRT). Radiofrequency energy of 18-32 watts was applied for 30-60 seconds at sites exhibiting atrial-slow pathway potentials or slow potentials. These potentials were recorded at the mid or posterior septum, anterior to the coronary sinus ostium. A mean of two radiofrequency applications successfully eliminated AVNRT in all patients. The incidence of junctional ectopy was significantly higher during 34 effective applications of radiofrequency energy than during 36 ineffective applications (100% versus 17%). Thus, the recording of atrial-slow pathway potentials or slow potentials, and the development of junctional ectopy can be used as a marker for successful ablation. Slow AV nodal conduction was eliminated in 22 patients and persisted without inducible AVNRT in 12. None of the patients had recurrences of AVNRT over a mean follow-up interval of 12 months, and all had preserved AV conduction. Long-term follow-up studies with an electrophysiological method confirmed that the ablation was effective. Transient AV block was observed in only 1 patient, and no major complications were noted. Thus, radiofrequency catheter ablation of the slow AV nodal pathway is highly effective and safe, with a low rate of complication, for the treatment of common type of AVNRT.
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Affiliation(s)
- H Sakurada
- Department of Cardiology, Tokyo Metropolitan Hiroo Hospital, Japan
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44
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Abstract
A 78-year-old man presented with an esophageal polyp that was confirmed by immunohistochemistry and electron microscopy to be malignant fibrous histiocytoma. The tumor was comprised of a proliferation of spindle-shaped cells admixed with bizarre giant cells. These tumor cells were immunoreactive for smooth muscle actin, vimentin, alpha-1-anti-chymotrypsin and CD68. Electron microscopic examination revealed the myofibroblastic and histiocytic features of the tumor cells. No elements of epithelial or myogenic differentiation were found in the tumor. Malignant fibrous histiocytoma of the esophagus is extremely rare, with 10 cases being documented so far in the literature. The differential diagnosis of pleomorphic tumors of the esophagus is discussed.
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Affiliation(s)
- H Naganuma
- Department of Pathology, Sendai City Hospital, Japan
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Nishizaki M, Arita M, Sakurada H, Suzuki M, Ashikaga T, Yamawake N, Numano J, Hiraoka M. Induction of polymorphic ventricular tachycardia by programmed ventricular stimulation in vasospastic angina pectoris. Am J Cardiol 1996; 77:355-60. [PMID: 8602562 DOI: 10.1016/s0002-9149(97)89363-0] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
This study was designed to examine the ventricular vulnerability of patients with vasospastic angina. Fourteen patients (mean age 57 +/- 9 years) with vasospastic angina underwent electrophysiologic testing during the asymptomatic phase (baseline) and after the relief of acetylcholine-induced spasm with isosorbide dinitrates. Twenty patients without structural heart disease served as a control group. By programmed ventricular stimulation, polymorphic ventricular tachycardia (VT) was induced at baseline in 6 of 14 patients, with 1 patient developing ventricular fibrillation and 7 of 14 patients developing repetitive ventricular responses. After isosorbide dinitrate, polymorphic VT was induced in only 1 patient who had ventricular fibrillation at baseline. Repetitive ventricular responses were induced in 3 of 5 patients who had VT at baseline and in 4 of the 7 patients with repetitive ventricular responses at baseline. There was a significant difference in the incidences and severity of induced ventricular arrhythmias between the 2 phases (p <0.01). Among 20 control subjects, repetitive ventricular responses were induced only in 6 patients, but no VT was induced. There was a significant difference in the incidence of induced ventricular arrhythmias and VT at baseline between the vasospastic angina and control groups (p <0.001 and <0.01, respectively). Thus, patients with vasospastic angina had increased ventricular vulnerability, even during the symptom-free period without ischemic events, which could predispose to the development of life-threatening arrhythmias aggravated by vasospastic attacks.
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Affiliation(s)
- M Nishizaki
- Department of Cardiology, Yokohama Minami Kyosai Hospital, Tokyo, Japan
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46
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Nomura S, Nishikawa K, Motomiya T, Tokuyasu Y, Sakurada H, Yanase O, Tejima T, Morimoto O, Sugiura M, Tanaka M. [Tricuspid and mitral regurgitation due to congenital hypoplasia of atrioventricular valves in the aged: a case report]. J Cardiol 1996; 27 Suppl 2:73-7. [PMID: 9067821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
A 76-year-old woman with a history of repeated right-sided cardiac failure during the past 2 years presented with tricuspid and mitral regurgitation due to congenital hypoplasia of atrioventricular valves. Two-dimensional echocardiography demonstrated enlarged right atrium and right ventricle, and discoaptation between the leaflets. Color Doppler echocardiography revealed severe tricuspid regurgitation through the gap between the leaflets. Autopsy showed congenital hypoplasia of the leaflets and the chordae tendineae in the tricuspid and mitral valvular apparatus.
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Affiliation(s)
- S Nomura
- Division of Cardiology, Tokyo Metropolitan Hiroo General Hospital
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47
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Matsumura A, Yanase O, Motomiya T, Tokuyasu Y, Sakurada H, Nomura S, Teshima T, Hiyoshi Y, Sugiura M. A case of cardiac sarcoidosis with remarkable atrophy of the left ventricular septum on two-dimensional echocardiography. Clin Cardiol 1995; 18:234-5. [PMID: 7788953 DOI: 10.1002/clc.4960180412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
Sarcoidosis is a multisystem granulomatous disorder of unknown etiology which mainly affects the lungs, skin, the lymphoreticular system, and the heart. We report a case of cardiac sarcoidosis in which a remarkably thin ventricular septum was demonstrated on two-dimensional echocardiography.
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Affiliation(s)
- A Matsumura
- Department of Cardiology, Tokyo Metropolitan Hiroo General Hospital, Japan
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48
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Nishizaki M, Arita M, Sakurada H, Ohta T, Yamawake N, Numano F, Hiraoka M. Long-term follow-up of the reproducibility of carotid sinus hypersensitivity in patients with carotid sinus syndrome. Jpn Circ J 1995; 59:33-9. [PMID: 7752443 DOI: 10.1253/jcj.59.33] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The reproducibility of carotid sinus hypersensitivity to carotid sinus massage was studied in the long-term follow-up of 8 patients with carotid sinus syndrome. A cardioinhibitory response was induced in 7 patients, while a vasodepressor response was found in the remaining patient. The 7 patients were treated with dual-chamber pacemaker implantation and the remaining patient was treated with propranolol. All of the patients remained asymptomatic during a follow-up period of 48 +/- 11 months. Carotid sinus massage during the follow-up period in patients with a cardioinhibitory response revealed asystolic intervals of 3 s or longer in 4 patients and in 3 patients at the second and third follow-up examinations, respectively, although there were no significant differences in the ventricular asystolic intervals between before, and 34 +/- 11 months and 48 +/- 11 months after treatment. However, each patient showed a wide variation in asystolic intervals. The differences in asystolic intervals between prior to treatment (first) and the third test were significantly greater than those between the first and the second test (2.4 +/- 1.2 s vs 0.7 +/- 0.6 s; p < 0.05). The one patient with a vasodepressor response had a decreased systolic blood pressure greater than 50 mmHg by carotid sinus massage at all three occasions. In conclusion, most patients with carotid sinus syndrome showed abnormal and variable responses to carotid sinus massage during long-term follow-up period although there was no recurrence of symptoms after treatments.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- M Nishizaki
- Department of Cardiology Yokohama Minami Kyosai Hospital, Kanagawa, Japan
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Ichiki H, Sakurada H, Kamo N, Takahashi TA, Sekiguchi S. Generation of active oxygens, cell deformation and membrane potential changes upon UV-B irradiation in human blood cells. Biol Pharm Bull 1994; 17:1065-9. [PMID: 7820109 DOI: 10.1248/bpb.17.1065] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
The generation of peroxides (presumably hydrogen peroxide) by UV-B irradiation of human blood cells was detected. Non-fluorescent dihydrorhodamine 123 (DHR) is oxidized to fluorescent rhodamine 123 (R123) by H2O2 or peroxides with a stoichiometry of 1:1 in the presence of exogeneous peroxidase, and the fluorescence of R123 within the cells was measured using flow-cytometry. UV irradiation gave rise to changes in the cellular volume and the membrane potential, whose extent and direction were dependent on the type of blood cells. The production of peroxides (H2O2) in polymorphonuclear leukocytes is the largest among blood cells at the lower dose (< 0.1 J/cm2), and the production decreases with an increase in the dose, while the production in platelets is the smallest at the lower dose, but above 0.4 J/cm2 it increases suddenly so that at the higher dose (1.2 J/cm2) it amounts to 3.3 x 10(-16) mol/cell. For monocytes and lymphocytes, the production increases gradually with the increase in the dose.
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Affiliation(s)
- H Ichiki
- Laboratory of Biophysical Chemistry, Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo, Japan
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Miyazaki A, Yajima Y, Meguro S, Oohira S, Shibuya D, Sakurada H, Naganuma H. [A case of schistosomiasis japonica diagnosed by the strip biopsy of an early gastric cancer (II a)]. Nihon Shokakibyo Gakkai Zasshi 1994; 91:188-92. [PMID: 8114325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- A Miyazaki
- Department of Gastroenterology, Sendai City Hospital
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