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ambulatory ECG monitoring

Daniele Bosone, Roberto Fogari, Matteo Cotta Ramusino, Natascia Ghiotto, Elena Guaschino, Annalisa Zoppi, Angela D'Angelo, Alfredo Costa
The aim of the study was to evaluate the usefulness of Holter monitoring for the detection of silent myocardial ischemia (SMI) in elderly type 2 diabetic patients with hypertension and the possible relationship between SMI and cardiovascular autonomic neuropathy (CAN). Two hundred and forty-three asymptomatic outpatients, aged 65-75 years, with type 2 diabetes and essential hypertension underwent 24-h ECG monitoring and 5 tests for the evaluation of both parasympathetic (heart rate variability, response to breath deeping, and Valsalva manoeuvre) and sympathetic (cold pressor test and orthostatic hypotension test) autonomic function...
October 6, 2016: Heart and Vessels
Abimbola A Akintola, Vera van de Pol, Daniel Bimmel, Arie C Maan, Diana van Heemst
Background: The Equivital (EQ02) is a multi-parameter telemetric device offering both real-time and/or retrospective, synchronized monitoring of ECG, HR, and HRV, respiration, activity, and temperature. Unlike the Holter, which is the gold standard for continuous ECG measurement, EQO2 continuously monitors ECG via electrodes interwoven in the textile of a wearable belt. Objective: To compare EQ02 with the Holter for continuous home measurement of ECG, heart rate (HR), and heart rate variability (HRV). Methods: Eighteen healthy participants wore, simultaneously for 24 h, the Holter and EQ02 monitors...
2016: Frontiers in Physiology
Bor-Cheng Han, I-Jung Liu, Hsiao-Chi Chuang, Chih-Hong Pan, Kai-Jen Chuang
Welding fume exposure is associated with heart rate variability (HRV) reduction. It is still unknown whether respirator can reduce effect of welding fume on HRV among welding workers in a shipyard. We recruited 68 welding workers with respirator and 52 welding workers without respirator to measure HRV indices, including standard deviation of normal-to-normal intervals (SDNN) and square root of the mean squared differences of successive intervals (r-MSSD) by ambulatory electrocardiographic (ECG). Personal exposure to particulate matter less than or equal to 2...
September 28, 2016: Scientific Reports
Hau-Tieng Wu, Gregory F Lewis, Maria I Davila, Ingrid Daubechies, Stephen W Porges
BACKGROUND: With recent advances in sensor and computer technologies, the ability to monitor peripheral pulse activity is no longer limited to the laboratory and clinic. Now inexpensive sensors, which interface with smartphones or other computer-based devices, are expanding into the consumer market. When appropriate algorithms are applied, these new technologies enable ambulatory monitoring of dynamic physiological responses outside the clinic in a variety of applications including monitoring fatigue, health, workload, fitness, and rehabilitation...
October 17, 2016: Methods of Information in Medicine
Alfredo Costa, Daniele Bosone, Matteo Cotta Ramusino, Natascia Ghiotto, Elena Guaschino, Annalisa Zoppi, Angela D'Angelo, Roberto Fogari
PURPOSE: The aim of this study was to evaluate the relationship between orthostatic hypotension (OH), defined as a decrease in systolic blood pressure (SBP) ≥20 mmHg and/or a decrease in diastolic blood pressure (DBP) ≥10 mmHg, and 24-h ambulatory BP profile in elderly hypertensive type 2 diabetic patients. METHODS: After a 2-week antihypertensive wash-out period, 200 hypertensive well-controlled diabetic outpatients, aged 65-75 years, underwent a clinical examination, including BP measurements, ECG, 24-h ABP monitoring (ABPM), an orthostatic test, and three tests for cardiovascular autonomic function assessment [deep breathing, heart rate (HR) variability, resting HR]...
September 13, 2016: Clinical Autonomic Research: Official Journal of the Clinical Autonomic Research Society
Daniel A Frese, Christopher D Reinhardt, Steven J Bartle, David N Rethorst, Bhupinder Bawa, Justin D Thomason, Guy H Loneragan, Daniel U Thomson
OBJECTIVE To investigate the effects of dietary supplementation with the β-adrenoceptor agonists ractopamine hydrochloride and zilpaterol hydrochloride on ECG and clinicopathologic variables of finishing beef steers. DESIGN Randomized controlled trial. ANIMALS 30 Angus steers. PROCEDURES Steers were grouped by body weight and randomly assigned to receive 1 of 3 diets for 23 days: a diet containing no additive (control diet) or a diet containing ractopamine hydrochloride (300 mg/steer/d) or zilpaterol hydrochloride (8...
September 15, 2016: Journal of the American Veterinary Medical Association
Mohamed Abdelazez, Patrick Quesnel, Adrian Chan, Homer Yang
: The objective of this study is to propose and validate an alarm gating system for a myocardial ischemia monitoring system that uses ambulatory electrocardiogram (AECG). The PeriOperative ISchemic Evaluation (POISE) study recommended the selective administration of β blockers to patients at risk of cardiac events following non-cardiac surgery. Patients at risk are identified by monitoring ST-segment deviations in the electrocardiogram (ECG); however, patients are encouraged to ambulate to improve recovery, which deteriorates the signal quality of the ECG leading to false alarms...
August 25, 2016: IEEE Transactions on Bio-medical Engineering
Jean Hai Ein Yong, Kednapa Thavorn, Jeffrey S Hoch, Muhammad Mamdani, Kevin E Thorpe, Paul Dorian, Mike Sharma, Andreas Laupacis, David J Gladstone
BACKGROUND AND PURPOSE: Prolonged ambulatory ECG monitoring after cryptogenic stroke improves detection of covert atrial fibrillation, but its long-term cost-effectiveness is uncertain. METHODS: We estimated the cost-effectiveness of noninvasive ECG monitoring in patients aged ≥55 years after a recent cryptogenic stroke and negative 24-hour ECG. A Markov model used observed rates of atrial fibrillation detection and anticoagulation from a randomized controlled trial (EMBRACE) and the published literature to predict lifetime costs and effectiveness (ischemic strokes, hemorrhages, life-years, and quality-adjusted life-years [QALYs]) for 30-day ECG (primary analysis) and 7-day or 14-day ECG (secondary analysis), when compared with a repeat 24-hour ECG...
September 2016: Stroke; a Journal of Cerebral Circulation
Richard L Verrier, Bruce D Nearing, Bryan Olin, Paul Boon, Steven C Schachter
OBJECTIVE: Reports of cardiac arrhythmias and cardiac pathology at postmortem examination of patients with epilepsy suggest a possible cardiac component of risk for sudden unexpected death in epilepsy (SUDEP). T-wave alternans (TWA) is an established marker of cardiac electrical instability and risk for sudden death in patients with cardiovascular disease. We determined the TWA level before vagus nerve stimulation (VNS) system implantation and subsequently the effect of VNS on TWA in patients with drug-resistant epilepsy...
September 2016: Epilepsy & Behavior: E&B
Ryuta Henmi, Koichiro Ejima, Morio Shoda, Daigo Yagishita, Nobuhisa Hagiwara
INTRODUCTION: Many patients with successful atrial flutter (AFL) ablation will develop atrial fibrillation (AF) during follow-up. This study aimed to determine whether prolonged interatrial conduction time (IACT) is associated with risk for new-onset AF after ablation of isolated, typical AFL. METHODS: Participants were 80 consecutive patients who underwent successful radiofrequency ablation of isolated, typical AFL from 2004 to 2012. Patients with any history of AF prior to AFL ablation were excluded...
July 16, 2016: Journal of Cardiovascular Electrophysiology
Jodi D Edwards, Moira K Kapral, Jiming Fang, Gustavo Saposnik, David J Gladstone
BACKGROUND AND PURPOSE: Detection and treatment of atrial fibrillation is a major goal in secondary stroke prevention. Guidelines recommend at least 24 hours of ECG monitoring after stroke. However, it is unclear how often this is done in routine practice. METHODS: In this longitudinal cohort study using data from the Ontario Stroke Registry, we analyzed consecutive patients presenting to designated stroke centers in Ontario, Canada (2003-2013) with a first acute ischemic stroke or transient ischemic attack (TIA) in sinus rhythm and without known atrial fibrillation...
August 2016: Stroke; a Journal of Cerebral Circulation
Zhipeng Cai, Kan Luo, Jianqing Li
Ambulatory electrocardiogram (ECG) monitoring can effectively reduce the risk and death rate of patients with cardiovascular diseases (CVDs). The Body Sensor Network (BSN) based ECG monitoring is a new and efficien method to protect the CVDs patients. To meet the challenges of miniaturization, low power and high signal quality of the node, we proposed a novel 50 mmX 50 mmX 10 mm, 30 g wireless ECG node, which includes the single-chip an alog front-end AD8232, ultra-low power microprocessor MSP430F1611 and Bluetooth module HM-11...
February 2016: Sheng Wu Yi Xue Gong Cheng Xue za Zhi, Journal of Biomedical Engineering, Shengwu Yixue Gongchengxue Zazhi
Erica D Walker, Anthony Brammer, Martin G Cherniack, Francine Laden, Jennifer M Cavallari
BACKGROUND: While previous epidemiological studies report adverse effects of long-term noise exposure on cardiovascular health, the mechanisms responsible for these effects are unclear. We sought to elucidate the cardiovascular and stress response to short-term, low (31.5-125Hz) and high (500-2000Hz) frequency noise exposures. METHODS: Healthy male (n=10) participants were monitored on multiple visits during no noise, low- or high-frequency noise exposure scenarios lasting 40min...
October 2016: Environmental Research
Alistair Mackett, Muhibbur Chowdhury, Saugata Das
No abstract text is available yet for this article.
June 1, 2016: Clinical Medicine: Journal of the Royal College of Physicians of London
Mikko Jalanko, Mika Tarkiainen, Petri Sipola, Pertti Jääskeläinen, Kirsi Lauerma, Mika Laine, Markku S Nieminen, Markku Laakso, Tiina Heliö, Johanna Kuusisto
OBJECTIVE: We assessed the value of speckle tracking two-dimensional (2D) strain echocardiography (2DSE) measured mechanical dispersion (MD) with other imaging and electrocardiographic parameters in differentiating hypertrophic cardiomyopathy (HCM) patients with and without nonsustained ventricular tachycardia (NSVT) on 24-h ambulatory ECG monitoring. METHODS AND RESULTS: We studied 31 patients with HCM caused by the Finnish founder mutation MYBPC3-Q1061X and 20 control subjects with comprehensive 2DSE echocardiography and cardiac magnetic resonance imaging (CMRI)...
June 1, 2016: Annals of Medicine
Esmé Jansen van Vuren, Leoné Malan, Roland von Känel, Marike Cockeran, Nicolaas T Malan
Inflammation may contribute to an increase in cardiac wall stress through pathways related to cardiac remodeling. Cardiac remodeling is characterized by myocyte hypertrophy, myocyte death and modifications of the extracellular matrix. We sought to explore associations among cardiac remodeling, inflammation and myocardial cell injury in a bi-ethnic cohort of South African men and women. We included 165 men (76 African and 89 Caucasian) and 174 women (80 African and 94 Caucasian) between 20 and 65 years of age...
September 2016: Hypertension Research: Official Journal of the Japanese Society of Hypertension
Milena Soriano Marcolino, Renato Minelli Figueira, Julia Pereira Afonso Dos Santos, Clareci Silva Cardoso, Antonio Luiz Ribeiro, Maria Beatriz Alkmim
BACKGROUND: In Brazil, the majority of healthcare resources are concentrated in the largest cities, whereas most communities lack proper healthcare assistance in primary care and have difficulties accessing specialists and diagnostic examinations. Considering this, the Telehealth Network of Minas Gerais (TNMG) was created. It is a public telehealth initiative that provides support to primary healthcare (PHC), performing teleconsultation and telediagnosis (electrocardiogram [ECG], Holter, ambulatory blood pressure monitoring, spirometry, and retinography analysis) mainly for small and remote cities in the state of Minas Gerais, Brazil...
May 11, 2016: Telemedicine Journal and E-health: the Official Journal of the American Telemedicine Association
Robert M Carney, Kenneth E Freedland, Brian C Steinmeyer, Eugene H Rubin, Phyllis K Stein, Michael W Rich
BACKGROUND: Previous studies suggest that patients with coronary heart disease (CHD) who do not respond to treatment for depression are at higher risk of mortality than are treatment responders. The purpose of this study was to determine whether elevated nighttime heart rate (HR) and low heart rate variability (HRV), both of which have been associated with depression and with cardiac events in patients with CHD, predict poor response to depression treatment in patients with CHD. METHODS: Patients with stable CHD and a current major depressive episode completed 24h ambulatory ECG monitoring and were then treated for up to 16 weeks with cognitive behavior therapy (CBT), either alone or in combination with an antidepressant...
August 2016: Journal of Affective Disorders
Rachel Lampert, Keri Tuit, Kwang-Ik Hong, Theresa Donovan, Forrester Lee, Rajita Sinha
Whether cumulative stress, including both chronic stress and adverse life events, is associated with decreased heart rate variability (HRV), a non-invasive measure of autonomic status which predicts poor cardiovascular outcomes, is unknown. Healthy community dwelling volunteers (N = 157, mean age 29 years) participated in the Cumulative Stress/Adversity Interview (CAI), a 140-item event interview measuring cumulative adversity including major life events, life trauma, recent life events and chronic stressors, and underwent 24-h ambulatory ECG monitoring...
May 2016: Stress: the International Journal on the Biology of Stress
Berkay Ekici, Aslı Tanındı, Gamze Ekici, Erdem Diker
OBJECTIVE: This study aimed to estimate the influence of the duration of mobile phone use on heart rate variability (HRV) in healthy individuals. METHODS: One hundred forty-eight individuals without any established systemic disease and who had undergone 24-h ambulatory ECG monitoring were included in the case-control study. All the individuals had been using mobile phones for more than 10 years. Three-channel 24-h Holter monitoring was performed to derive the mean heart rate, standard deviation of normal NN intervals (SDNN), standard deviation of 5-min (m) mean NN intervals (SDANN), the proportion of NN50 divided by the total number of NNs (pNN50), the root mean square differences of successive NN intervals (RMSSD), high (HF)-, low (LF)-, very low (VLF)-frequency power, total power components, and the LF/HF ratio...
April 7, 2016: Anatolian Journal of Cardiology
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