Displaying publications 1 - 20 of 2081 in total

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  1. Cardosa MJ
    Curr. Opin. Infect. Dis., 2000 Oct;13(5):471-475.
    PMID: 11964816 DOI: 10.1097/00001432-200010000-00007
    The year under review has seen a remarkable proliferation of papers on dengue. Four prospective studies have been carried out across the dengue belt, many groups have been pushing at the question of pathogenesis of dengue haemorrhagic fever, and a breakthrough has been achieved in the development of a mouse model for human dengue haemorrhagic fever.
    Matched MeSH terms: Dengue/physiopathology*
  2. Pang T, Lam KS
    Immunol. Today, 1983 Feb;4(2):46-9.
    PMID: 25291069 DOI: 10.1016/0167-5699(83)90110-X
    Over the past 20 years, dengue haemorrhagic fever (DHF) has been the subject of intensive epidemiological, clinical, virological and immunological investigations. Considerable debate and controversy have surrounded its causation and the probable role of immunological mechanisms in its pathogenesis. The exact cause of DHF is still uncertain and this article reviews current thinking about the problem.
    Matched MeSH terms: Severe Dengue/physiopathology*
  3. Bhattamisra SK, Siang TC, Rong CY, Annan NC, Sean EHY, Xi LW, et al.
    Curr Diabetes Rev, 2019;15(5):382-394.
    PMID: 30648511 DOI: 10.2174/1573399815666190115145702
    BACKGROUND: The incidence of diabetes is increasing steeply; the number of diabetics has doubled over the past three decades. Surprisingly, the knowledge of type 3c diabetes mellitus (T3cDM) is still unclear to the researchers, scientist and medical practitioners, leading towards erroneous diagnosis, which is sometimes misdiagnosed as type 1 diabetes mellitus (T1DM), or more frequently type 2 diabetes mellitus (T2DM). This review is aimed to outline recent information on the etiology, pathophysiology, diagnostic procedures, and therapeutic management of T3cDM patients.

    METHODS: The literature related to T3cDM was thoroughly searched from the public domains and reviewed extensively to construct this article. Further, existing literature related to the other forms of diabetes is reviewed for projecting the differences among the different forms of diabetes. Detailed and updated information related to epidemiological evidence, risk factors, symptoms, diagnosis, pathogenesis and management is structured in this review.

    RESULTS: T3cDM is often misdiagnosed as T2DM due to the insufficient knowledge differentiating between T2DM and T3cDM. The pathogenesis of T3cDM is explained which is often linked to the history of chronic pancreatitis, pancreatic cancer. Inflammation, and fibrosis in pancreatic tissue lead to damage both endocrine and exocrine functions, thus leading to insulin/glucagon insufficiency and pancreatic enzyme deficiency.

    CONCLUSION: Future advancements should be accompanied by the establishment of a quick diagnostic tool through the understanding of potential biomarkers of the disease and newer treatments for better control of the diseased condition.

    Matched MeSH terms: Pancreas/physiopathology
  4. Kwan MK, Wong KA, Lee CK, Chan CY
    Eur Spine J, 2016 Feb;25(2):401-8.
    PMID: 25962815 DOI: 10.1007/s00586-015-4016-9
    PURPOSE: To introduce a new clinical neck tilt grading and to investigate clinically and radiologically whether neck tilt and shoulder imbalance is the same phenomenon in AIS patients.

    METHODS: 89 AIS Lenke 1 and 2 cases were assessed prospectively using the new clinical neck tilt grading. Shoulder imbalance and neck tilt were correlated with coracoid height difference (CHD), clavicle\rib intersection distance (CRID), clavicle angle (CA), radiographic shoulder height (RSH), T1 tilt and cervical axis.

    RESULTS: Mean age was 17.2 ± 3.8 years old. 66.3 % were Lenke type 1 and 33.7 % were type 2 curves. Strong intraobserver (0.79) and interobserver (0.75) agreement of the clinical neck tilt grading was noted. No significant correlation was observed between clinical neck tilt and shoulder imbalance (0.936). 56.3 % of grade 3 neck tilt, 50.0 % grade 2 neck tilt patients had grade 0 shoulder imbalance. In patients with grade 2 shoulder imbalance, 42.9 % had grade 0, 35.7 % grade 1, 14.3 % grade 2 and only 7.1 % had grade 3 neck tilt. CHD, CRID, CA and RSH correlated with shoulder imbalance. T1 tilt and cervical axis measurements correlated with neck tilt.

    CONCLUSIONS: In conclusion, neck tilt is distinct from shoulder imbalance. Clinical neck tilt has poor correlation with clinical shoulder imbalance. Clinical neck tilt grading correlated with cervical axis and T1 tilt whereas clinical shoulder grading correlated with CHD, RSH CRID and CA.

    Matched MeSH terms: Clavicle/physiopathology; Neck/physiopathology*; Ribs/physiopathology; Scoliosis/physiopathology*; Shoulder/physiopathology*
  5. Chan BT, Ong CW, Lim E, Abu Osman NA, Al Abed A, Lovell NH, et al.
    PMID: 23367367 DOI: 10.1109/EMBC.2012.6347432
    Dilated cardiomyopathy (DCM) is a common cardiac disease which leads to the deterioration in cardiac performance. A computational fluid dynamics (CFD) approach can be used to enhance our understanding of the disease, by providing us with a detailed map of the intraventricular flow and pressure distributions. In the present work, effect of ventricular size on the intraventricular flow dynamics and intraventricular pressure gradients (IVPGs) was studied using two different implementation methods, i.e. the geometry-prescribed and the fluid structure interaction (FSI) methods. Results showed that vortex strength and IVPGs are significantly reduced in a dilated heart, leading to an increased risk of thrombus formation and impaired ventricular filling. We suggest FSI method as the ultimate method in studying ventricular dysfunction as it provides additional cardiac disease prognostic factors and more realistic model implementation.
    Matched MeSH terms: Cardiomyopathy, Dilated/physiopathology*; Heart Ventricles/physiopathology*
  6. Yusoff K, Khalid BA
    Ann Acad Med Singap, 1993 Jul;22(4):609-12.
    PMID: 8257070
    Cardiac arrhythmias are common in patients with thyrotoxicosis. Conduction abnormalities have been seen in a few thyrotoxic patients, but these, in particular high grade atrioventricular (AV) block, often occur in the presence of other conditions. Three thyrotoxic patients with conduction abnormalities are described: two were associated with severe hypokalaemia and the third had congestive cardiac failure. Conditions predisposing to conduction abnormality should be identified when this occurs in a thyrotoxic patient as their correction may help resolve or explain the conduction abnormality.
    Matched MeSH terms: Atrial Flutter/physiopathology*; Atrioventricular Node/physiopathology; Bundle of His/physiopathology; Bundle-Branch Block/physiopathology*; Heart Block/physiopathology*; Heart Failure/physiopathology; Hypokalemia/physiopathology; Paralyses, Familial Periodic/physiopathology; Sinoatrial Node/physiopathology; Thyrotoxicosis/physiopathology*
  7. Abualsaud K, Mahmuddin M, Saleh M, Mohamed A
    ScientificWorldJournal, 2015;2015:945689.
    PMID: 25759863 DOI: 10.1155/2015/945689
    Brain status information is captured by physiological electroencephalogram (EEG) signals, which are extensively used to study different brain activities. This study investigates the use of a new ensemble classifier to detect an epileptic seizure from compressed and noisy EEG signals. This noise-aware signal combination (NSC) ensemble classifier combines four classification models based on their individual performance. The main objective of the proposed classifier is to enhance the classification accuracy in the presence of noisy and incomplete information while preserving a reasonable amount of complexity. The experimental results show the effectiveness of the NSC technique, which yields higher accuracies of 90% for noiseless data compared with 85%, 85.9%, and 89.5% in other experiments. The accuracy for the proposed method is 80% when SNR=1 dB, 84% when SNR=5 dB, and 88% when SNR=10 dB, while the compression ratio (CR) is 85.35% for all of the datasets mentioned.
    Matched MeSH terms: Epilepsy/physiopathology*
  8. Wan Ab Naim WN, Ganesan PB, Sun Z, Chee KH, Hashim SA, Lim E
    ScientificWorldJournal, 2014;2014:652520.
    PMID: 24672348 DOI: 10.1155/2014/652520
    Aortic dissection, characterized by separation of the layers of the aortic wall, poses a significant challenge for clinicians. While type A aortic dissection patients are normally managed using surgical treatment, optimal treatment strategy for type B aortic dissection remains controversial and requires further evaluation. Although aortic diameter measured by CT angiography has been clinically used as a guideline to predict dilation in aortic dissection, hemodynamic parameters (e.g., pressure and wall shear stress), geometrical factors, and composition of the aorta wall are known to substantially affect disease progression. Due to the limitations of cardiac imaging modalities, numerical simulations have been widely used for the prediction of disease progression and therapeutic outcomes, by providing detailed insights into the hemodynamics. This paper presents a comprehensive review of the existing numerical models developed to investigate reasons behind tear initiation and progression, as well as the effectiveness of various treatment strategies, particularly the stent graft treatment.
    Matched MeSH terms: Aortic Aneurysm/physiopathology*
  9. Ong C, Dokos S, Chan B, Lim E, Al Abed A, Bin Abu Osman NA, et al.
    PMID: 23680359 DOI: 10.1186/1742-4682-10-35
    Despite the rapid advancement of left ventricular assist devices (LVADs), adverse events leading to deaths have been frequently reported in patients implanted with LVADs, including bleeding, infection, thromboembolism, neurological dysfunction and hemolysis. Cannulation forms an important component with regards to thrombus formation in assisted patients by varying the intraventricular flow distribution in the left ventricle (LV). To investigate the correlation between LVAD cannula placement and potential for thrombus formation, detailed analysis of the intraventricular flow field was carried out in the present study using a two way fluid structure interaction (FSI), axisymmetric model of a passive LV incorporating an inflow cannula. Three different cannula placements were simulated, with device insertion near the LV apex, penetrating one-fourth and mid-way into the LV long axis. The risk of thrombus formation is assessed by analyzing the intraventricular vorticity distribution and its associated vortex intensity, amount of stagnation flow in the ventricle as well as the level of wall shear stress. Our results show that the one-fourth placement of the cannula into the LV achieves the best performance in reducing the risk of thrombus formation. Compared to cannula placement near the apex, higher vortex intensity is achieved at the one-fourth placement, thus increasing wash out of platelets at the ventricular wall. One-fourth LV penetration produced negligible stagnation flow region near the apical wall region, helping to reduce platelet deposition on the surface of the cannula and the ventricular wall.
    Matched MeSH terms: Thrombosis/physiopathology*
  10. Loh KY, Kew ST
    Med J Malaysia, 2008 Jun;63(2):174-6; quiz 177.
    PMID: 18942314 MyJurnal
    Non ulcer dyspepsia is one of the most common problems encountered in primary care practice. The underlying pathophysiology of non ulcer dyspepsia is not fully understood, but it is known that this condition is associated with H. pylori infection and motility disorder. The presenting abdominal symptoms are non specific: they include bloating, belching, flatulence, excessive fullness after eating and nausea. Psychological condition such as anxiety, depression and stress do play a role in the recurrence of symptoms. Upper GI endoscopy is necessary in patients who presents with alarm symptoms suggestive of possible underlying organic condition before one makes the diagnosis of non ulcer dyspepsia. Pharmacological therapy using H2 receptor antagonist and proton pump inhibitors are effective for symptom relief. Patient's education and supportive care should be part of the management strategy in recurrent chronic dyspepsia.
    Matched MeSH terms: Deglutition Disorders/physiopathology*
  11. Ong HT
    Med J Malaysia, 2002 Dec;57(4):510-4.
    PMID: 12733181
    Matched MeSH terms: Hypertension/physiopathology
  12. Awang MN
    Int Dent J, 1989 Dec;39(4):236-40.
    PMID: 2691403
    The aetiology of dry socket continues to be the subject of intense research. Local disturbances of fibrinolytic activity appear to be the most satisfactory explanation for the pathogenesis of this disorder. The factors that are responsible for local changes in fibrinolytic activity are reviewed and evaluated. In the management of this disorder attention should be directed towards the prevention of local changes in fibrinolytic activity.
    Matched MeSH terms: Dry Socket/physiopathology
  13. Norasyikin AW, Rozita M, Mohd Johan MJ, Suehazlyn Z
    Med Princ Pract, 2014;23(4):387-9.
    PMID: 24401542 DOI: 10.1159/000357645
    OBJECTIVE: To report an uncommon presentation of a rare case of autoimmune polyglandular syndrome type IIIb in an elderly woman.
    CLINICAL PRESENTATION AND INTERVENTION: A 62-year-old woman presented with anaemic symptoms and jaundice. Blood tests showed macrocytic anaemia due to vitamin B12 deficiency with Coombs negative haemolysis. A thyroid function test was consistent with hypothyroidism. Autoimmune antibody assays were positive for anti-parietal cell, anti-intrinsic factor and anti-thyroid peroxidase antibodies. A final diagnosis of autoimmune thyroiditis with pernicious anaemia, which constituted autoimmune polyglandular syndrome type IIIb, was made and the patient was treated with L-thyroxine, vitamin B12 injection and a blood transfusion. She was discharged uneventfully after a week of hospitalization.
    CONCLUSION: This case showed that the presence of one autoimmune endocrine disease should prompt clinicians to look for other coexisting autoimmune diseases which may be asymptomatic despite positive autoantibodies.
    Matched MeSH terms: Anemia, Macrocytic/physiopathology; Hypothyroidism/physiopathology; Jaundice/physiopathology; Thrombocytopenia/physiopathology; Vitamin B 12 Deficiency/physiopathology; Polyendocrinopathies, Autoimmune/physiopathology*
  14. Tan CT
    J Neurol Neurosurg Psychiatry, 1988 Jul;51(7):944-6.
    PMID: 3204403
    Thirty four patients with cryptococcal meningitis seen in the University of Malaya medical centre since 1980 were reviewed. Eleven patients had bilateral papilloedema and visual impairment but eventually survived. Seven patients had intensive aggressive measures, including shunting to reduce intracranial hypertension irrespective of ventricular size shown in CT scan, and showed substantial improvement in vision. It is concluded that papilloedema and visual failure in cryptococcal meningitis reflects raised intracranial pressure and that this should be treated vigorously.
    Matched MeSH terms: Cryptococcosis/physiopathology*; Meningitis/physiopathology*; Optic Nerve/physiopathology; Papilledema/physiopathology*; Pseudotumor Cerebri/physiopathology*; Vision Disorders/physiopathology*
  15. Valayatham V, Kakarla A, Rymer J
    J Obstet Gynaecol, 2007 Oct;27(7):736-7.
    PMID: 17999311
    Matched MeSH terms: Hydronephrosis/physiopathology; Kidney/physiopathology*
  16. Ibrahim F, Taib MN, Abas WA, Guan CC, Sulaiman S
    Comput Methods Programs Biomed, 2005 Sep;79(3):273-81.
    PMID: 15925426
    Dengue fever (DF) is an acute febrile viral disease frequently presented with headache, bone or joint and muscular pains, and rash. A significant percentage of DF patients develop a more severe form of disease, known as dengue haemorrhagic fever (DHF). DHF is the complication of DF. The main pathophysiology of DHF is the development of plasma leakage from the capillary, resulting in haemoconcentration, ascites, and pleural effusion that may lead to shock following defervescence of fever. Therefore, accurate prediction of the day of defervescence of fever is critical for clinician to decide on patient management strategy. To date, no known literature describes of any attempt to predict the day of defervescence of fever in DF patients. This paper describes a non-invasive prediction system for predicting the day of defervescence of fever in dengue patients using artificial neural network. The developed system bases its prediction solely on the clinical symptoms and signs and uses the multilayer feed-forward neural networks (MFNN). The results show that the proposed system is able to predict the day of defervescence in dengue patients with 90% prediction accuracy.
    Matched MeSH terms: Dengue/physiopathology*; Severe Dengue/physiopathology*
  17. Flaherty G, O'Connor R, Johnston N
    Travel Med Infect Dis, 2016 May-Jun;14(3):200-11.
    PMID: 27040934 DOI: 10.1016/j.tmaid.2016.03.015
    High altitude training is regarded as an integral component of modern athletic preparation, especially for endurance sports such as middle and long distance running. It has rapidly achieved popularity among elite endurance athletes and their coaches. Increased hypoxic stress at altitude facilitates key physiological adaptations within the athlete, which in turn may lead to improvements in sea-level athletic performance. Despite much research in this area to date, the exact mechanisms which underlie such improvements remain to be fully elucidated. This review describes the current understanding of physiological adaptation to high altitude training and its implications for athletic performance. It also discusses the rationale and main effects of different training models currently employed to maximise performance. Athletes who travel to altitude for training purposes are at risk of suffering the detrimental effects of altitude. Altitude illness, weight loss, immune suppression and sleep disturbance may serve to limit athletic performance. This review provides an overview of potential problems which an athlete may experience at altitude, and offers specific training recommendations so that these detrimental effects are minimised.
    Matched MeSH terms: Altitude Sickness/physiopathology; Anoxia/physiopathology
  18. Teoh SK
    Med J Malaysia, 1976 Sep;31(1):59-64.
    PMID: 1023015
    Matched MeSH terms: Androgen-Insensitivity Syndrome/physiopathology; Testis/physiopathology*
  19. Tan SH, Balachandran R, Prepageran N
    Eur J Intern Med, 2019 02;60:e3-e4.
    PMID: 29759815 DOI: 10.1016/j.ejim.2018.05.012
    Matched MeSH terms: Deglutition Disorders/physiopathology*; Zenker Diverticulum/physiopathology*
  20. Nor Hanipah Z, Punchai S, Augustin T, Brethauer SA, Schauer PR, Aminian A
    Obes Surg, 2018 11;28(11):3580-3585.
    PMID: 30043143 DOI: 10.1007/s11695-018-3398-2
    BACKGROUND: Bariatric surgery can improve renal dysfunction associated with obesity and diabetes. However, acute kidney injury (AKI) can complicate the early postoperative course after bariatric surgery. The long-term consequences of early postoperative AKI on renal function are unknown.

    METHODS: Patient undergoing bariatric surgery from 2008 to 2015 who developed AKI within 60 days after surgery were studied. Patients on dialysis before surgery were excluded.

    RESULTS: Out of 4722 patients, 42 patients (0.9%) developed early postoperative AKI after bariatric surgery of whom five had chronic kidney disease (CKD) preoperatively including CKD stage 3 (n = 2), stage 4 (n = 2), and stage 5 (n = 1). Etiologies of AKI included prerenal in 37 and renal in 5 patients. Nine patients (21%) underwent hemodialysis in early postoperative period for AKI. The median duration of follow-up was 28 months (interquartile range, 4-59). Of the 40 patients eligible for follow-up, 36 patients (90%) returned to their baseline renal function. However, four patients (10%) had worsening of renal function at follow-up.

    CONCLUSIONS: The incidence of early postoperative AKI after bariatric surgery is about 1%. The most common causes of AKI after bariatric surgery are dehydration and infectious complications. In our series, 10% of patients who developed AKI in early postoperative period had worsening of renal function in long-term follow-up. In the absence of severe sepsis and severe underlying kidney dysfunction (CKD stages 4 and 5), full recovery is expected after postoperative AKI.

    Matched MeSH terms: Kidney/physiopathology; Renal Insufficiency, Chronic/physiopathology
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