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ambulatory ECG monitoring

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https://www.readbyqxmd.com/read/29110996/atrial-ectopy-as-a-mediator-of-the-association-between-race-and-atrial-fibrillation
#1
Matthew A Christensen, Kaylin T Nguyen, Phyllis K Stein, Raymond B Fohtung, Elsayed Z Soliman, Thomas A Dewland, Eric Vittinghoff, Bruce M Psaty, Susan R Heckbert, Gregory M Marcus
BACKGROUND: Blacks have a lower risk of atrial fibrillation (AF) despite having more AF risk factors, but the mechanism remains unknown. Premature atrial contraction (PAC) burden is a recently identified risk factor for AF. OBJECTIVE: The purpose of this study was to determine whether the burden of PACs explains racial differences in AF risk. METHODS: PAC burden (number per hour) was assessed by 24-hour ambulatory electrocardiographic (ECG) monitoring in a randomly selected subset of patients in the Cardiovascular Health Study...
October 23, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/29073767/arterial-stiffness-is-associated-with-qtc-interval-prolongation-in-patients-with-heart-failure
#2
Salah Al-Zaiti, Samir Saba, Rodolfo Pike, Jennifer Williams, Fadi Khraim
BACKGROUND: A prolonged corrected QT (QTc) interval is a known risk factor for adverse cardiac events. Understanding the determinants and physiologic correlates of QTc is necessary for selecting proper strategies to reduce the risk of adverse events in high-risk patients. We sought to evaluate the role of arterial stiffness in heart failure as a determinant of QTc prolongation. METHOD: This was an observational study that recruited ambulatory heart failure patients (New York Heart Association Classes I-II) from an outpatient heart failure clinic...
January 1, 2017: Biological Research for Nursing
https://www.readbyqxmd.com/read/29064614/accuracy-of-the-pacemaker-event-recorder-versus-holter-ecg-to-detect-both-symptomatic-and-asymptomatic-ventricular-arrhythmias
#3
Stela Maria Vitorino Sampaio, Neyle Moara Craveiro, Francisco Darrieux, Ítalo Martins de Oliveira, Mauricio Scanavacca, Denise Hachul
Although new pacemakers can register cardiac rhythm, few studies were performed evaluating their accuracy in diagnosing ventricular arrhythmias (VA). This study aimed to assess the correlation and agreement between the pacemaker's monitor and the ambulatory Holter in detecting VA. METHODS/RESULTS: We studied 129 patients with pacemakers, mean age 68.6±19.1 years, 54.8% female. Once Holter monitoring was connected, the pacemakers' event counters were reset and clocks of both systems were synchronized to register ECG simultaneously...
October 24, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/29060518/significance-of-modified-empirical-mode-decomposition-for-ecg-denoising
#4
Pratik Singh, S Shahnawazuddin, Gayadhar Pradhan
The primary objective of the presented work is to exploit the power of modified empirical mode decomposition (M-EMD) for the denoising of ECG signals. It is well known that the ECG signals get corrupted by a number of noises during the recording process. Especially, during wireless ECG recording and ambulatory patient monitoring, the signal gets corrupted by additive white Gaussian noise (AWGN). Over the years, several techniques have been proposed for ECG denoising. Among those, empirical mode decomposition (EMD) and nonlocal means (NLM) algorithm are noted to be quite effective...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29060300/exploration-and-validation-of-alternate-sensing-methods-for-wearable-continuous-pulse-transit-time-measurement-using-optical-and-bioimpedance-modalities
#5
Bassem Ibrahim, Viswam Nathan, Roozbeh Jafari
In this work we explore the viability of a multimodal sensing device that can be integrated in a wearable form factor for daily, non-invasive ambulatory blood pressure (BP) monitoring. A common approach in previous research has been to rely on measuring the pulse transit time (PTT), which has been shown to be correlated with the BP. In this work, we look into the feasibility of measuring PTT using sensors separated by a small distance on one arm so that any eventual realization of the system is convenient to wear and use over long periods of time...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29055746/atrial-fibrillation-and-arterial-hypertension
#6
REVIEW
M S Kallistratos, L E Poulimenos, A J Manolis
Atrial fibrillation (AF) and arterial hypertension frequently coexist, not only because arterial hypertension increases the incidence of new onset of atrial fibrillation, but also because those two entities share common risk factors and conditions that increase the incidence of both. Thus, in our daily clinical practice we will often have to manage and treat those patients. In order to assess and treat these patients, proper blood pressure (BP) measurement as well as detection of atrial fibrillation is mandatory...
October 18, 2017: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
https://www.readbyqxmd.com/read/29031213/impairment-of-heart-rhythm-complexity-in-patients-with-drug-resistant-epilepsy-an-assessment-with-multiscale-entropy-analysis
#7
Hongyun Liu, Zhao Yang, Fangang Meng, Yuguang Guan, Yanshan Ma, Shuli Liang, Jiuluan Lin, Longsheng Pan, Mingming Zhao, Wei Qu, Hongwei Hao, Guoming Luan, Jianguo Zhang, Luming Li
OBJECTIVE: Epilepsy and seizures can have dramatic effects on the cardiac function. The aim of this study was to investigate the heart rhythm complexity in patients with drug-resistant epilepsy (DRE). METHODS: Ambulatory 24-h electrocardiograms (ECG) from 70 DRE patients and 50 healthy control subjects were analyzed using conventional heart rate variability (HRV) and multiscale entropy (MSE) methods The variation of complexity indices (CI), which was calculated from MSE profile, was determined...
October 5, 2017: Epilepsy Research
https://www.readbyqxmd.com/read/28992907/scaling-relationships-among-heart-rate-electrocardiography-parameters-and-body-weight
#8
Amanda Sarita Cruz Aleixo, Angélica Alfonso, Eunice Oba, Fabiana Ferreira de Souza, Raíssa Karolliny Salgueiro Cruz, Maurício Gianfrancesco Fillippi, Simone Biagio Chiacchio, Miriam Tsunemi, Maria Lucia Gomes Lourenço
Although heart rate (HR) is one of the most important clinical parameters determined via physical examinations, little information is available on the normal HR in dogs, which may be related to the high variability of body weight (BW) in this species. HR is determined by the discharge rate of the sinus node, which is dependent on the autonomic nervous system and the release of catecholamines. The allometric relationship between BW and HR in different species has been described as inversely proportional; however, this relationship has been refuted...
June 2017: Topics in Companion Animal Medicine
https://www.readbyqxmd.com/read/28985271/ecg-voltage-in-relation-to-peripheral-and-central-ambulatory-blood-pressure
#9
Wen-Yi Yang, Blerim Mujaj, Ljupcho Efremov, Zhen-Yu Zhang, Lutgarde Thijs, Fang-Fei Wei, Qi-Fang Huang, Aernout Luttun, Peter Verhamme, Tim S Nawrot, José Boggia, Jan A Staessen
BACKGROUND: The heart ejects in the central elastic arteries. No previous study in workers described the diurnal profile of central blood pressure (BP) or addressed the question whether ECG indexes are more closely associated with central than peripheral BP. METHODS: In 177 men (mean age, 29.1 years), we compared the associations of ECG indexes with brachial and central ambulatory BP, measured over 24 hours by the validated oscillometric Mobil-O-Graph 24h PWA monitor...
September 9, 2017: American Journal of Hypertension
https://www.readbyqxmd.com/read/28934961/area-asymmetry-of-heart-rate-variability-signal
#10
Chang Yan, Peng Li, Lizhen Ji, Lianke Yao, Chandan Karmakar, Changchun Liu
BACKGROUND: Heart rate fluctuates beat-by-beat asymmetrically which is known as heart rate asymmetry (HRA). It is challenging to assess HRA robustly based on short-term heartbeat interval series. METHOD: An area index (AI) was developed that combines the distance and phase angle information of points in the Poincaré plot. To test its performance, the AI was used to classify subjects with: (i) arrhythmia, and (ii) congestive heart failure, from the corresponding healthy controls...
September 21, 2017: Biomedical Engineering Online
https://www.readbyqxmd.com/read/28928046/new-directions-for-ambulatory-monitoring-following-2017-hrs-ishne-expert-consensus
#11
Emanuela T Locati
The main role of ambulatory electrocardiography (AECG) in clinical practice is to detect and characterize the behavior of cardiac electrical activity during ordinary daily life activities. Because certain rhythm abnormalities may be infrequent and paroxysmal, and may occur only during sleep or in association with mental, emotional, or exercise-induced perturbation in cardiac function, AECG needs to be recorded over a long period of time, originally lasting 24h and now expanding up to several weeks and even to months...
August 12, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28918212/an-%C3%AE-glucosidase-inhibitor-could-reduce-t-wave-alternans-in-type-2-diabetes-patients
#12
Kazuo Eguchi, Takahiro Komori, Toshinobu Saito, Satoshi Hoshide, Kazuomi Kario
BACKGROUND: We tested the hypothesis that an alpha-glucosidase inhibitor (α-GI), miglitol, is effective in protecting the cardiovascular system in type 2 diabetes mellitus (T2DM). METHODS: We studied 19 hospitalized heart disease patients with T2DM in whom we performed continuous glucose monitoring, Holter electrocardiogram, and ambulatory blood pressure (BP) monitoring simultaneously for 48h. The α-GI miglitol was administered for half of the study period by a cross-over fashion...
August 15, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28851729/assessment-of-remote-heart-rhythm-sampling-using-the-alivecor-heart-monitor-to-screen-for-atrial-fibrillation-the-rehearse-af-study
#13
RANDOMIZED CONTROLLED TRIAL
Julian P J Halcox, Kathie Wareham, Antonia Cardew, Mark Gilmore, James P Barry, Ceri Phillips, Michael B Gravenor
BACKGROUND: Asymptomatic atrial fibrillation (AF) is increasingly common in the aging population and implicated in many ischemic strokes. Earlier identification of AF with appropriate anticoagulation may decrease stroke morbidity and mortality. METHODS: We conducted a randomized controlled trial of AF screening using an AliveCor Kardia monitor attached to a WiFi-enabled iPod to obtain ECGs (iECGs) in ambulatory patients. Patients ≥65 years of age with a CHADS-VASc score ≥2 free from AF were randomized to the iECG arm or routine care (RC)...
November 7, 2017: Circulation
https://www.readbyqxmd.com/read/28795655/the-use-of-heart-rate-turbulence-and-heart-rate-variability-in-the-assessment-of-autonomic-regulation-and-circadian-rhythm-in-patients-with-systemic-lupus-erythematosus-without-apparent-heart-disease
#14
A R Poliwczak, E Waszczykowska, B Dziankowska-Bartkowiak, M Koziróg, K Dworniak
Background Systemic lupus erythematosus is a progressive autoimmune disease. There are reports suggesting that patients even without overt signs of cardiovascular complications have impaired autonomic function. The aim of this study was to assess autonomic function using heart rate turbulence and heart rate variability parameters indicated in 24-hour ECG Holter monitoring. Methods Twenty-six women with systemic lupus erythematosus and 30 healthy women were included. Twenty-four hour ambulatory ECG-Holter was performed in home conditions...
January 1, 2017: Lupus
https://www.readbyqxmd.com/read/28744977/supraventricular-premature-beats-and-risk-of-new-onset-atrial-fibrillation-in-coronary-artery-disease
#15
Santeri Nortamo, Tuomas V Kenttä, Olavi Ukkola, Heikki V Huikuri, Juha S Perkiömäki
INTRODUCTION: The significance of premature atrial contraction (PAC) count and supraventricular runs (SVR) for the risk of development of new-onset atrial fibrillation (AF) in patients with coronary artery disease (CAD) is not well established. METHODS: The Innovation to Reduce Cardiovascular Complications of Diabetes at the Intersection (ARTEMIS) study cohort consisted of 1,946 patients with CAD who underwent clinical and echocardiographic examinations, 24-hour ambulatory ECG monitoring, and laboratory tests...
November 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/28684376/the-association-between-arterial-stiffness-initial-stroke-severity-and-3-week-outcomes-in-patients-with-ischemic-stroke
#16
Emma Ormerod, Khalid Ali, James Cameron, Muzaffar Malik, Richard Lee, Spas Getov, Chakravarthi Rajkumar
OBJECTIVES: Vascular compliance is emerging as a useful cardiovascular risk factor. The aim of this study was to investigate the association between arterial stiffness and stroke severity at presentation and 3 weeks. METHODS: Forty two patients with acute ischemic stroke (55% male, mean age 71 years) were recruited over 15-months. Stroke subtypes were classified into lacunar circulation infarct (LACI), partial anterior circulation infarct (PACI), and posterior circulation infarct (POCI)...
November 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/28668444/the-effect-of-circadian-blood-pressure-pattern-on-presence-of-fragmented-qrs-complexes-in-hypertensive-subjects
#17
Mehmet Eyuboglu, Yavuz Karabag, Suleyman Karakoyun, Bahri Akdeniz
The association of deteriorated circadian blood pressure (BP) variability with presence of fragmented QRS (fQRS) on electrocardiography (ECG) is not clear. The present study aims to evaluate the relationship of BP patterns with presence of fQRS on ECG. A total of 338 consecutive newly diagnosed and never treated hypertensive patients who are without left ventricular hypertrophy and underwent 24-hour ambulatory BP monitoring were enrolled. Patients were classified as dippers, nondippers, and reverse dippers according to ambulatory BP monitoring results...
June 12, 2017: Journal of the American Society of Hypertension: JASH
https://www.readbyqxmd.com/read/28610987/tracking-interlead-heterogeneity-of-r-and-t-wave-morphology-to-disclose-latent-risk-for-sudden-cardiac-death
#18
Richard L Verrier, Heikki Huikuri
Sudden cardiac death (SCD) due primarily to ventricular fibrillation claims 1.5 million lives worldwide each year. In 45%-50% of cases, it is the first manifestation of underlying heart disease. Traditional risk factors including smoking, hypertension, age, sex, as well as depressed left ventricular ejection fraction lack sufficient sensitivity and specificity to forewarn of impending life-threatening arrhythmias. There has been a decades-long search for electrocardiographic (ECG) markers of SCD risk. Several interval-based indices such as QT dispersion and Tpeak-Tend interval held initial promise but ultimately yielded mixed results...
October 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/28600268/slow-wave-sleep-estimation-for-healthy-subjects-and-osa-patients-using-r-r-intervals
#19
Hee Nam Yoon, Su Hwan Hwang, Jae Won Choi, Yu Jin Lee, Do Un Jeong, Kwang Suk Park
We developed an automatic slow-wave sleep (SWS) detection algorithm that can be applied to groups of healthy subjects and patients with obstructive sleep apnea (OSA). This algorithm detected SWS based on autonomic activations derived from the heart rate variations of a single sensor. An autonomic stability, which is an SWS characteristic, was evaluated and quantified using R-R intervals from an electrocardiogram (ECG). The thresholds and the heuristic rule to determine SWS were designed based on the physiological backgrounds for sleep process and distribution across the night...
June 7, 2017: IEEE Journal of Biomedical and Health Informatics
https://www.readbyqxmd.com/read/28576855/sodium-balance-circadian-bp-rhythm-heart-rate-variability-and-intrarenal-renin-angiotensin-aldosterone-and-dopaminergic-systems-in-acute-phase-of-arb-therapy
#20
Yukako Isobe-Sasaki, Michio Fukuda, Yoshiaki Ogiyama, Ryo Sato, Toshiyuki Miura, Daisuke Fuwa, Masashi Mizuno, Tetsuhei Matsuoka, Hiroko Shibata, Hiroyuki Ito, Minamo Ono, Sumiko Abe-Dohmae, Ken Kiyono, Yoshiharu Yamamoto, Hiroyuki Kobori, Makoto Michikawa, Junichiro Hayano, Nobuyuki Ohte
We have revealed that even in humans, activated intrarenal renin-angiotensin-aldosterone system (RAAS) enhances tubular sodium reabsorption to facilitate salt sensitivity and nondipper rhythm of blood pressure (BP), and that angiotensin receptor blocker (ARB) could increase daytime urinary sodium excretion rate (UNaV) to produce lower sodium balance and restore nondipper rhythm. However, the sympathetic nervous system and intrarenal dopaminergic system can also contribute to renal sodium handling. A total of 20 patients with chronic kidney disease (61 ± 15 years) underwent 24-h ambulatory BP monitoring before and during two-day treatment with ARB, azilsartan...
June 2017: Physiological Reports
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