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Electrocardiography

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https://www.readbyqxmd.com/read/28737245/exteroceptive-stimuli-override-interoceptive-state-in-reaction-time-control
#1
Xiao Yang, J Richard Jennings, Bruce H Friedman
The processing of reaction time (RT) stimulus is modulated by its timing relative to the cardiac cycle. RT stimulus processing is also influenced by task-irrelevant stimuli: a sensory stimulus speeds RT when it accompanies a cue to react in another sensory modality. Different theories have been proposed to explain this accessory stimulus effect (ASE). However, it is unclear whether the ASE interacts with the cardiac timing effect. In the present study, the relationship of the ASE, cardiac timing, and stimulus valence was examined...
July 24, 2017: Psychophysiology
https://www.readbyqxmd.com/read/28736443/clock-3111t-c-genetic-variant-influences-the-daily-rhythm-of-autonomic-nervous-function-relevance-to-body-weight-control
#2
M-T Lo, C Bandin, H-W Yang, F A J L Scheer, K Hu, M Garaulet
BACKGROUND/OBJECTIVES: Humans carrying the genetic risk variant C at the circadian CLOCK (Circadian Locomotor Output Cycles Kaput) 3111T/C have been shown to have more difficulties to achieve desired weight loss than TT carriers. We tested the hypothesis that the daily rhythm of autonomic nervous function differs in CLOCK 3111C carriers, leading to reduced effectiveness in weight control. SUBJECTS/METHODS: We recruited 40 overweight/obese Caucasian women (BMI>25), 20 carrying CLOCK 3111C (CC and TC) and 20 non-carriers with matched age and BMI who participated in a dietary obesity treatment program of up to 30 weeks...
July 24, 2017: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/28734885/clinical-impact-of-baseline-right-bundle-branch-block-in-patients-undergoing-transcatheter-aortic-valve-replacement
#3
Vincent Auffret, John G Webb, Hélène Eltchaninoff, Antonio J Muñoz-García, Dominique Himbert, Corrado Tamburino, Luis Nombela-Franco, Fabian Nietlispach, César Morís, Marc Ruel, Antonio E Dager, Vicenç Serra, Asim N Cheema, Ignacio J Amat-Santos, Fábio Sandoli de Brito, Pedro Alves Lemos, Alexandre Abizaid, Rogério Sarmento-Leite, Eric Dumont, Marco Barbanti, Eric Durand, Juan H Alonso Briales, Alec Vahanian, Claire Bouleti, Sebastiano Immè, Francesco Maisano, Raquel Del Valle, Luis Miguel Benitez, Bruno García Del Blanco, Rishi Puri, François Philippon, Marina Urena, Josep Rodés-Cabau
OBJECTIVES: This study sought to assess the influence of baseline right bundle branch block (RBBB) on all-cause and cardiovascular mortality as well as sudden cardiac death (SCD) among patients undergoing transcatheter aortic valve replacement (TAVR). BACKGROUND: Few data exist regarding the late clinical impact of pre-existing RBBB in TAVR recipients. METHODS: A total of 3,527 patients (mean age 82 ± 8 years, 50.1% men) were evaluated according to the presence of RBBB on baseline electrocardiography...
July 13, 2017: JACC. Cardiovascular Interventions
https://www.readbyqxmd.com/read/28733087/unobtrusive-assessment-of-neonatal-sleep-state-based-on-heart-rate-variability-retrieved-from-electrocardiography-used-for-regular-patient-monitoring
#4
Jan Werth, Xi Long, Elly Zwartkruis-Pelgrim, Hendrik Niemarkt, Wei Chen, Ronald M Aarts, Peter Andriessen
As an approach of unobtrusive assessment of neonatal sleep state we aimed at an automated sleep state coding based only on heart rate variability obtained from electrocardiography used for regular patient monitoring. We analyzed active and quiet sleep states of preterm infants between 30 and 37weeks postmenstrual age. To determine the sleep states we used a nonlinear kernel support vector machine for sleep state separation based on known heart rate variability features. We used unweighted and weighted misclassification penalties for the imbalanced distribution between sleep states...
July 18, 2017: Early Human Development
https://www.readbyqxmd.com/read/28728608/influence-of-apelin-12-on-troponin-levels-and-the-rate-of-mace-in-stemi-patients
#5
Xhevdet Krasniqi, Blerim Berisha, Masar Gashi, Dardan Koçinaj, Fisnik Jashari, Josip Vincelj
BACKGROUND: During acute myocardial infarction, phosphorylated TnI levels, Ca(2+) sensitivity and ATPase activity are decreased in the myocardium, and the subsequent elevation in Ca(2+) levels activates protease I (caplain I), leading to the proteolytic degradation of troponins. Concurrently, the levels of apelin and APJ expression are increased by limiting myocardial injury. METHODS: In this prospective observational study, 100 consecutive patients with ST-elevation acute myocardial infarction were included...
July 20, 2017: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/28721696/usefulness-of-fragmented-qrs-in-hypertensive-patients-in-the-absence-of-left-ventricular-hypertrophy
#6
Mehmet Eyuboglu, Yavuz Karabag, Suleyman Karakoyun, Omer Senarslan, Zulkif Tanriverdi, Bahri Akdeniz
In the absence of left ventricular hypertrophy, importance of fragmented QRS complex (fQRS) in individuals with hypertension is unknown. The authors aimed to evaluate the relationship between blood pressure levels and fQRS in the absence of left ventricular hypertrophy. A total of 548 never-treated patients who underwent 24-hour ambulatory blood pressure monitoring were enrolled. The frequency of fQRS was significantly higher in patients with hypertension than normotension (36.4% vs 17.6%, P<.05). Multivariate logistic regression analysis revealed that systolic blood pressure is significantly associated with presence of fQRS on electrocardiography (odds ratio, 0...
July 18, 2017: Journal of Clinical Hypertension
https://www.readbyqxmd.com/read/28714587/stretchable-dry-electrodes-with-concentric-ring-geometry-for-enhancing-spatial-resolution-in-electrophysiology
#7
Kaiping Wang, Udit Parekh, Tejaswy Pailla, Harinath Garudadri, Vikash Gilja, Tse Nga Ng
The multichannel concentric-ring electrodes are stencil printed on stretchable elastomers modified to improve adhesion to skin and minimize motion artifacts for electrophysiological recordings of electroencephalography, electromyography, and electrocardiography. These dry electrodes with a poly(3,4-ethylenedioxythiophene) polystyrene sulfonate interface layer are optimized to show lower noise level than that of commercial gel disc electrodes. The concentric ring geometry enables Laplacian filtering to pinpoint the bioelectric potential source with spatial resolution determined by the ring distance...
July 17, 2017: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/28712169/analytic-study-in-patients-presenting-to-a-tertiary-care-hospital-regarding-the-artemether-lumefantrine-induced-qtc-interval-changes-in-ecg
#8
Aliena Badshah, Iqbal Haider, Shams Suleman
BACKGROUND: Malaria is one of the most common causes of morbidity and mortality in our part of the world. Artemether-Lumefantrine (AL) Combination therapy is widely used for the treatment of malaria both in outpatients and inpatients hospital settings. Some of the previous anti-malarial were associated with prolongation of QTc interval. Similar query was raised about AL therapy. This study was conducted to determine the risk of QTc interval prolongation in ECG of patients with Falciparum malaria using oral Artemether-Lumefantrine (AL) combination therapy...
January 2017: Journal of Ayub Medical College, Abbottabad: JAMC
https://www.readbyqxmd.com/read/28711570/anesthetic-management-of-reversible-cerebral-vasoconstriction-syndrome-a-case-report
#9
Hiroshi Hoshijima, Naoki Itoh, Yoshinori Iwase, Hiroshi Nagasaka
Reversible cerebral vasoconstriction syndrome (RCVS) is a group of disorders characterized by prolonged reversible cerebral vasoconstriction, associated with acute-onset, severe, episodic "thunderclap" headaches with or without other neurologic clinical features. We describe the first reported case, to our knowledge, of a patient with RCVS who was managed under general anesthesia in the field of oral and maxillofacial surgery. A 67-year-old woman with a diagnosis of RCVS made 2 months earlier was scheduled to undergo surgical extraction of the mandibular right third molar...
June 14, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28709467/amitriptyline-induced-ventricular-tachycardia-a-case-report
#10
Khandker Mohammad Nurus Sabah, Abdul Wadud Chowdhury, Mohammad Shahidul Islam, Bishnu Pada Saha, Syed Rezwan Kabir, Shamima Kawser
BACKGROUND: In Bangladesh, each emergency physician faces amitriptyline overdose nearly a day. An acute cardiovascular complication, one of the worst complications is mainly responsible for the mortality in tricyclic overdose. Recently, we managed ventricular tachycardia in a young female presented with an impaired consciousness 10 h after intentionally ingesting 2500 mg amitriptyline. Here, we report it, discuss how the electrocardiography is vital to acknowledge and predict it and its' complications and also the recent update of the management of it...
July 14, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28708775/continuous-cardiac-autonomic-and-hemodynamic-responses-to-isometric-exercise
#11
Katrina A Taylor, Jonathan D Wiles, Damian D Coleman, Rajan Sharma, Jamie M Oʼdriscoll
PURPOSE: Elevated arterial blood pressure (BP) is associated with autonomic dysfunction and impaired hemodynamic control mechanisms. Isometric exercise (IE) training has been demonstrated effective at reducing BP; however, the continuous cardiovascular responses during IE are underinvestigated. We hypothesized that reflex autonomic cardiovascular control is an important mediator in reducing BP. To test our hypothesis, we investigated continuous cardiac autonomic modulation and baroreceptor reflex sensitivity (BRS) in response to IE...
August 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28708724/impact-of-ssf-on-diagnostic-performance-of-coronary-computed-tomography-angiography-within-1-heart-beat-in-patients-with-high-heart-rate-using-a-256-row-detector-computed-tomography
#12
Junfu Liang, Hui Wang, Lei Xu, Li Dong, Zhanming Fan, Rui Wang, Zhonghua Sun
OBJECTIVE: The aim of this study was to investigate the impact of a motion-correction algorithm on diagnostic accuracy of coronary computed tomography angiography (CCTA) within 1 heart beat in patients with high heart rate (HR) using a 256-row detector CT. METHOD: Sixty-four consecutive patients with known or suspected coronary artery disease (symptomatic) and with HR of 75 beats per minute or greater (mean [SD] HR, 82.6 [7.3] beats per minute) undergoing CCTA and invasive coronary angiography within 4 weeks were prospectively enrolled...
July 13, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28708472/rectal-instillation-of-cold-fluids-for-targeted-temperature-management-after-cardiac-arrest-a-case-report
#13
Andrej Markota, Jure Fluher, Andreja Sinkovič
The optimal method of temperature management after cardiac arrest remains unknown. Methods that are most effective are usually invasive and expensive. Noninvasive methods are not as effective and obstruct access to the patient. Temperature management via rectal cooling offers some potential advantages in survivors of cardiac arrest, namely, relatively large volumes of temperature-controlled fluids can be instilled, access to the patient is not obstructed, and fluid overload can be ameliorated by removal of a fraction of instilled fluid...
July 14, 2017: Therapeutic Hypothermia and Temperature Management
https://www.readbyqxmd.com/read/28707558/effect-of-unconjugated-hyperbilirubinemia-on-neonatal-autonomic-functions-evaluation-by-heart-rate-variability
#14
Rahmi Ozdemir, Ozgur Olukman, Cem Karadeniz, Kiymet Celik, Nagehan Katipoglu, Murat Muhtar Yilmazer, Sebnem Calkavur, Timur Mese, Sertac Arslanoglu
BACKGROUND: Beyond the physiological levels of bilirubin may leads to alterations in autonomic regulation. Heart rate variability (HRV), is a noninvasive and quantitative marker of the activity of the autonomic nervous system (ANS). To date, few studies have been evaluated the undesirable effects of severe unconjugated hyperbilirubinemia (UHB) on autonomic functions, and only one study has used HRV as a marker of the autonomic activity. However, the relationship between altered cardiac autonomic functions and UHB by using the HRV derived from 24-hour Holter electrocardiography (ECG) recording previously...
July 14, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28705994/wearable-brain-imaging-with-multi-modal-physiological-recording
#15
Gary E Strangman, Vladimir Ivkovic, Quan Zhang
The brain is a central component of cognitive and physical human performance. Measures including functional brain activation, cerebral perfusion, cerebral oxygenation, evoked electrical responses, and resting hemodynamic and electrical activity are all related to, or can predict health status or performance decrements. However, measuring brain physiology typically requires large, stationary machines that are not suitable for mobile or self-monitoring. Moreover, when individuals are ambulatory, systemic physiological fluctuations-e...
July 13, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28703104/high-pitch-dual-source-ct-angiography-without-ecg-gating-for-imaging-the-whole-aorta-intraindividual-comparison-with-standard-pitch-single-source-technique-without-ecg-gating
#16
Carmelinda Manna, Mario Silva, Rocco Cobelli, Sara Poggesi, Cristina Rossi, Nicola Sverzellati
PURPOSE: We aimed to perform intraindividual comparison of computed tomography (CT) parameters, image quality, and radiation exposure between standard CT angiography (CTA) and high-pitch dual source (DS)-CTA, in subjects undergoing serial CTA of thoracoabdominal aorta. METHODS: Eighteen subjects with thoracoabdominal CTA by standard technique and high-pitch DS-CTA technique within 6 months of each other were retrieved for intraindividual comparison of image quality in thoracic and abdominal aorta...
July 2017: Diagnostic and Interventional Radiology: Official Journal of the Turkish Society of Radiology
https://www.readbyqxmd.com/read/28699262/recurrent-myocardial-infarction-in-a-47-year-old-woman-with-a-mechanical-mitral-valve-prosthesis-atherosclerosis-embolism-or-spasm
#17
Bimmer E Claessen, Thomas P W van den Boogert, Jan J Piek
We present a case of a 47-year-old woman with a mechanical mitral valve prosthesis and recurrent myocardial infarction. The most common etiology of spontaneous myocardial infarction is an acute coronary syndrome caused by rupture or erosion of an atherosclerotic plaque. However, the differential diagnosis in the patient described below also included infarction due to embolization or coronary spasm. It can be challenging to discriminate between the different causes of myocardial infarction based on interpretation of symptoms, physical examination, laboratory tests, and electrocardiography alone...
July 12, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/28695548/design-of-the-swiss-atrial-fibrillation-cohort-study-swiss-af-structural-brain-damage-and-cognitive-decline-among-patients-with-atrial-fibrillation
#18
David Conen, Nicolas Rodondi, Andreas Mueller, Juerg Beer, Angelo Auricchio, Peter Ammann, Daniel Hayoz, Richard Kobza, Giorgio Moschovitis, Dipen Shah, Juerg Schlaepfer, Jan Novak, Marcello di Valentino, Paul Erne, Christian Sticherling, Leo Bonati, Georg Ehret, Laurent Roten, Urs Fischer, Andreas Monsch, Christoph Stippich, Jens Wuerfel, Matthias Schwenkglenks, Michael Kuehne, Stefan Osswald
BACKGROUND: Several studies found that patients with atrial fibrillation (AF) have an increased risk of cognitive decline and dementia over time. However, the magnitude of the problem, associated risk factors and underlying mechanisms remain unclear. METHODS: This article describes the design and methodology of the Swiss Atrial Fibrillation (Swiss-AF) Cohort Study, a prospective multicentre national cohort study of 2400 patients across 13 sites in Switzerland. Eligible patients must have documented AF...
July 11, 2017: Swiss Medical Weekly
https://www.readbyqxmd.com/read/28694782/evaluation-of-abdominal-fetal-electrocardiography-in-early-intrauterine-growth-restriction
#19
Clarissa L Velayo, Kiyoe Funamoto, Joyceline Noemi I Silao, Yoshitaka Kimura, Kypros Nicolaides
Objectives: This descriptive study was performed to evaluate the capability of a non-invasive transabdominal electrocardiographic system to extract clear fetal electrocardiographic (FECG) measurements from intrauterine growth restricted (IUGR) fetuses and to assess whether abdominal FECG parameters can be developed as markers for evaluating the fetal cardiac status in IUGR. Methods: Transabdominal FECG was attempted in 20 controls and 15 IUGR singleton pregnancies at 20+0-33+6 weeks gestation. Standard ECG parameters were compared between the study groups and evaluated for their correlation...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28689328/image-quality-of-coronary-arteries-on-non-electrocardiography-gated-high-pitch-dual-source-computed-tomography-in-children-with-congenital-heart-disease
#20
Yuichiro Kanie, Shuhei Sato, Akihiro Tada, Susumu Kanazawa
This study aimed to evaluate image quality of coronary artery imaging on non-electrocardiography (ECG)-gated high-pitch dual-source computed tomography (DSCT) in children with congenital heart disease (CHD) and to assess factors affecting image quality. We retrospectively reviewed the records of 142 children with CHD who underwent non-ECG-gated high-pitch DSCT. The subjective image quality of the proximal coronary segments was graded using a five-point scale. A score <3 represented a non-diagnostic image...
July 8, 2017: Pediatric Cardiology
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