15,147 results match your criteria ecg parameters


Relationship between electrocardiogram-based features and personality traits: Machine learning approach.

Ann Noninvasive Electrocardiol 2021 Nov 27:e12919. Epub 2021 Nov 27.

Faculty of Medicine, University of Belgrade, Belgrade, Serbia.

Background: Based on the known relationship between the human emotion and standard surface electrocardiogram (ECG), we explored the relationship between features extracted from standard ECG recorded during relaxation and seven personality traits (Honesty/humility, Emotionality, eXtraversion, Agreeableness, Conscientiousness, Openness, and Disintegration) by using the machine learning (ML) approach which learns from the ECG-based features and predicts the appropriate personality trait by adopting an automated software algorithm.

Methods: A total of 71 healthy university students participated in the study. For quantification of 62 ECG-based parameters (heart rate variability, as well as temporal and amplitude-based parameters) for each ECG record, we used computation procedures together with publicly available data and code. Read More

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November 2021

Pharmacological evaluation of Vitis vinifera and Zingiber zerumbet on electrocardiographic, biochemical alterations and antioxidant status in isoproterenol-induced myocardial infarction in rats.

Pak J Pharm Sci 2021 Sep;34(5(Supplementary)):1929-1937

Department of Pharmacy, University of Agriculture, Faisalabad, Pakistan.

The Vitis vinifera (VV) and Zingiber zerumbet (ZZ) are popular functional foods which are used for the treatment of cardiovascular ailments. These possess antiproliferative, antiplatelet and antioxidant effects. The current study has been designed to ascertain their effectiveness against Isoproterenol (ISO)-induced myocardial infarction (MI). Read More

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September 2021

Invisible ECG for High Throughput Screening in eSports.

Sensors (Basel) 2021 Nov 16;21(22). Epub 2021 Nov 16.

IT-Instituto de Telecomunicações, 1049-001 Lisboa, Portugal.

eSports is a rapidly growing industry with increasing investment and large-scale international tournaments offering significant prizes. This has led to an increased focus on individual and team performance with factors such as communication, concentration, and team intelligence identified as important to success. Over a similar period of time, personal physiological monitoring technologies have become commonplace with clinical grade assessment available across a range of parameters that have evidenced utility. Read More

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November 2021

The Effects of Different Hormones on Supraventricular and Ventricular Premature Contractions in Healthy Premenopausal Women.

Medicina (Kaunas) 2021 Oct 24;57(11). Epub 2021 Oct 24.

Second Department of Internal Medicine, Attikon University Hospital, Medical School, National and Kapodistrian University of Athens, 12462 Athens, Greece.

: The effects of gender differences on cardiac parameters have been well-established. In this study, we aimed to evaluate the possible associations of plasma levels of different sex hormones with premature atrial or ventricular contractions in premenopausal women. : We conducted a prospective study which included women in late reproductive age who presented with palpitations during an eight-month period. Read More

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October 2021

Diagnostic Value of the TpTe Interval in Children with Ventricular Arrhythmias.

Int J Environ Res Public Health 2021 Nov 20;18(22). Epub 2021 Nov 20.

Faculty of Science and Technology, University of Silesia in Katowice, Bankowa 14, 40-007 Katowice, Poland.

Background: The changes in the period of ventricular repolarization, i.e., QT interval, QTp (Q-Tpeak) and TpTe interval (Tpeak-Tend), make it possible to assess the electrical instability of the heart muscle, which may lead to the development of life-threatening ventricular arrhythmia. Read More

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November 2021

Evaluation of Stress Levels of Trainee Cardiac Surgery Residents during Training Interventions Using Physiological Stress Parameters.

Int J Environ Res Public Health 2021 Nov 14;18(22). Epub 2021 Nov 14.

Department of Occupational Medicine, Otto-von-Guericke University Magdeburg, Leipziger Strasse 44, 39120 Magdeburg, Germany.

Background: This study analysed the psychological and psycho-emotional stress in cardiac surgery. Using heart rate variability (HRV) analysis, it is possible to record intraoperative objective stress responses in surgeons. The aim of the study was to assess with the help of HRV parameters the postulated increased stress levels of cardiac surgeons in training compared to experienced senior cardiothoracic surgeons in exactly the same work situation in order to make qualification-differentiated statements about physiological stress during surgical interventions. Read More

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November 2021

Assessment of Selected Baseline and Post-PCI Electrocardiographic Parameters as Predictors of Left Ventricular Systolic Dysfunction after a First ST-Segment Elevation Myocardial Infarction.

J Clin Med 2021 Nov 22;10(22). Epub 2021 Nov 22.

Department of Cardiology and Internal Medicine, Collegium Medicum, Nicolaus Copernicus University, ul. Skłodowskiej-Curie 9, 85-094 Bydgoszcz, Poland.

Objective: To assess the performance of ten electrocardiographic (ECG) parameters regarding the prediction of left ventricular systolic dysfunction (LVSD) after a first ST-segment-elevation myocardial infarction (STEMI).

Methods: We analyzed 249 patients (74.7% males) treated with primary percutaneous coronary intervention (PCI) included into a single-center cohort study. Read More

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November 2021

Clinical Predictors of Mortality in Prehospital Distress Calls by Emergency Medical Service Subscribers.

J Clin Med 2021 Nov 17;10(22). Epub 2021 Nov 17.

Hadassah Medical Center, Cardiology Department, Faculty of Medicine, Hebrew University Jerusalem, Jerusalem 91905, Israel.

(1) Introduction: Most studies rely on in-hospital data to predict cardiovascular risk and do not include prehospital information that is substantially important for early decision making. The aim of the study was to define clinical parameters in the prehospital setting, which may affect clinical outcomes. (2) Methods: In this population-based study, we performed a retrospective analysis of emergency calls that were made by patients to the largest private emergency medical services (EMS) in Israel, SHL Telemedicine Ltd. Read More

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November 2021

Long-Term Cardiac Sequelae in Patients Referred into a Diagnostic Post-COVID-19 Pathway: The Different Impacts on the Right and Left Ventricles.

Diagnostics (Basel) 2021 Nov 6;11(11). Epub 2021 Nov 6.

Department of Medicine and Surgery, University of Parma, 43100 Parma, Italy.

Most patients who had COVID-19 are still symptomatic after many months post infection, but the long-term outcomes are not yet well defined. The aim of our prospective/retrospective study was to define the cardiac sequelae of COVID-19 infection. This monocentric cohort study included 160 consecutive patients who had been discharged from the ward or from the outpatient clinic after a diagnosis of COVID-19 and subsequently referred for a follow-up visit. Read More

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November 2021

Characteristics of Children Likely to Have Spontaneous Resolution of Obstructive Sleep Apnea: Results from the Childhood Adenotonsillectomy Trial (CHAT).

Children (Basel) 2021 Oct 29;8(11). Epub 2021 Oct 29.

Department of Pediatrics, Faculty of Medicine & Dentistry, University of Alberta, Edmonton, AB T6G 2R3, Canada.

Objective: To evaluate if cardiopulmonary coupling (CPC) calculated sleep quality (SQI) may have a role in identifying children that may benefit from other intervention than early adenotonsillectomy (eAT) in management of obstructive sleep apnea (OSA).

Methods: A secondary analysis of electrocardiogram-signals (ECG) and oxygen saturation-data (SpO) collected during polysomnography-studies in the prospective multicenter Childhood Adenotonsillectomy Trial (CHAT) to calculate CPC-SQI and apnea hypopnea index (AHI) was executed. In the CHAT, children 5-9 years with OSA without prolonged oxyhemoglobin desaturations were randomly assigned to adenotonsillectomy (eAT) or watchful waiting with supportive care (WWSC). Read More

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October 2021

Non-invasive fetal electrocardiography, electrohysterography and speckle-tracking echocardiography in the second trimester: study protocol of a longitudinal prospective cohort study (BEATS-study).

BMC Pregnancy Childbirth 2021 Nov 25;21(1):791. Epub 2021 Nov 25.

Department of Gynaecology and Obstetrics, Máxima MC, P.O. Box 7777, 5500 MB, Veldhoven, The Netherlands.

Background: Worldwide, hypertensive disorders of pregnancy (HDP), fetal growth restriction (FGR) and preterm birth remain the leading causes of maternal and fetal pregnancy-related mortality and (long-term) morbidity. Fetal cardiac deformation changes can be the first sign of placental dysfunction, which is associated with HDP, FGR and preterm birth. In addition, preterm birth is likely associated with changes in electrical activity across the uterine muscle. Read More

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November 2021

Detection of doxorubicin-induced cardiotoxicity using myocardial T1 and T2 relaxation times in childhood acute lymphoblastic leukemia survivors.

Int J Cardiovasc Imaging 2021 Nov 25. Epub 2021 Nov 25.

Department of Mechanical Engineering, Polytechnique Montreal, Station Centre-Ville, P.O. Box 6079, Montréal, QC, H3C 3A7, Canada.

Doxorubicin leads to dose-dependent cardiotoxicity in childhood acute lymphoblastic leukemia (ALL) survivors. The first aim was to propose a contour-based estimation of T1 and T2 relaxation times based on the myocardial area, while our second aim was to evaluate native T1, post-gadolinium T1 and T2 relaxation time sensitivity to detect myocardial changes. A total of 84 childhood ALL survivors were stratified in regard to their prognostic risk groups: standard risk (SR), n = 20), high-risk with and without dexrazoxane (HR + DEX, n = 39 and HR, n = 25). Read More

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November 2021

Frontal QRS-T angle as a predictive marker for myocardial damage in acute carbon monoxide poisoning.

Hum Exp Toxicol 2021 Nov 24:9603271211043477. Epub 2021 Nov 24.

Faculty of Medicine, Department of Emergency Medicine, 52954Sivas Cumhuriyet University, Sivas, Turkey.

Introduction: The present study was undertaken to investigate the prognostic value of the frontal QRS-T angle associated with adverse cardiac outcomes in patients with carbon monoxide (CO) poisoning in early stages in the emergency department.

Materials And Methods: The data of 212 patients with CO poisoning who were admitted to the ED between January 2010 and May 2020 were retrospectively analyzed. The frontal QRS-T angle was obtained from the automatic reports of the EKG device. Read More

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November 2021

Effect of aging and sex on cardiovascular structure and function in wildtype mice assessed with echocardiography.

Sci Rep 2021 Nov 23;11(1):22800. Epub 2021 Nov 23.

Department of Medicine, University of Pennsylvania, Philadelphia, PA, 19104, USA.

This study employed traditional and advanced echocardiographic techniques to assess comprehensively age- and sex-related changes in cardiovascular structure and function in wildtype (WT) mice. Forty-five normal adult wildtype mice were apportioned to groups based on age and sex: 2-month (young) male or female, and 24-month (old) male or female (n = 13, 13, 13, and 6, respectively). Each underwent 2-dimensional (2D) imaging echocardiography, Doppler, tissue Doppler imaging echocardiography, and speckle-tracking echocardiography (STE) for comparison of cardiovascular structure and function parameters. Read More

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November 2021

Gestational Age and Neonatal Electrocardiograms.

Pediatrics 2021 Nov 24. Epub 2021 Nov 24.

Department of Cardiology, Herlev-Gentofte Hospital, Copenhagen University Hospital, Copenhagen, Denmark.

Objectives: Interpretation of the neonatal electrocardiogram (ECG) is challenging due to the profound changes of the cardiovascular system in this period. We aimed to investigate the impact of gestational age (GA) on the neonatal ECG and create GA-specific reference values.

Methods: The Copenhagen Baby Heart Study is a prospective general population study that offered cardiac evaluation of neonates. Read More

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November 2021

New Precordial T wave Inversions in Hospitalized Patients.

Am J Med 2021 Nov 20. Epub 2021 Nov 20.

Division of Cardiovascular Medicine, University of California San Francisco, Fresno, California.

Background: The incidence of precordial T changes has been described in athletes and in specific populations, while the etiology in a large patient population admitted to the hospital has not previously been reported.

Methods: All ECGs read by the same physician with new (compared to prior ECGs) or presumed new (no prior ECGs) precordial T wave inversions of >1 mm (0.1 mV) in multiple precordial leads were retrospectively reviewed and various ECG, patient-related and imaging parameters assessed. Read More

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November 2021

Characteristics of the Dynamic Electrocardiogram in the Elderly with Nonvalvular Atrial Fibrillation Combined with Long R-R Intervals.

Evid Based Complement Alternat Med 2021 10;2021:4485618. Epub 2021 Nov 10.

ECG Diagnosis Department, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi 530021, China.

Objective: To investigate the characteristics of dynamic electrocardiogram and their clinical implications in elderly patients with nonvalvular atrial fibrillation combined with long R-R intervals.

Methods: Elderly patients diagnosed with nonvalvular atrial fibrillation who were admitted as an inpatient or attended the outpatient department from January 2015 to January 2020 were selected. Patients were divided into two groups based on the presence of a long R-R interval. Read More

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November 2021

The effects of frequency-specific, non-invasive, median nerve stimulation on food-related attention and appetite.

Appetite 2021 Nov 16:105807. Epub 2021 Nov 16.

Department of Anatomy, School of Biomedical Sciences, University of Otago, Dunedin, New Zealand; Brain Health Research Centre, Dunedin, New Zealand; Medical Technologies Centre of Research Excellence, Auckland, New Zealand. Electronic address:

Median nerve stimulation (MNS) in the existing literature has been used for treating gastrointestinal disorders and amelioration of nausea and vomiting. Recently, studies have shown that MNS can also exert effects on olfactory performances and corresponding anatomical regions through the activation of vagal pathways. This study aimed to test effects of specific frequencies of MNS on food-related attention and appetite. Read More

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November 2021

Hourly variability in outflow tract ectopy as a predictor of its site of origin.

J Cardiovasc Electrophysiol 2021 Nov 19. Epub 2021 Nov 19.

St George's University of London, Cranmer Terrace, London, UK.

Introduction: Before ablation, predicting the site of origin (SOO) of outflow tract ventricular arrhythmia (OTVA), can inform patient consent and facilitate appropriate procedural planning. We set out to determine if OTVA variability can accurately predict SOO.

Methods: Consecutive patients with a clear SOO identified at OTVA ablation had their prior 24-h ambulatory ECGs retrospectively analysed (derivation cohort). Read More

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November 2021

A Digital Electrocardiographic System for Assessing Myocardial Electrical Instability: Principles and Applications.

Sovrem Tekhnologii Med 2021 28;12(6):15-19. Epub 2020 Dec 28.

Professor, Head of the Laboratory of Medical Information Technologies Republican Scientific and Practical Center "Cardiology", Ministry of Health of the Republic of Belarus, 110B Rosa Luxemburg St., Minsk, 220036, Republic of Belarus.

was to develop an ECG hardware and software system for monitoring electrical instability of the myocardium and to assess the diagnostic and prognostic capabilities of this setup in a cardiology clinic.

Materials And Methods: The Intecard 7.3 software and hardware system developed in this study makes it possible to measure fluctuations of the ECG amplitude-time parameters using the beat-to-beat mode. Read More

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December 2020

Right ventricular dysfunction by computed tomography associates with outcomes in severe aortic stenosis patients undergoing transcatheter aortic valve replacement.

J Cardiovasc Comput Tomogr 2021 Nov 14. Epub 2021 Nov 14.

Cardiovascular Imaging Research Center and Core Lab, Minneapolis Heart Institute Foundation, Minneapolis, MN, USA; Minneapolis Heart Institute, Abbott Northwestern Hospital, Minneapolis, MN, USA. Electronic address:

Background: Although cardiac computed tomography angiography (CCTA) assessment of right ventricular dysfunction (RVD) is feasible, the incremental prognostic value remains uncertain in patients undergoing transcatheter aortic valve replacement (TAVR) evaluation. This study sought to determine the incremental clinical utility of RVD identification by CCTA while accounting for clinical and echocardiographic parameters.

Methods: Patients who underwent multiphasic ECG-gated functional CCTA using dual-source system for routine TAVR planning were evaluated. Read More

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November 2021

Detection and Spatial Correlation Analysis of Infectious Diseases Using Wireless Body Area Network Under Imperfect Wireless Channel.

Big Data 2021 Nov 16. Epub 2021 Nov 16.

Department of Electrical and Electronic Engineering, Hanyang University, Ansan, South Korea.

The biosensors on a human body form a wireless body area network (WBAN) that can examine various physiological parameters, such as body temperature, electrooculography, electromyography, electroencephalography, and electrocardiography. Deep learning can use health information from the embedded sensors on the human body that can help monitoring diseases and medical disorders, including breathing issues and fever. In the context of communication, the links between the sensors are influenced by fading due to diffraction, reflection, shadowing by the body, clothes, body movement, and the surrounding environment. Read More

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November 2021

Cancer classification using machine learning and HRV analysis: preliminary evidence from a pilot study.

Sci Rep 2021 Nov 16;11(1):22292. Epub 2021 Nov 16.

Institute of Psychology, University of Graz, Graz, Austria.

Most cancer patients exhibit autonomic dysfunction with attenuated heart rate variability (HRV) levels compared to healthy controls. This research aimed to create and evaluate a machine learning (ML) model enabling discrimination between cancer patients and healthy controls based on 5-min-ECG recordings. We selected 12 HRV features based on previous research and compared the results between cancer patients and healthy individuals using Wilcoxon sum-rank test. Read More

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November 2021

Importance of Imaging in Work up of Cardiovascular Diseases by Using Telemedicine in Rural India.

J Assoc Physicians India 2021 Nov;69(11):11-12

BCLT Intern, Jamia Hamdard and National Heart Institute.

Background: Cardiovascular diseases have emerged as an epidemic in India. Telemedicine is a useful tool for sending ECG, x-ray and ultrasound images to telemedicine centre for diagnosis and management of cardiovascular diseases in rural areas as it overcomes the distance barrier.

Methods: National Heart Institute collaborated with Hospital Guide Foundation (HGF) Jewar, Greater Noida for conducting telemedicine sessions. Read More

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November 2021

O-WCNN: an optimized integration of spatial and spectral feature map for arrhythmia classification.

Complex Intell Systems 2021 Apr 26:1-14. Epub 2021 Apr 26.

Department of Computer Science, Middlesex University, London, UK.

The regular monitoring and accurate diagnosis of arrhythmia are critically important, leading to a reduction in mortality rate due to cardiovascular diseases (CVD) such as heart stroke or cardiac arrest. This paper proposes a novel convolutional neural network (CNN) model for arrhythmia classification. The proposed model offers the following improvements compared with traditional CNN models. Read More

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Diagnosis of Cardiac Rehabilitation after Percutaneous Coronary Intervention in Acute Myocardial Infarction Patients by Emission Computed Tomography Image Features under Filtered Back Projection Reconstruction Algorithm.

Authors:
Yuan Lv Suyu Zhao

J Healthc Eng 2021 22;2021:6844549. Epub 2021 Oct 22.

Department of Cardiology, Lishui People's Hospital, Lishui 323000, Zhejiang, China.

This study aimed to explore the application value of emission computed tomography (ECT) imaging technology based on filtered back projection reconstruction algorithm (FBP) in cardiac function examination after percutaneous coronary intervention (PCI) in patients with acute myocardial infarction (AMI). Eighty patients with myocardial infarction diagnosed by medical history, electrocardiograph (ECG), and myocardial enzyme admitted to hospital from February 2018 to February 2019 were selected as the research objects. All patients underwent PCI seven days after the onset of myocardial infarction. Read More

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October 2021

Development of an IoT-Based Sleep Apnea Monitoring System for Healthcare Applications.

Comput Math Methods Med 2021 3;2021:7152576. Epub 2021 Nov 3.

Department of Electrical and Computer Engineering, North South University, Bashundhara, Dhaka 1229, Bangladesh.

Sleep is an essential and vital element of a person's life and health that helps to refresh and recharge the mind and body of a person. The quality of sleep is very important in every person's lifestyle, removing various diseases. Bad sleep is a big problem for a lot of people for a very long time. Read More

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November 2021

Prediction of Atrial Fibrillation Using Machine Learning: A Review.

Front Physiol 2021 28;12:752317. Epub 2021 Oct 28.

Department of Cardiovascular Diseases, Mayo Clinic, Rochester, MN, United States.

There has been recent immense interest in the use of machine learning techniques in the prediction and screening of atrial fibrillation, a common rhythm disorder present with significant clinical implications primarily related to the risk of ischemic cerebrovascular events and heart failure. Prior to the advent of the application of artificial intelligence in clinical medicine, previous studies have enumerated multiple clinical risk factors that can predict the development of atrial fibrillation. These clinical parameters include previous diagnoses, laboratory data (e. Read More

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October 2021

Non-invasive Characterization of Human AV-Nodal Conduction Delay and Refractory Period During Atrial Fibrillation.

Front Physiol 2021 28;12:728955. Epub 2021 Oct 28.

Department of Systems and Data Analysis, Fraunhofer-Chalmers Centre, Gothenburg, Sweden.

During atrial fibrillation (AF), the heart relies heavily on the atrio-ventricular (AV) node to regulate the heart rate. Thus, characterization of AV-nodal properties may provide valuable information for patient monitoring and prediction of rate control drug effects. In this work we present a network model consisting of the AV node, the bundle of His, and the Purkinje fibers, together with an associated workflow, for robust estimation of the model parameters from ECG. Read More

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October 2021

Biopotential Signal Monitoring Systems in Rehabilitation: A Review.

Sensors (Basel) 2021 Oct 28;21(21). Epub 2021 Oct 28.

Department of Medical and Surgical Sciences, Magna Græcia University, 88100 Catanzaro, Italy.

Monitoring physical activity in medical and clinical rehabilitation, in sports environments or as a wellness indicator is helpful to measure, analyze and evaluate physiological parameters involving the correct subject's movements. Thanks to integrated circuit (IC) technologies, wearable sensors and portable devices have expanded rapidly in monitoring physical activities in sports and tele-rehabilitation. Therefore, sensors and signal acquisition devices became essential in the tele-rehabilitation path to obtain accurate and reliable information by analyzing the acquired physiological signals. Read More

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October 2021