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Boässon MP, Rienks R, van der Ven A, van Hulst RA. Arrhythmogenicity of scuba diving: Holter monitoring in a hyperbaric environment. Undersea Hyperb Med 2019; 46:421-427. [PMID: 31509898] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
INTRODUCTION About 26% of diving-related fatalities are caused by cardiac disease, part of which might be associated with fatal arrhythmias. This raises the question as to whether fatal arrhythmias are being provoked by hyperbaric conditions themselves or if exercise or stress provokes the fatal arrhythmias in cases of underlying (ischemic) cardiac disease. OBJECTIVE To measure the influence of hyperbaric conditions (50 msw) on cardiac conduction and arrhythmias in professional divers by means of ECG. METHODS This is a prospective study on military divers in a hyperbaric chamber with continuous ECG monitoring using Holter registrations. Supraventricular and ventricular ectopy was registered during hyperbaric conditions. RR, PR, QRS, QT and QTc intervals were calculated at 50 msw and compared with ECGs at rest. RESULTS Included were 17 male military divers who made 20 dives. A total of 10 PVCs, 45 PACs, four atrial runs and four atrial pairs were seen. Significant prolongation of the PR interval was seen and a decrease of in QRS duration at 50 msw. There was no significant change in the RR, QT and QTc intervals. CONCLUSION In these divers, no clinically relevant arrhythmias were observed during wet dives in a recompression chamber at 50 msw. We observed a small prolongation of PR interval that is probably not clinically relevant in divers without any known conduction disorders.
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Affiliation(s)
- M P Boässon
- Department of Cardiology, Meander Medical Center, Amersfoort, The Netherlands
| | - R Rienks
- Department of Cardiology, Central Military Hospital, Utrecht, The Netherlands
| | - A van der Ven
- Diving Medical Center, Royal Netherlands Navy, Den Helder, The Netherlands
- Military Rehabilitation Center, Doorn, The Netherlands
| | - R A van Hulst
- Diving Medical Center, Royal Netherlands Navy, Den Helder, The Netherlands
- Department Hyperbaric and Diving Medicine, Anesthesiology, AMC, Amsterdam, The Netherlands
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Riswari SF, Ma'roef CN, Djauhari H, Kosasih H, Perkasa A, Yudhaputri FA, Artika IM, Williams M, van der Ven A, Myint KS, Alisjahbana B, Ledermann JP, Powers AM, Jaya UA. Study of viremic profile in febrile specimens of chikungunya in Bandung, Indonesia. J Clin Virol 2015; 74:61-5. [PMID: 26679829 DOI: 10.1016/j.jcv.2015.11.017] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [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: 08/13/2015] [Revised: 11/12/2015] [Accepted: 11/15/2015] [Indexed: 10/22/2022]
Abstract
BACKGROUND Data regarding the viremia profile of chikungunya virus (CHIKV) infected patients especially during the pre-febrile period is limited. OBJECTIVE To obtain virological kinetic data on CHIKV infections. STUDY DESIGN A two-week community observation for dengue transmission was conducted in Bandung, Indonesia, from 2005 to 2009. Acute specimens from non-dengue febrile patients were screened by pan-alphavirus conventional RT-PCR. The positives were confirmed for CHIKV RNA by a specific RT-PCR followed by sequencing. Simultaneously these specimens were also cultured in Vero cells and tested for anti-CHIK IgM MAC-ELISA. All the available serial specimens,including the pre-febrile specimens, from confirmed CHIK cases, were tested by virus isolation, RT-PCR, qRT-PCR, and CHIK IgM ELISA. RESULTS There were five laboratory confirmed CHIK cases identified and studied. Among these, viremia was determined to extend from as early as 6 days prior to until 13 days post fever onset. Quantitative RT-PCR showed viremia peaked at or near onset of illness. CONCLUSION In this study, individuals were identified with viremia prior to fever onset and extending beyond the febrile phase. This extended viremic phase has the potential to impact transmission dynamics and thus the public health response to CHIK outbreaks.
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Affiliation(s)
- S F Riswari
- Faculty of Medicine, Universitas Padjadjaran, Bandung, Indonesia.
| | - C N Ma'roef
- Eijkman Institute for Molecular Biology, Jakarta, Indonesia
| | - H Djauhari
- Faculty of Medicine, Universitas Padjadjaran, Bandung, Indonesia
| | - H Kosasih
- Faculty of Medicine, Universitas Padjadjaran, Bandung, Indonesia; Indonesia Research Partnership on Infectious Disease (INA-RESPOND), Jakarta, Indonesia
| | - A Perkasa
- Eijkman Institute for Molecular Biology, Jakarta, Indonesia
| | - F A Yudhaputri
- Eijkman Institute for Molecular Biology, Jakarta, Indonesia
| | - I M Artika
- Eijkman Institute for Molecular Biology, Jakarta, Indonesia; Bogor Agricultural University, Bogor, Indonesia
| | | | - A van der Ven
- Radboud University Medical Center, Nijmegen, The Netherlands
| | - K S Myint
- Eijkman Institute for Molecular Biology, Jakarta, Indonesia
| | - B Alisjahbana
- Faculty of Medicine, Universitas Padjadjaran, Bandung, Indonesia; Hasan Sadikin General Hospital, Bandung, Indonesia
| | - J P Ledermann
- Division of Vector-Borne Diseases, Centers for Disease Control and Prevention, CO, USA
| | - A M Powers
- Division of Vector-Borne Diseases, Centers for Disease Control and Prevention, CO, USA
| | - U A Jaya
- Eijkman-Oxford Clinical Research Unit, Jakarta, Indonesia
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Mothapo KM, Stelma F, Janssen M, Kessels R, Miners S, Verbeek MM, Koopmans P, van der Ven A. Amyloid beta-42 (Aβ-42), neprilysin and cytokine levels. A pilot study in patients with HIV related cognitive impairments. J Neuroimmunol 2015; 282:73-9. [PMID: 25903731 DOI: 10.1016/j.jneuroim.2015.03.017] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [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: 02/02/2015] [Revised: 03/18/2015] [Accepted: 03/20/2015] [Indexed: 01/13/2023]
Abstract
HIV-associated dementia (HAD) is associated with amyloid-beta (Aβ) deposition. This study measured CSF and plasma amyloid beta-42 (Aβ-42), neprilysin (NEP) and cytokine levels in HIV-related cognitive impairments (HCI), HIV normal cognitive functioning (NF) and non-HIV controls. Our data showed a trend towards detectable plasma Aβ-42 levels more frequently in HCI (67%), when compared to NF (29%) and controls (10%). We showed elevated IL-8 levels in CSF of HCI compared to NF, although not significant values. The data from this pilot study indicates that CSF IL-8 and plasma Aβ-42 may be interesting biomarkers for the presence of HCI.
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Affiliation(s)
- K M Mothapo
- Department of Internal Medicine and Nijmegen Institute for Infection, Inflammation and Immunity, Radboud University Medical Center, The Netherlands.
| | - F Stelma
- Department of Virology, Radboud University Nijmegen Medical Center, The Netherlands
| | - M Janssen
- Department of Medical Psychology, Radboud University Nijmegen Medical Center, The Netherlands
| | - R Kessels
- Department of Medical Psychology, Radboud University Nijmegen Medical Center, The Netherlands
| | - S Miners
- Dementia Research Group, University of Bristol, Institute of Clinical Neurosciences, Level 1, Learning and Research, Southmead Hospital, Bristol, UK
| | - M M Verbeek
- Department of Neurology, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands; Department of Laboratory Medicine, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands
| | - P Koopmans
- Department of Internal Medicine and Nijmegen Institute for Infection, Inflammation and Immunity, Radboud University Medical Center, The Netherlands
| | - A van der Ven
- Department of Internal Medicine and Nijmegen Institute for Infection, Inflammation and Immunity, Radboud University Medical Center, The Netherlands
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Kinabo GD, van der Ven A, Msuya LJ, Shayo AM, Schimana W, Ndaro A, van Asten HAGH, Dolmans WMV, Warris A, Hermans PWM. Dynamics of nasopharyngeal bacterial colonisation in HIV-exposed young infants in Tanzania. Trop Med Int Health 2013; 18:286-95. [PMID: 23320622 DOI: 10.1111/tmi.12057] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
OBJECTIVES To estimate the prevalence of nasopharyngeal bacterial colonisation (NPBC) patterns in young Tanzanian HIV-exposed infants and to analyse the influence of maternal NPBC and of the infant's HIV status on the NPBC pattern. METHODS Longitudinal cohort study of neonates born to HIV-infected mothers visiting Kilimanjaro Christian Medical Centre, Tanzania, between 2005 and 2009. Demographic and clinical data and nasopharyngeal bacterial cultures were obtained at the age of 6 weeks, 3 and 6 months, and at one time point, a paired mother-infant nasopharyngeal swab was taken. RESULTS Four hundred and twenty-two swabs were taken from 338 eligible infants. At 6 weeks of age, colonisation rates were 66% for Staphylococcus aureus, 56% for Streptococcus pneumoniae, 50% for Moraxella catarrhalis and 14% for Haemophilus influenzae. Colonisation with S. aureus diminished over time and was more common in HIV-infected infants. S. pneumoniae and H. influenzae colonisation rose over time and was more prevalent in HIV-uninfected children. Co-colonisation of S. pneumoniae with H. influenzae or M. catarrhalis was mostly noticed in HIV-infected infants. S. pneumoniae and M.catarrhalis colonisation of the mother was a risk factor for colonisation in HIV-uninfected infants, while maternal S. aureus colonisation was a risk factor for colonisation in HIV-infected infants. Among the 104 S. pneumoniae isolates, 19F was most prevalent, and 57 (55%) displayed capsular serotypes represented in the 13-valent pneumococcal conjugate vaccine. CONCLUSIONS NPBC was common in Tanzanian HIV-exposed infants. The significant prevalence of pneumococcal vaccine serotypes colonising this paediatric population justifies the use of the 13-valent pneumococcal vaccine to reduce the burden of pneumococcal invasive disease.
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Affiliation(s)
- G D Kinabo
- Department of Pediatrics, Kilimanjaro Christian Medical Centre, Moshi, Tanzania
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Benninghoff J, Grunze H, Schindler C, Genius J, Schloesser RJ, van der Ven A, Dehning S, Wiltfang J, Möller HJ, Rujescu D. Ziprasidone--not haloperidol--induces more de-novo neurogenesis of adult neural stem cells derived from murine hippocampus. Pharmacopsychiatry 2013; 46:10-5. [PMID: 22592505 DOI: 10.1055/s-0032-1311607] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
INTRODUCTION Here, we present a stem-cell based study on the de-novo generation of beta-III-tubulin-positive neurons after treatment with the classic antipsychotic drug haloperidol or after treatment with the second-generation antipsychotic (SGA) ziprasidone. METHODS Adult neural stem cells (ANSC) dissociated from the adult mouse hippocampus were expanded in cell culture with basic fibroblast growth factor (bFGF) and epidermal growth factor (EGF). ANSC differentiated upon withdrawal of EGF and bFGF. RESULTS AND DISCUSSION Ziprasidone generated significantly more beta-III-tubulin-positive neurons than haloperidol during the differentiation of adult neural stem cells isolated from murine hippocampus (ANSC). We assume that this net increase in neurogenesis by ziprasidone relies on this drug's 5-HT1A receptor affinity, which is not present in the haloperidol molecule, since the inactivation by WAY100621 impeded this process. These data could possibly suggest a clinical relevance for studying antipsychotic drugs in the stem cell paradigm employed in this study.
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Affiliation(s)
- J Benninghoff
- Department of Psychiatry, LMU-University of Munich, Munich, Germany. jens.benninghoff @lvr.de
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Abstract
Autoimmune phenomena after immune recovery due to HAART are not frequently described. Recently we found 3 patients with Graves' disease after starting HAART, outnumbering the expected incidence; 13 patients have been reported in the literature up to the present time.A probable relation between immune restoration and development of Graves' disease might be suspected.
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Affiliation(s)
- F Vos
- Department of Endocrinology, Radboud University of Nijmen Medical Centre, The Netherlands.
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Damoiseaux J, van der Ven A, Hermsen R, Telgt D, Roestenberg M, Tervaert JWC, Sauerwein R. Experimental infection with Plasmodium falciparum does not result in the induction of anticardiolipin antibodies in healthy volunteers. Ann Rheum Dis 2006; 64:1804-5. [PMID: 16284355 PMCID: PMC1755301 DOI: 10.1136/ard.2005.039214] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Wulf MWH, van Crevel R, Portier R, Ter Meulen CG, Melchers WJG, van der Ven A, Galama JMD. Toxoplasmosis after renal transplantation: implications of a missed diagnosis. J Clin Microbiol 2005; 43:3544-7. [PMID: 16000502 PMCID: PMC1169141 DOI: 10.1128/jcm.43.7.3544-3547.2005] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.7] [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: 11/20/2022] Open
Abstract
We describe a renal transplant patient with a primary Toxoplasma gondii infection presenting as pneumonitis, with subsequent chorioretinitis and encephalitis. The diagnostic challenges of T. gondii infection in immunocompromised patients are discussed.
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Affiliation(s)
- M W H Wulf
- Department of Medical Microbiology, Radboud University, Nijmegen Medical Center, Nijmegen, The Netherlands.
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Dennesen P, van der Ven A, Blok M, Maessen J, Kessels A, Ramsay G, Bruggeman C. Detection of nonspecific cytomegalovirus antigen in peripheral blood mononuclear cells after coronary bypass surgery. Eur J Clin Microbiol Infect Dis 2001; 20:681-3. [PMID: 11714057 DOI: 10.1007/s100960100584] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- P Dennesen
- Department of Medical Microbiology, University Hospital Maastricht, The Netherlands.
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Halaby T, Boots H, Vermeulen A, van der Ven A, Beguin H, van Hooff H, Jacobs J. Phaeohyphomycosis caused by Alternaria infectoria in a renal transplant recipient. J Clin Microbiol 2001; 39:1952-5. [PMID: 11326020 PMCID: PMC88055 DOI: 10.1128/jcm.39.5.1952-1955.2001] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.1] [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: 11/20/2022] Open
Abstract
We report on a case of phaeohyphomycosis caused by Alternaria infectoria in a renal transplant recipient with pulmonary infiltrates and multiple skin lesions. Diagnosis was based on microscopy and culture of the skin lesions. Treatment consisted of a combination of surgical excision and systemic antifungal therapy, first with itraconazole and subsequently with liposomal amphotericin B, for 39 days. At a 20-month follow-up visit, no recurrence of the skin lesions or the pulmonary infiltrates had occurred.
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Affiliation(s)
- T Halaby
- Departments of Medical Microbiology, Maastricht University Hospital, 6202 AZ, Maastricht, The Netherlands.
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