Current permanent right ventricular and right atrial endocardial pacing leads are implanted utilizing a central lumen stylet. Right ventricular apex pacing initiates an abnormal asynchronous electrical activation pattern, which results in asynchronous ventricular contraction and relaxation. When pacing from right atrial appendage, the conduction time between two atria will be prolonged, which results in heterogeneity for both depolarization and repolarization. Six patients with Class I indication for permanent pacing were implanted with either single chamber or dual chamber pacemaker. The SelectSecure 3830 4-French (Fr) lumenless lead and the SelectSite C304 8.5-Fr steerable catheter-sheath (Medtronic Inc., USA) were used. Pre-selected pacing sites included inter-atrial septum and right ventricular outflow tract, which were defined by ECG and fluoroscopic criteria. All the implanting procedures were successful without complication. Testing results (mean atrial pacing threshold: 0.87 V; mean P wave amplitude: 2.28 mV; mean ventricular pacing threshold: 0.53V; mean R wave amplitude: 8.75 mV) were satisfactory. It is concluded that implantation of a 4-Fr lumenless pacing lead by using a streerable catheter-sheath to achieve inter-atrial septum or right ventricular outflow tract pacing is safe and feasible.
Cardiac Pacing, Artificial/*methods ; Electrodes, Implanted ; Equipment Safety ; Pacemaker, Artificial ; Prosthesis Implantation/methods ; Sick Sinus Syndrome/*therapy

In the last decade, Malaysia has experienced several hand, foot and mouth disease (HFMD) epidemics, complicated by fatalities due to severe neurological involvement. Enterovirus 71 (EV-71) has been implicated as the major causative agent for these epidemics. EV-71 infection is a global public health problem with pandemic potential. In many parts of Asia-Pacifi c, the virus has emerged as one of the most deadly virus infections amongst young children. The virus is highly transmissible through faecaloral route and respiratory droplets. A recent rise in neurological complications and deaths suggests that the viruses currently circulating may be more virulent. The major risk factor associated with more severe EV-71 infection is young age and poor cellular immunity. Rapid laboratory diagnosis and molecular surveillance is important to closely monitor the emergence of new EV-71 subgenotypes. Since vaccine and anti-virals for EV-71 are not available, control and prevention strategies remain the only ways to combat the infection.

Burnout and psychological distress were reported at higher rates among hospital healthcare workers. Despite this, there is a paucity of research examining the associated risk factors among workers across specialties and occupations in Asia. This paper aimed to examine the risk factors associated with burnout and psychological distress among Malaysian hospital healthcare workers from diverse medical specialties and occupations. A total of 368 doctors, nurses, assistant medical officers and hospital attendants were recruited from major medical and surgery departments in an urban general hospital. The participants were self-administered a questionnaire consisting of demographic information, Maslach Burnout Inventory-Human Services Survey and Depression Anxiety and Stress Scale. In the fully adjusted multivariate analyses, doctors were about four to five times more likely to be emotionally exhausted (aOR [adjusted Odds Ratio], 4.826; 95% CI [Confidence Interval]: 1.492-15.604, p<0.01), depressed (aOR, 5.221; 95% CI: 1.995-13.661, p<0.01) and stressed (aOR, 3.990; 95% CI: 1.473-10.809, p<0.01). Paediatric workers demonstrated three to five times higher risks of depression (aOR, 3.105, 95% CI: 1.043-9.243, p<0.05), anxiety (aOR, 3.517, 95% CI: 1.194- 10.356, p<0.05) and stress (aOR, 5.404, 95% CI: .1.628-17.942, p<0.01). Emotional exhaustion (aOR, 1.046, 95% CI: .1.013-1.079, p<0.01) and depersonalization (aOR, 1.078, 95% CI: .1.015-1.145, p<0.05) led to higher risks of psychological distress, while stress predicted higher risks of burnout (aOR, 1.153, 95% CI: 1.062-1.251, p<0.01). There were occupational and departmental differences in susceptibility to burnout and psychological distress, requiring further investigation into the unique working environments and roles of hospital healthcare workers.
Burnout ; psychological distress ; healthcare worker ; healthcare personnel ; hospital ; Malaysia

INTRODUCTION: Melanomas in Asians have different clinicopathological characteristics and prognosis from melanomas in Caucasians. This study reviewed the epidemiology and treatment outcomes of cutaneous melanoma diagnosed at a tertiary referral dermatology centre in Singapore, which has a multiracial population. The study also determined whether Asians had comparable relapse-free and overall survival periods to Caucasians in Singapore. METHOD: This is a retrospective review of cutaneous melanoma cases in our centre between 1996 and 2015. RESULTS: Sixty-two cases of melanoma were diagnosed in 61 patients: 72.6% occurred in Chinese, 19.4% in Caucasians and 3.2% in Indians, with an over-representation of Caucasians. Superficial spreading melanoma, acral lentiginous melanoma and nodular melanoma comprised 37.1%, 35.5% and 22.6% of the cases, respectively. The median time interval to diagnosis was longer in Asians than Caucasians; median Breslow's thickness in Asians were significantly thicker than in Caucasians (2.6mm versus 0.9mm, CONCLUSION More physician and patient education on skin cancer awareness is needed in our Asian-predominant population for better outcomes.
Humans ; Melanoma/therapy* ; Prognosis ; Retrospective Studies ; Singapore/epidemiology* ; Skin Neoplasms/therapy* ; Treatment Outcome

Aged ; Cardiac Care Facilities ; trends ; Cardiac Resynchronization Therapy ; trends ; utilization ; Cardiac Resynchronization Therapy Devices ; trends ; utilization ; Death, Sudden, Cardiac ; prevention & control ; Defibrillators, Implantable ; trends ; utilization ; Electric Countershock ; trends ; utilization ; Female ; Heart Failure ; therapy ; Humans ; Male ; Middle Aged ; Retrospective Studies ; Singapore ; Stroke Volume ; Tachycardia, Ventricular ; therapy ; Tertiary Care Centers

INTRODUCTIONOut-of-hospital cardiopulmonary arrest (CPA) in children is rare but significant, with poor survival rates and high morbidity. Asystole is the most common dysrhythmia, and cardiopulmonary resuscitation (CPR) is of great importance in such cases. We aimed to survey the knowledge, attitudes and perceptions of parents in Singapore regarding infant basic life support (IBLS).

METHODSA questionnaire survey was administered to parents of children managed at the Neonatal Department of Singapore General Hospital, Singapore, between 1 September and 31 December 2008. The questionnaire consisted of three sections--section A collected demographic data, section B included questions on knowledge, and section C explored attitudes and perceptions. Knowledge T-scores were analysed for the entire cohort and subanalysed with respect to prior IBLS training.

RESULTSIn our study cohort (n = 375), the median Basic Knowledge (BK) T-score was 7 (range 1-9) and the pass rate was 55%. Median BK T-scores were significantly different between untrained (6; range 3-9) and previously trained (8; range 3-9) participants. A majority of the trained participants obtained pass marks. Median Total Knowledge T-score, involving advanced questions, for previously trained participants was 11 (range 3-14), but pass rate was low (35.7%). Higher educational qualification was a significant factor impacting all scores. Untrained participants indicated interest in attending IBLS courses, while trained participants were interested in refresher courses.

CONCLUSIONIBLS training, as part of basic cardiac life support training, is important given that CPR can significantly alter the outcome in children with CPA. Our survey revealed knowledge gaps that could be bridged through formal training. Refresher courses to regularly update parents' knowledge are recommended.

Adult ; Cardiopulmonary Resuscitation ; methods ; Cohort Studies ; Female ; Health Knowledge, Attitudes, Practice ; Health Literacy ; Heart Arrest ; therapy ; Humans ; Infant ; Male ; Middle Aged ; Parents ; Singapore ; Surveys and Questionnaires ; Treatment Outcome ; Young Adult

INTRODUCTIONLong QT syndrome (LQTS), an inherited cardiac arrhythmia, is a disorder of ventricular repolarisation characterised by electrocardiographic abnormalities and the onset of torsades de pointes leading to syncope and sudden death. Genetic polymorphisms in 5 well-characterised cardiac ion channel genes have been identified to be responsible for the disorder. The aim of this study is to identify disease-causing mutations in these candidate genes in a LQTS family.

MATERIALS AND METHODSThe present study systematically screens the coding region of the LQTS-associated genes (KCNQ1, HERG, KCNE1, KCNE2 and SCN5A) for mutations using DNA sequencing analysis.

RESULTSThe mutational analysis revealed 7 synonymous and 2 non-synonymous polymorphisms in the 5 ion channel genes screened.

CONCLUSIONWe did not identify any clear identifiable genetic marker causative of LQTS, suggesting the existence of LQTS-associated genes awaiting discovery.

Adolescent ; Adult ; Child ; DNA Mutational Analysis ; ERG1 Potassium Channel ; Ether-A-Go-Go Potassium Channels ; analysis ; genetics ; Female ; Frameshift Mutation ; Humans ; KCNQ1 Potassium Channel ; analysis ; genetics ; Long QT Syndrome ; genetics ; Male ; Middle Aged ; Muscle Proteins ; analysis ; genetics ; NAV1.5 Voltage-Gated Sodium Channel ; Polymorphism, Genetic ; genetics ; Potassium Channels, Voltage-Gated ; analysis ; genetics ; Sodium Channels ; analysis ; genetics ; Trans-Activators

Current permanent fight ventricular and fight atrial endocardial pacing leads are implanted utilizing a central lumen stylet. Right ventricular apex pacing initiates an abnormal asyno chronous electrical activation pattern, which results in asynchronous ventricular contraction and re-laxation. When pacing from right atrial appendage, the conduction time between two atria will be prolonged, which results in heterogeneity for both depolarization and repolarization. Six patients with Class Ⅰ indication for permanent pacing were implanted with either single chamber or dual chamber pacemaker. The SelectSecure 3830 4-French (Fr) lumenless lead and the SelectSite C304 8.5-Fr steerable catheter-sheath (Medtronic Inc., USA) were used. Pre-selected pacing sites included inter-atrial septum and right ventricular outflow tract, which were defined by ECG and fluoroscopic criteria. All the implanting procedures were successful without complication. Testing results (mean atrial pacing threshold: 0.87 V; mean P wave amplitude: 2.28 mV; mean ventricular pacing threshold:0.53V; mean R wave amplitude: 8.75 mV) were satisfactory. It is concluded that implantation of a 4-Fr lumenless pacing lead by using a streerable catheter-sheath to achieve inter-atrial septum or right ventricular outflow tract pacing is safe and feasible.

INTRODUCTIONThis study reviewed the epidemiological trends of poliomyelitis from 1946 to 2010, and the impact of the national immunisation programme in raising the population herd immunity against poliovirus. We also traced the efforts Singapore has made to achieve certification of poliomyelitis eradication by the World Health Organisation.

MATERIALS AND METHODSEpidemiological data on all reported cases of poliomyelitis were obtained from the Communicable Diseases Division of the Ministry of Health as well as historical records. Coverage of the childhood immunisation programme against poliomyelitis was based on the immunisation data maintained by the National Immunisation Registry, Health Promotion Board. To assess the herd immunity of the population against poliovirus, 6 serological surveys were conducted in 1962, 1978, 1982 to 1984, 1989, 1993 and from 2008 to 2010.

RESULTSSingapore was among the fi rst countries in the world to introduce live oral poliovirus vaccine (OPV) on a mass scale in 1958. With the comprehensive coverage of the national childhood immunisation programme, the incidence of paralytic poliomyelitis declined from 74 cases in 1963 to 5 cases from 1971 to 1973. The immunisation coverage for infants, preschool and primary school children has been maintained at 92% to 97% over the past decade. No indigenous poliomyelitis case had been reported since 1978 and all cases reported subsequently were imported.

CONCLUSIONSingapore was certified poliomyelitis free along with the rest of the Western Pacific Region in 2000 after fulfilling all criteria for poliomyelitis eradication, including the establishment of a robust acute flaccid paralysis surveillance system. However, post-certification challenges remain, with the risk of wild poliovirus importation. Furthermore, it is timely to consider the replacement of OPV with the inactivated poliovirus vaccine in Singapore's national immunisation programme given the risk of vaccine-associated paralytic poliomyelitis and circulating vaccine-derived polioviruses.

Adolescent ; Certification ; Child ; Child, Preschool ; Disease Eradication ; organization & administration ; Female ; Humans ; Infant ; Male ; Poliomyelitis ; epidemiology ; prevention & control ; virology ; Poliovirus ; immunology ; Singapore ; epidemiology