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Ecg present parameter

Elke Parsi, Norman Bitterlich, Anne Winkelmann, Daniela Rösler, Christine Metzner
BACKGROUND: Cardiac arrhythmias (CA) are very common and may occur with or without heart disease. Causes of these disturbances can be components of the metabolic syndrome (MetS) or deficits of micronutrients especially magnesium, potassium, B vitamins and coenzyme Q10. Both causes may also influence each other. Insulin resistance (IR) is a risk factor for diastolic dysfunction. One exploratory outcome of the present pilot study was to assess the impact of a dietary intervention with specific micronutrients on the lowering of IR levels in patients with CA with the goal to improve the left ventricular (LV) function...
December 3, 2018: BMC Cardiovascular Disorders
Chandraiah Godugu, Preeti Kumari, Amit Khurana
AIM: The present study was designed to probe the cardioprotective effects of nanoyttria (NY). MATERIALS & METHODS: NY was characterized using various techniques. Isoproterenol (ISO)-induced cardiotoxicity challenged mice were treated with NY for 28 days at two doses (0.4 and 4 mg/kg, intraperitoneally). RESULTS: NY demonstrated free radical scavenging activity as shown by a 2,2-diphenyl-1-picrylhydrazyl assay. NY treatment showed alleviation of ISO-induced cardiotoxicity as evident from the reduction in biochemical parameters...
December 3, 2018: Nanomedicine
Rika Miyagi, Yuh Sasawaki, Hideuki Shiotani
The notion that sedentary behavior is harmful to human health is widespread. Little is known about the short term influence of sedentary behavior on heart rate (HR) and heart rate variability (HRV) circadian rhythms. Therefore the purpose of the present study was to examine the influence of short term sedentary behavior on the circadian rhythms of HR and HRV using cosine periodic regression analysis. Sixteen healthy young students were included in a randomized crossover study. All subjects underwent 24-h ECG Holter monitoring in two different states of physical activity, an active condition (more than 15,000 steps per day) and a sedentary condition (less than 1,000 steps per day)...
December 3, 2018: Chronobiology International
Ljuba Bacharova, Nikolaos Nikolopoulos, Ioannis Zamanis, Zora Krivosíkova, Kornelia Stefíkova, Martin Gajdos
Both obesity and menopause are significant cardiovascular risk factors. In postmenopausal women the protective effect of estrogens is reduced and menopause is frequently associated with occurrence of other significant cardiovascular factors including obesity. This study was focused on evaluating the effect of obesity on the QRS complex in pre- and postmenopausal women. We present results of analysis of 199 electrocardiograms of pre- and postmenopausal women analyzed in relation to the body mass index within normal limits (BMI 20 to 24...
November 2018: Journal of Electrocardiology
Tomas Robyns, Dieter Nuyens, Hua Rong Lu, David J Gallacher, Bert Vandenberk, Christophe Garweg, Joris Ector, Efstathios Pagourelias, Johan Van Cleemput, Stefan Janssens, Rik Willems
INTRODUCTION: Preventing sudden cardiac death (SCD) is one of the main goals in hypertrophic cardiomyopathy (HCM). Many variables have been proposed, however the European and American guidelines do not incorporate any ECG or Holter monitoring derived variables other than the presence of ventricular arrhythmia in their risk stratification models. In the present study we evaluated electrocardiographic parameters in risk stratification of HCM. METHODS AND RESULTS: Novel electrocardiographic parameters including the index of cardio-electrophysiological balance (iCEB), individualized QT correction (QTi) and QT rate dependence were evaluated along with established risk factors...
November 2018: Journal of Electrocardiology
Christian A Barrera, Hansel J Otero, Ammie M White, David Saul, David M Biko
PURPOSE: Evaluate the feasibility and determinants of image quality of ECG-triggered High-Pitch Dual-Source Computed Tomography Angiography (CTA) for cardiovascular assessment in Children. MATERIAL AND METHODS: All children that underwent ECG-triggered High-Pitch Dual-Source CTA between August 2014 and September 2017 were identified. Scanner parameters and patients' information were retrieved. Objective image quality was evaluated measuring the Hounsfield units (HU) and standard deviation of regions of interests in the left ventricle, ascending and descending aorta...
October 29, 2018: Current Problems in Diagnostic Radiology
A Aranda Hernandez, P Bonizzi, J Karel, R Peeters
This research presents a novel statistical model for diagnosing acute myocardial infarction (AMI). The model is based on features extracted from a reduced lead system consisting of a subset of three leads from the standard 12-lead ECG. We selected a set of relevant parameters commonly used in the clinical practice for ECG-based AMI diagnosis, namely ST elevation and T-wave maximum. We also selectedfeatures, not used in clinical practice, that were derived from vectorcardiography and computed on the reduced three-lead system (pseudo-VCG parameters)...
July 2018: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
Christopher L Felton, Barry K Gilbert, Clifton R Haider
Continuous remote physiologic and environmental monitoring, employing an ever-increasing array of sensors, is now commonplace. Given the significant amount of data being digitized, two common sources of energy consumption can be targeted to improve device runtime: data storage and data transmission. One embedded method to maximize device runtime is inline low energy data compression. Herein we present a low complexity data encoding scheme. We list and characterize the parameters necessary for encoding. The encoding method is then evaluated and tuned using contrived data with varying degrees of covariance, as well as open-source electrocardiography (ECG) data...
July 2018: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
Thi Nhu Lan Nguyen, David Eager, Hung Tan Nguyen
The aim of this present research was to determine whether the cardiovascular function has been affected by wearing compression garments during the recovery phase. Fourteen subjects (men, $\text{n}=$7; women, $\textbf{n}=$7; $24.7 \pm 4.5$ years, $166.0 \pm 7.6$ cm; $60.9 \pm 12.0$ kg) completed a running protocol on a treadmill. Each subject participated in two running experiments, using either compression garments (CGs) or non- compression garments (NCGs) during exercise and 2 hours recovering time. Electrocardiogram (ECG) signals were collected during 2 hours recovery using wearable sensors...
July 2018: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
Nandakumar Selvaraj, Gabriel Nallathambi, Paul Kettle
Validation of biosensor algorithms is paramount for regulated medical devices applied to patient monitoring. We present validation of breathing rate (BR) measurement using a patch medical device via a novel synthetic simulation platform, in-hospital data collection and controlled laboratory study. Single-lead ECG and triaxial body acceleration signals with variability and noise are synthetically generated and quantized for a constellation according to the input parameters of heart rate (HR) as a fundamental frequency $( f_{c})$ of ECG and reference BR as a modulating frequency $( f_{r})$...
July 2018: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
Xinchi Yu, Michael Paul, Christoph Hoog Antink, Boudewijn Venema, Vladimir Blazek, Cornelius Bollheimer, Steffen Leonhardt, Daniel Teichmann
Heart rate variability (HRV) is an important clinical parameter associated with the autonomous nervous system (ANS), age, as well as many diseases such as myocardial infarction, diabetes or renal failure. Gold standard for measurement of HRV is a high-resolution electrocardiogram (ECG). With the current trend towards non-contact and unobtrusive monitoring of vital signs, HRV has also become an interesting and important parameter for non-contact monitoring. In this paper, we present an approach towards non-contact and unobtrusive monitoring of heart rate variability using the camera-based technology of photoplethysmography imaging (PPGI)...
July 2018: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
Syed Ghufran Khalid, Jufen Zhang, Fei Chen, Dingchang Zheng
Introduction: Blood pressure (BP) has been a potential risk factor for cardiovascular diseases. BP measurement is one of the most useful parameters for early diagnosis, prevention, and treatment of cardiovascular diseases. At present, BP measurement mainly relies on cuff-based techniques that cause inconvenience and discomfort to users. Although some of the present prototype cuffless BP measurement techniques are able to reach overall acceptable accuracies, they require an electrocardiogram (ECG) and a photoplethysmograph (PPG) that make them unsuitable for true wearable applications...
2018: Journal of Healthcare Engineering
Marcel Młyńczak, Hubert Krysztofiak
Training of elite athletes requires regular physiological and medical monitoring to plan the schedule, intensity and volume of training, and subsequent recovery. In sports medicine, ECG-based analyses are well-established. However, they rarely consider the correspondence of respiratory and cardiac activity. Given such mutual influence, we hypothesize that athlete monitoring might be developed with causal inference and that detailed, time-related techniques should be preceded by a more general, time-independent approach that considers the whole group of participants and parameters describing whole signals...
2018: Frontiers in Physiology
B Broux, D De Clercq, L Vera, S Ven, P Deprez, A Decloedt, G van Loon
BACKGROUND: Heart rate variability (HRV) parameters, and especially RMSSD (root mean squared successive differences in RR interval), could distinguish atrial fibrillation (AF) from sinus rhythm(SR) in horses, as was demonstrated in a previous study. If heart rate monitors (HRM) automatically calculating RMSSD could also distinguish AF from SR, they would be useful for the monitoring of AF recurrence. The objective of the study was to assess whether RMSSD values obtained from a HRM can differentiate AF from SR in horses...
October 25, 2018: BMC Veterinary Research
Sandeep Raj, Kailash Chandra Ray
BACKGROUND AND OBJECTIVE: Cardiovascular diseases (CVDs) are the leading cause of deaths worldwide. Due to an increase in the rate of global mortalities, biopathological signal processing and evaluation are widely used in the ambulatory situations for healthcare applications. For decades, the processing of pathological electrocardiogram (ECG) signals for arrhythmia detection has been thoroughly studied for diagnosis of various cardiovascular diseases. Apart from these studies, efficient diagnosis of ECG signals remains a challenge in the clinical cardiovascular domain due to its non-stationary nature...
October 2018: Computer Methods and Programs in Biomedicine
Jin Li, Dominic Wyrsch, Dik Heg, Michael Stoller, Thomas Zanchin, Tilman Perrin, Stephan Windecker, Lorenz Räber, Laurent Roten
BACKGROUND: The outcome of patients undergoing percutaneous coronary interventions (PCIs) varies considerably. Several ECG parameters have recently emerged (PQ interval, P-wave, T-peak-to-T-end interval, T-wave, T/R ratio, J-wave) beyond traditional markers (rhythm, QRS, Q-wave, QT interval, ST segment) and were attributed important prognostic value in the setting of coronary artery disease. The present study integrated for the first time these ECG parameters altogether with the aim to determine their role in predicting patients' outcome after a PCI...
October 17, 2018: Acta Cardiologica
Fábio Leitão, Eurico Moreira, Filipe Alves, Mário Lourenço, Olga Azevedo, João Gaspar, Luis A Rocha
Several devices and measurement approaches have recently been developed to perform ballistocardiogram (BCG) and seismocardiogram (SCG) measurements. The development of a wireless acquisition system (hardware and software), incorporating a novel high-resolution micro-electro-mechanical system (MEMS) accelerometer for SCG and BCG signals acquisition and data treatment is presented in this paper. A small accelerometer, with a sensitivity of up to 0.164 µs/µg and a noise density below 6.5 µg/ Hz is presented and used in a wireless acquisition system for BCG and SCG measurement applications...
October 13, 2018: Sensors
Nigel Gebodh, Zeinab Esmaeilpour, Devin Adair, Kenneth Chelette, Jacek Dmochowski, Adam J Woods, Emily S Kappenman, Lucas C Parra, Marom Bikson
Online imaging and neuromodulation is invalid if stimulation distorts measurements beyond the point of accurate measurement. In theory, combining transcranial Direct Current Stimulation (tDCS) with electroencephalography (EEG) is compelling, as both use non-invasive electrodes and image-guided dose can be informed by the reciprocity principle. To distinguish real changes in EEG from stimulation artifacts, prior studies applied conventional signal processing techniques (e.g. high-pass filtering, ICA). Here, we address the assumptions underlying the suitability of these approaches...
October 12, 2018: NeuroImage
Hamed Haghi-Aminjan, Maryam Baeeri, Mahban Rahimifard, Ahad Alizadeh, Mahshid Hodjat, Shokoufeh Hassani, Mohammad Hossein Asghari, Alireza Abdollahi, Tina Didari, Rohollah Hosseini, Mohammad Sharifzadeh, Mohammad Abdollahi
Poisoning with aluminum phosphide (AlP) has been attributed to the high rate of mortality among many Asian countries. It affects several organs, mainly heart and kidney. Numerous literature demonstrated the valuable effect of minocycline in mitigating pathological symptoms of heart and kidney disease. The aim of the present study was to evaluate the probable protective effect of minocycline on cardiac hemodynamic parameters abnormalities and renal toxicity induced by AlP-poisoning in the rat model. AlP was administered by gavage at 12 mg/kg body weight followed by injection of minocycline for two interval times of 12 and 24 h, at 40, 80, 120 mg/kg body weight...
October 2, 2018: Environmental Toxicology and Pharmacology
Xiqiang Wang, Jingjing Sun, Zhuokun Feng, Yuan Gao, Chaofeng Sun, Guoliang Li
Wellens' syndrome is characterised by particular changes in electrocardiogram (ECG) precordial lead T-waves accompanied by proximal stenosis of the left anterior descending (LAD) artery. Two cases of electrocardiographic changes associated with Wellens' syndrome are presented here. Case 1, a 55-year-old female, was transferred to the First Affiliated Hospital of Xi'an Jiaotong University with intermittent and laborious angina pectoris. Her first ECG on admission revealed T-wave inversion in leads V1-V3 and biphasic T-waves in V4...
October 3, 2018: Journal of International Medical Research
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