Ventricular fibrillation (VF) is the most serious variety of arrhythmia which requires quick and accurate detection to save lives. In this paper, we propose a new time domain algorithm, called threshold crossing sample count (TCSC), which is an improved version of the threshold crossing interval (TCI) algorithm for VF detection. The algorithm is based on an important feature of the VF signal which relies on the random behavior of the electrical heart vector. By two simple operations: comparison and count, the technique calculates an effective measure which is used to separate lifethreatening VF from other heart rhythms. For assessment of the performance of the algorithm, the method is applied on the complete MIT-BIH arrhythmia and CU databases, and a promising good performance is observed. Seven other classical and new VF detection algorithms, including TCI, have been simulated and comparative performance results in terms of different quality parameters are presented. The TCSC algorithm yields the highest value of the area under the receiver operating characteristic curve (AUC). The new algorithm shows strong potential to be applied in clinical applications for faster and accurate detection of VF.

BackgroundTo determine whether waist-to-height ratio correlates with coronary artery disease (CAD) severity better, than the body mass index (BMI) as assessed by coronary angiography in Bangladeshi population.MethodsThis cross sectional study was done on patients in Department of Cardiology in DMCH and those referred in the cath-lab of the Department of Cardiology for CAG during November 2009 to October 2010 involving 120 patients. They were divided into group-A (with coronary score ≥7) and group-B (coronary score <7) depending on Gensisni score.ResultThere were no statistically significant difference regarding the distribution of age, sex and clinical diagnosis and parameters between the two groups. The mean age of patients was 51.7 ± 8.2 years and 48.8 ± 9.1 years in Group A and Group B respectively with a male predominance in both the groups. Patients in group A had higher BMI ≥25 and waist to height ratio (≥0.55) than Group B which showed a statistically significant association (p < 0.001). Though a significant positive correlation (r = 0.296, p = 0.006) was observed between BMI and Coronary artery disease score in group A patients, scenario was reverse fro group B (r = 0.076, p = 0.659). The statement was also true for Waist-to-height ratio and Waist-to-height ratio with BMI. Multivariate analysis also yeilded that a patient with BMI ≥25 kg/m2 and waist-to height ratio of ≥0.55 are 3.06 times and 6.77 times, more likely to develop significant coronary artery disease respectively.ConclusionThe waist-to-height ratio showed better correlation with the severity of coronary artery disease than the BMI.

Acute coronary syndrome (ACS) remains the leading cause of death in the developed world and second leading cause of death in developing countries. Elevated troponin levels and extent of ST-segment depressions are clinically important because they may act as an effective prognostic marker .This cross-sectional study has been designed to see the correlation of ST-segment depression and level of troponin I with in-hospital outcome of NSTEMI patients. The study was conducted in the Department of Cardiology, Dhaka Medical College Hospital, Dhaka during the period of April, 2011- March, 2012. A total of 90 patients were selected by purposive sampling. In this study,the mean ±SD age of the patients was 55.9±9.1 years with a range of 36-80 years with a male -female ratio of 2:1.Over all dyslipidaemia was the most common risk factor present in 55(61.10%) patients followed by smoking in 48(53.3%) patients then obesity in 32(35.60%) then hypertension in 31(34.4%) patients. Troponin I level was significantly high in patients who developed acute LVF (10.36±7.4 vs 7.0124±6.8, p=.027), and cardiogenic shock (13.72±11.37 vs 8.64±7.35, p=.033). Troponin I was significantly high in patients who developed complication (10.72±8.84 vs 6.24±5.41, p=.005) than the patients who were discharged without complication. ST segment depression was significantly more in patients who developed acute LVF(1.07±1.63 vs.55±.74, p=.048). Logistic regression analysis of acute LVF with Troponin I and ST-segment depression showed that ST-segment depression and level of Troponin I were important correlates of acute LVF .Medicine Today 2015 Vol.27(2): 14-19

Aims: Coronary artery disease is a devastating disease precisely because an otherwise healthy person in the prime of life may die or become disabled without warning. The objectives were to study the clinical profile, risk factors prevalence, angiographic distribution and severity of coronary artery stenosis in acute coronary syndrome (ACS) patients admitted in Cardiology Department of Dhaka Medical College Hospital, Dhaka. Materials and Methods: A total of 800 patients of ACS were analyzed for various risk factors, angiographic patterns and severity of coronary artery disease at DMCH, Dhaka, Bangladesh. Results: Mean age of presentation was 51.27±8.80 years. Majority were male 628 (78.5%) and rest were females (21.5%). Most patients had ST elevated myocardial infarction (STEMI) 509 (63.6%) followed by non-STEMI (NSTEMI) 207 (25.9%) and Unstable Angina (UA) 84 (10.5%). Risk factors: smoking was present in 388 (48.5%), hypertension in 289 (36.13%), diabetes in 235 (29.38%), dyslipidaemia in 169 (21.13%) and obesity in 356 (44.5%) patients. Singlevessel disease was present in 30.32% patients, Doublevessel disease was present in 23.23% patients and Triple vessel disease was present in 27.15% patients. Conclusion: STEMI was the most common presentation. ACS occurred earlier in comparison to Western population. Smoking was most prevalent risk factor. Diabetic patients had more multivessel disease.

Abstract:Background: Heart failure is a complex clinical syndrome that arises secondary to abnormalities of cardiac structure and/or function (inherited or acquired)