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  1. Article ; Online: Echocardiographic parameters of cardiac structure and function in the diagnosis of acute myocarditis in adult patients: A systematic review and meta-analysis.

    Khanna, Shaun / Li, Cindy / Amarasekera, Anjalee T / Bhat, Aditya / Chen, Henry H L / Gan, Gary C H / Tan, Timothy C

    Echocardiography (Mount Kisco, N.Y.)

    2024  Volume 41, Issue 2, Page(s) e15760

    Abstract: Background: Transthoracic echocardiography (TTE) plays a key role in the initial work-up of myocarditis where the identification of pathologic structural and functional changes may assist in its diagnosis and management. The aim of this systematic ... ...

    Abstract Background: Transthoracic echocardiography (TTE) plays a key role in the initial work-up of myocarditis where the identification of pathologic structural and functional changes may assist in its diagnosis and management. The aim of this systematic review was to appraise the evidence for the utility of echocardiographic parameters of cardiac structure and function in the diagnosis of myocarditis in adult populations.
    Methods: A systematic literature search of medical databases was performed using PRISMA principles to identify all relevant studies assessing TTE parameters in adult patients with myocarditis (1995-2020; English only; PROSPERO registration CRD42021243598). Data for a range of structural and functional TTE parameters were individually extracted and those with low heterogeneity were then meta-analyzed using a random-effects model for effect size, and assessed through standardized mean difference (SMD).
    Results: Available data from six studies (with a pooled total of 269 myocarditis patients and 240 controls) revealed that myocarditis can be reliably differentiated from healthy controls using echocardiographic measures of left ventricular (LV) size and systolic function, in particular LV end-diastolic diameter, LV ejection fraction (LVEF) and LV global longitudinal strain (LV-GLS) (p ≤ .01 for all). LV-GLS demonstrated the highest overall effect size, followed by LVEF and LVEDD (SMD: |0.46-1.98|). Two studies also demonstrated that impairment in LV-GLS was associated with adverse cardiovascular outcomes in this population, irrespective of LVEF.
    Conclusions: LV-GLS demonstrated the greatest overall effect size and therefore ability to differentiate myocarditis populations from healthy controls. GLS was also shown to be a predictor of adverse cardiovascular outcomes, in this population.
    Hightlights: What is already known on this subject? Myocarditis is a disease process that is often a diagnosis of exclusion, as it frequently mimics other acute cardiac pathologies. Transthoracic echocardiography is traditionally the initial imaging modality used for noninvasive structural assessment in populations with myocarditis. What might this study add? This study demonstrates that left ventricular (LV) global longitudinal strain, LV ejection fraction and LV end-diastolic diameter can differentiate between myocarditis patients and healthy controls. LV-GLS demonstrated the greatest overall effect size when comparing these two populations, in comparison to the other measures. How might this impact on clinical practice? This study demonstrates that assessment of myocardial deformation indices allows for sensitive discrimination between myocarditis patients from healthy controls. Routine assessment of LV-GLS may serve as an important diagnostic tool in the acute care setting.
    MeSH term(s) Adult ; Humans ; Myocarditis/complications ; Myocarditis/diagnostic imaging ; Echocardiography/methods ; Ventricular Function, Left ; Stroke Volume ; Heart Ventricles/diagnostic imaging ; Ventricular Dysfunction, Left
    Language English
    Publishing date 2024-02-12
    Publishing country United States
    Document type Meta-Analysis ; Systematic Review ; Journal Article ; Review
    ZDB-ID 843645-9
    ISSN 1540-8175 ; 0742-2822
    ISSN (online) 1540-8175
    ISSN 0742-2822
    DOI 10.1111/echo.15760
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Use of contemporary live tele-video conferencing for continuing surgical training at the time of COVID-19 pandemic.

    Tan, Henry C L / Tan, Jih H / Sagap, Ismail

    ANZ journal of surgery

    2020  Volume 90, Issue 7-8, Page(s) 1526

    MeSH term(s) COVID-19 ; Education, Distance/methods ; Education, Medical, Continuing/methods ; General Surgery/education ; Malaysia ; Videoconferencing
    Keywords covid19
    Language English
    Publishing date 2020-07-05
    Publishing country Australia
    Document type Letter
    ZDB-ID 2050749-5
    ISSN 1445-2197 ; 1445-1433 ; 0004-8682
    ISSN (online) 1445-2197
    ISSN 1445-1433 ; 0004-8682
    DOI 10.1111/ans.16105
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: The impact of body mass index on cardiac structure and function in a cohort of obese patients without traditional cardiovascular risk factors.

    Chen, Henry H L / Bhat, Aditya / Gan, Gary C H / Khanna, Shaun / Ahlenstiel, Golo / Negishi, Kazuaki / Tan, Timothy C

    International journal of cardiology. Cardiovascular risk and prevention

    2023  Volume 19, Page(s) 200211

    Abstract: Background: Obesity has been linked with alterations in hemodynamic, autonomic, and hormonal pathways in the body, leading to a spectrum of cardiovascular changes. We sought to evaluate the effects of obesity on structural and functional changes of the ... ...

    Abstract Background: Obesity has been linked with alterations in hemodynamic, autonomic, and hormonal pathways in the body, leading to a spectrum of cardiovascular changes. We sought to evaluate the effects of obesity on structural and functional changes of the heart in the absence of cardiac disease and associated risk factors.
    Methods: We identified healthy outpatients without any cardiovascular disease or risk factors from our institution's echocardiography database (2017-2020). Patients were stratified by body mass index (BMI; normal: 18.5-25 kg/m
    Results: 307 patients were assessed (41.5 ± 13.3yrs; 36.5%male; LVEF 61.3 ± 4.8%). No significant differences in indexed chamber volumes or LVEF were appreciated across BMI groups (p > 0.05 for all). LV-GLS, LASr, and RV-FWS were all significant on one-way ANOVA for differences from the group mean (all p < 0.01). Jonckheere-Terpstra test confirmed a significant trend of lower absolute LV-GLS, LASr and RV-FWS values across the rising BMI groups. On ROC curve analysis, a BMI value of 29.9 kg/m
    Conclusion: Obesity is linked with subclinical reduction of cardiac function in otherwise healthy subjects without cardiovascular risk factors, with reduction of left atrial function occurring at lower BMI, followed by the right and left ventricular function.
    Language English
    Publishing date 2023-09-09
    Publishing country Netherlands
    Document type Journal Article
    ISSN 2772-4875
    ISSN (online) 2772-4875
    DOI 10.1016/j.ijcrp.2023.200211
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Barriers to Guideline-Directed Anticoagulation in Patients With Atrial Fibrillation: New Approaches to an Old Problem.

    Bhat, Aditya / Karthikeyan, Sowmiya / Chen, Henry H L / Gan, Gary C H / Denniss, A Robert / Tan, Timothy C

    The Canadian journal of cardiology

    2023  Volume 39, Issue 5, Page(s) 625–636

    Abstract: Optimising guideline-directed anticoagulation in atrial fibrillation remains a perennial problem despite strong evidence for improved health outcomes with guideline-directed use of anticoagulation. Efforts to improve uptake have been hampered by barriers ...

    Abstract Optimising guideline-directed anticoagulation in atrial fibrillation remains a perennial problem despite strong evidence for improved health outcomes with guideline-directed use of anticoagulation. Efforts to improve uptake have been hampered by barriers found at the level of the physician, patient, disease, and choice of therapy. Clinician judgement is often clouded by factors such as therapeutic inertia, aversion to bleeding risk, and implicit bias. For patients, negative preconceptions of therapy, impact of therapy on day-to-day life, and the nocebo effect pose significant barriers. Both groups are affected by poor education. Utility of a single-pronged approach directed toward clinicians or patients have demonstrated variable success, with the highest impact appreciated in studies using shared-decision models. Further, there is emerging evidence for use of integrated models of care, which have shown efficacy in improving patient outcomes, as well as use of digital platforms such as mobile app-based interventions, which can be of aid to the clinician in improving patient adherence to anticoagulation, with translated improved outcomes in clinical trials. This narrative review aims to investigate the physician and health system, patient, and drug therapy and disease barriers to uptake of guideline-directed anticoagulation in the treatment of nonvalvular atrial fibrillation.
    MeSH term(s) Humans ; Atrial Fibrillation/complications ; Atrial Fibrillation/drug therapy ; Atrial Fibrillation/chemically induced ; Anticoagulants/therapeutic use ; Risk Factors ; Stroke/etiology ; Stroke/prevention & control
    Chemical Substances Anticoagulants
    Language English
    Publishing date 2023-01-27
    Publishing country England
    Document type Journal Article ; Review
    ZDB-ID 632813-1
    ISSN 1916-7075 ; 0828-282X
    ISSN (online) 1916-7075
    ISSN 0828-282X
    DOI 10.1016/j.cjca.2023.01.020
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Characterization of Subclinical Cardiac Dysfunction by Speckle Tracking Echocardiography in Patients With Non-severe Acute-Phase Myocarditis.

    Khanna, Shaun / Bhat, Aditya / Chen, Henry H L / Gu, Kennith H / Amarasekera, Anjalee / Gan, Gary C H / Nunes, Maria Carmo P / Tan, Timothy C

    The American journal of cardiology

    2023  Volume 207, Page(s) 285–291

    Abstract: Subclinical changes in left ventricular (LV) function have been demonstrated in patients with acute-phase myocarditis (AM) despite normal LV ejection fraction. The impact of AM on right ventricular (RV) and left atrial (LA) function has not been well ... ...

    Abstract Subclinical changes in left ventricular (LV) function have been demonstrated in patients with acute-phase myocarditis (AM) despite normal LV ejection fraction. The impact of AM on right ventricular (RV) and left atrial (LA) function has not been well described. This study aimed to assess for subclinical chamber dysfunction by speckle tracking echocardiography and its clinical relevance in this population. Patients with a diagnosis of AM (as per the European Society of Cardiology Working Group on Myocardial and Pericardial Diseases) admitted to our institution from 2013 to 2018 were assessed. Patients with elevated serum troponin, normal coronary assessment, and normal LV ejection fraction on transthoracic echocardiogram were included. Clinical and echocardiographic parameters were compared with healthy age-, gender- and risk-factor matched controls. Global longitudinal strain assessed through speckle tracking echocardiography was performed using vendor independent software (v4.6; TomTec Arena, Munich, Germany). The final cohort consisted of 80 patients (40 AM patients and 40 controls). No significant differences in baseline clinical characteristics were observed between groups. Of the echocardiographic parameters, AM patients had lower LV-global longitudinal strain (p <0.01), lower RV free-wall strain (p = 0.02) and lower peak LA strain (p <0.01). There were no differences in traditional echocardiographic measures of LV, RV, and LA function appreciated between groups. The presence of multichamber involvement was associated with peak Troponin levels (p <0.01). In conclusion, our study demonstrates the presence of global subclinical myocardial dysfunction in patients with AM. Additionally, the presence of multichamber involvement was significantly associated with degree of myocardial necrosis.
    MeSH term(s) Humans ; Myocarditis/diagnosis ; Myocarditis/diagnostic imaging ; Ventricular Dysfunction, Left/diagnostic imaging ; Ventricular Dysfunction, Left/complications ; Echocardiography ; Ventricular Function, Left ; Troponin
    Chemical Substances Troponin
    Language English
    Publishing date 2023-09-26
    Publishing country United States
    Document type Journal Article
    ZDB-ID 80014-4
    ISSN 1879-1913 ; 0002-9149
    ISSN (online) 1879-1913
    ISSN 0002-9149
    DOI 10.1016/j.amjcard.2023.08.142
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Use of contemporary live tele‐video conferencing for continuing surgical training at the time of COVID ‐19 pandemic

    Tan, Henry C. L. / Tan, Jih H. / Sagap, Ismail

    ANZ Journal of Surgery

    2020  Volume 90, Issue 7-8, Page(s) 1526–1526

    Keywords Surgery ; General Medicine ; covid19
    Language English
    Publisher Wiley
    Publishing country us
    Document type Article ; Online
    ZDB-ID 390816-1
    ISSN 0004-8682 ; 1445-1433
    ISSN 0004-8682 ; 1445-1433
    DOI 10.1111/ans.16105
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  7. Article ; Online: The utility of cardiac magnetic resonance imaging in the diagnosis of adult patients with acute myocarditis: a systematic review and meta-analysis.

    Khanna, Shaun / Amarasekera, Anjalee T / Li, Cindy / Bhat, Aditya / Chen, Henry H L / Gan, Gary C H / Ugander, Martin / Tan, Timothy C

    International journal of cardiology

    2022  Volume 363, Page(s) 225–239

    Abstract: Background: The presence of myocardial late gadolinium enhancement (LGE) indicates myocyte necrosis, and assists with the diagnosis of acute myocarditis (AM). Cardiac magnetic resonance (CMR) measures other than LGE i.e. tissue characterization and ... ...

    Abstract Background: The presence of myocardial late gadolinium enhancement (LGE) indicates myocyte necrosis, and assists with the diagnosis of acute myocarditis (AM). Cardiac magnetic resonance (CMR) measures other than LGE i.e. tissue characterization and myocardial structural and functional parameters, play an important diagnostic role in assessment for inflammation, as seen in AM. The aim of this systematic review was to appraise the evidence for the use of quantitative CMR measures to identify myocardial inflammation in order to diagnose AM in adult patients.
    Methods: A systematic literature search of medical databases was performed using PRISMA principles to identify relevant CMR studies on AM in adults (2005-2020; English; PROSPERO registration CRD42020180605). Data for a range of quantitative CMR measures were extracted. Continuous variables with low heterogeneity were meta-analyzed using a random-effects model for overall effect size measured as the standard mean difference (SMD).
    Results: Available data from 25 studies reporting continuous quantitative 1.5-T CMR measures revealed that AM is most reliably differentiated from healthy controls using T1 mapping (SMD 1.80, p<0.01) and T2 mapping (SMD 1.63, p<0.01), respectively. All other measures examined including T2-weighted ratio, extracellular volume, early gadolinium enhancement ratio, right ventricular ejection fraction, and LV end-diastolic volume, mass, ejection fraction, longitudinal strain, circumferential strain, and radial strain also had discriminatory ability although with smaller standard mean difference values (|SMD| 0.32-0.96, p < 0.01 for all).
    Conclusions: Meta-analysis shows that myocardial tissue characterization (T1 mapping>T2 mapping) followed by measures of left ventricular structure and function demonstrate diagnostic discriminatory ability in AM.
    MeSH term(s) Acute Disease ; Adult ; Contrast Media ; Gadolinium ; Humans ; Inflammation/pathology ; Magnetic Resonance Imaging/methods ; Magnetic Resonance Imaging, Cine ; Myocarditis/diagnosis ; Myocardium/pathology ; Predictive Value of Tests ; Stroke Volume ; Ventricular Function, Left ; Ventricular Function, Right
    Chemical Substances Contrast Media ; Gadolinium (AU0V1LM3JT)
    Language English
    Publishing date 2022-06-18
    Publishing country Netherlands
    Document type Journal Article ; Meta-Analysis ; Review ; Systematic Review
    ZDB-ID 779519-1
    ISSN 1874-1754 ; 0167-5273
    ISSN (online) 1874-1754
    ISSN 0167-5273
    DOI 10.1016/j.ijcard.2022.06.047
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: CRISPR-Cas-amplified urinary biomarkers for multiplexed and portable cancer diagnostics.

    Hao, Liangliang / Zhao, Renee T / Welch, Nicole L / Tan, Edward Kah Wei / Zhong, Qian / Harzallah, Nour Saida / Ngambenjawong, Chayanon / Ko, Henry / Fleming, Heather E / Sabeti, Pardis C / Bhatia, Sangeeta N

    Nature nanotechnology

    2023  Volume 18, Issue 7, Page(s) 798–807

    Abstract: Synthetic biomarkers, bioengineered sensors that generate molecular reporters in diseased microenvironments, represent an emerging paradigm in precision diagnostics. Despite the utility of DNA barcodes as a multiplexing tool, their susceptibility to ... ...

    Abstract Synthetic biomarkers, bioengineered sensors that generate molecular reporters in diseased microenvironments, represent an emerging paradigm in precision diagnostics. Despite the utility of DNA barcodes as a multiplexing tool, their susceptibility to nucleases in vivo has limited their utility. Here we exploit chemically stabilized nucleic acids to multiplex synthetic biomarkers and produce diagnostic signals in biofluids that can be 'read out' via CRISPR nucleases. The strategy relies on microenvironmental endopeptidase to trigger the release of nucleic acid barcodes and polymerase-amplification-free, CRISPR-Cas-mediated barcode detection in unprocessed urine. Our data suggest that DNA-encoded nanosensors can non-invasively detect and differentiate disease states in transplanted and autochthonous murine cancer models. We also demonstrate that CRISPR-Cas amplification can be harnessed to convert the readout to a point-of-care paper diagnostic tool. Finally, we employ a microfluidic platform for densely multiplexed, CRISPR-mediated DNA barcode readout that can potentially evaluate complex human diseases rapidly and guide therapeutic decisions.
    MeSH term(s) Humans ; Animals ; Mice ; CRISPR-Cas Systems/genetics ; Neoplasms/diagnosis ; Neoplasms/genetics ; DNA ; Nucleic Acids ; Biomarkers ; Tumor Microenvironment
    Chemical Substances DNA (9007-49-2) ; Nucleic Acids ; Biomarkers
    Language English
    Publishing date 2023-04-24
    Publishing country England
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 2254964-X
    ISSN 1748-3395 ; 1748-3387
    ISSN (online) 1748-3395
    ISSN 1748-3387
    DOI 10.1038/s41565-023-01372-9
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Prognostic implications of traditional and non-traditional cardiovascular risk factor profiles in patients with non-valvular atrial fibrillation.

    Bhat, Aditya / Gan, Gary C H / Chen, Henry H L / Nawaz, Sumreen / Khanna, Shaun / Dobbins, Timothy / Tan, Timothy C

    European journal of clinical investigation

    2022  Volume 52, Issue 9, Page(s) e13799

    Abstract: Background: Atrial fibrillation (AF) is a prevalent disease with associated mortality risk, mediated in large part through its associated cardiovascular risk factors. Standard modifiable cardiovascular risk factors (SMuRFs; hypercholesterolaemia, ... ...

    Abstract Background: Atrial fibrillation (AF) is a prevalent disease with associated mortality risk, mediated in large part through its associated cardiovascular risk factors. Standard modifiable cardiovascular risk factors (SMuRFs; hypercholesterolaemia, hypertension, diabetes and smoking) are established drivers of cardiovascular disease; however, the importance of non-traditional mediators of cardiovascular risk (NTRFs) such as chronic renal impairment, obstructive sleep apnoea and obesity is emerging. The differential impact of these risk factors on outcomes in patients with AF is not well studied.
    Methods: Consecutive patients admitted to our service between January 2013 and January 2018 with a primary diagnosis of non-valvular AF were assessed. Assessment of demographic, anthropometric, risk factor profile and pharmacotherapeutics was performed. The clinical course of these patients was followed for up to five years for the composite outcome of all-cause death and major adverse cardiovascular events.
    Results: Of the 1010 patients (62.29 ± 16.81 years, 51% men) included, 154 (15%) had no risk factors, 478 (47%) had only SMuRFs, 59 (6%) had only NTRFs and 319 (32%) had both SMuRFs and NTRFs. Over a mean follow-up period of 33.18 ± 21.27 months, a total of 288 patients met the composite outcome. On Cox regression, the coexistence of SMuRFs and NTRFs was an independent predictor of the composite outcome (HR 1.40; 95%CI 1.09-1.82, p = .01). Other independent predictors included age, heart failure, CHA
    Conclusions: The presence of both SMuRFs and NTRFs has prognostic implications in patients with non-valvular AF.
    MeSH term(s) Atrial Fibrillation/complications ; Atrial Fibrillation/diagnosis ; Atrial Fibrillation/epidemiology ; Cardiovascular Diseases/epidemiology ; Female ; Heart Disease Risk Factors ; Humans ; Male ; Prognosis ; Risk Assessment ; Risk Factors ; Stroke/etiology
    Language English
    Publishing date 2022-05-04
    Publishing country England
    Document type Journal Article
    ZDB-ID 186196-7
    ISSN 1365-2362 ; 0014-2972 ; 0960-135X
    ISSN (online) 1365-2362
    ISSN 0014-2972 ; 0960-135X
    DOI 10.1111/eci.13799
    Database MEDical Literature Analysis and Retrieval System OnLINE

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