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https://www.readbyqxmd.com/read/28431059/cardiac-structural-and-functional-profile-of-patients-with-delayed-qrs-transition-zone-and-sudden-cardiac-death
#1
Aapo L Aro, Derek Phan, Carmen Teodorescu, Audrey Uy-Evanado, Kyndaron Reinier, Karen Gunson, Jonathan Jui, Heikki V Huikuri, Sumeet S Chugh
Aims: Delayed QRS transition zone in the precordial leads of the 12-lead electrocardiogram (ECG) has been recently associated with increased risk of sudden cardiac death (SCD), but the underlying mechanisms are unknown. We correlated echocardiographic findings with ECG and clinical characteristics to investigate how alterations in cardiac structure and function contribute to this risk marker. Methods and Results: From the ongoing population-based Oregon Sudden Unexpected Death Study (catchment population ∼1 million), SCD cases with prior ECG available (n = 627) were compared with controls (n = 801)...
April 1, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28431057/quantitative-analysis-of-pkp2-and-neighbouring-genes-in-a-patient-with-arrhythmogenic-right-ventricular-cardiomyopathy-caused-by-heterozygous-pkp2-deletion
#2
Keiko Sonoda, Seiko Ohno, Sou Otuki, Koichi Kato, Nobue Yagihara, Hiroshi Watanabe, Takeru Makiyama, Tohru Minamino, Minoru Horie
Aims: Arrhythmogenic right ventricular cardiomyopathy (ARVC) is a disease mainly caused by desmosome gene mutations. The genetic culprit, however, remains elusive in ∼50% of ARVC patients. One of the reasons for missing genetic abnormalities is the difficulty in detecting large deletions/duplications, which are called as copy number variation (CNV) by the Sanger sequencing method. This study aimed to identify CNVs in PKP2 and a part of other desmosome genes in ARVC patients. Methods and Results: The study cohort consisted of 71 ARVC probands who were diagnosed as definite or borderline cases based on 2010 Task Force Criteria...
April 1, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28431054/the-variability-of-automated-qrs-duration-measurement
#3
Vlastimil Vancura, Dan Wichterle, Ivan Ulc, Jirí Šmíd, Marek Brabec, Marta Zárybnická, Richard Rokyta
Aims: Previous studies have demonstrated substantial variability in manual assessment of QRS complex duration (QRSd). Disagreements in QRSd measurements were also found in several automated algorithms tested on digitized electrocardiogram (ECG) recordings. The aim of our study was to investigate the variability of automated QRSd measurements performed by two commercially available electrocardiographs. Methods and Results: Two GE MAC 5000 (GE-1 and GE-2) electrocardiographs and two Mortara ELI 350 (Mortara-1 and Mortara-2) electrocardiographs were used in the study...
April 1, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28431053/occurrence-of-simultaneous-cathodal-anodal-capture-with-left-ventricular-quadripolar-leads-for-cardiac-resynchronization-therapy-an-electrocardiogram-evaluation
#4
Eraldo Occhetta, Gabriele Dell'Era, Ailia Giubertoni, Andrea Magnani, Francesco Rametta, Alessandro Blandino, Vincenzo Magnano, Maurizio Malacrida, Paolo Marino
Aims: The occurrence of left ventricular (LV) anodal activation during pacing with modern multipolar cardiac resynchronization therapy (CRT) systems has never been reported. The aim of our study was to demonstrate, by means of electrocardiogram (ECG) analysis, the occurrence of simultaneous cathodal-anodal LV capture with quadripolar LV leads. Methods and Results: We studied 10 first-time recipients of a CRT device equipped with a quadripolar LV lead. During follow-up, standard supine 12-lead ECGs were obtained in available cathode-to-anode LV pacing configurations with a pulse amplitude equal to twice the pacing threshold...
April 1, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28430109/acquisition-of-electrocardiogram-signals-during-magnetic-resonance-imaging
#5
Julien Oster, Gari Clifford
The recording of the electrocardiogram (ECG) during Magnetic Resonance Imaging (MRI) acquisition is of great interest and importance. Firstly, MRI acquisition is a relatively slow process, which therefore complicates the imaging of moving organs. Cardiac MRI requires the development of strategies for acquiring high quality images, which is mainly achieved by synchronising the image acquisition with a specific time during the cardiac cycle. The ECG is used to monitor the heart's activity, and the detection of the largest and steepest peak in the cardiac cycle (the QRS complex) triggers the acquisition of slices of the k-space...
April 21, 2017: Physiological Measurement
https://www.readbyqxmd.com/read/28429690/-our-experience-in-the-diagnosis-and-treatment-of-postural-orthostatic-tachycardia-syndrome-vasovagal-syncope-and-inappropriate-sinus-tachycardia-in-children
#6
Sezen Ugan Atik, Reyhan Dedeoğlu, Aida Koka, Funda Öztunç
OBJECTIVES: The aim of this study was to share our experience in the diagnosis and treatment of patients who presented at our clinic with syncope, pre-syncope, dizziness, and palpitations. STUDY DESIGN: Patients who were treated at pediatric cardiology clinic for complaints of syncope, dizziness, and palpitations between 2014 and 2016 were enrolled in the study. Detailed history of the patients, physical examination findings, laboratory and electrocardiogram results were recorded...
April 2017: Türk Kardiyoloji Derneği Arşivi: Türk Kardiyoloji Derneğinin Yayın Organıdır
https://www.readbyqxmd.com/read/28429689/relationship-between-fragmented-qrs-complexes-in-leads-v4-v6-and-left-ventricular-apical-thrombus-formation-in-patients-presenting-with-first-acute-anterior-myocardial-infarction
#7
Erkan Baysal, Cengiz Burak, Barış Yaylak, Bernas Altıntaş, Önder Öztürk, Hacı Çiftçi, Rojhat Altındağ, Serdar Söner
OBJECTIVE: The present study was an investigation of the relationship between fragmented QRS (fQRS) and left ventricular apical thrombus (LVAT) in patients presenting with first acute anterior myocardial infarction (MI). METHODS: Consecutive 148 patients (mean age: 60.1±10.1 years; male: 75.6%) with first acute anterior MI who underwent primary percutaneous coronary intervention (PCI) were included. Study population was divided into 2 groups based on presence of LVAT...
April 2017: Türk Kardiyoloji Derneği Arşivi: Türk Kardiyoloji Derneğinin Yayın Organıdır
https://www.readbyqxmd.com/read/28429678/intraperitoneal-administration-of-ethanol-as-a-means-of-euthanasia-for-neonatal-mice-mus-musculus
#8
Cecilia de Souza Dyer Angela K Brice And James O Marx
The humane euthanasia of animals in research is of paramount importance. Neonatal mice frequently respond differentlyto euthanasia agents when compared with adults. The AVMA's Guidelines for the Euthanasia of Animals includes intraperitonealinjection of ethanol as "acceptable with conditions," and recent work confirmed that this method is appropriate for euthanizing adult mice, but neonatal mice have not been tested. To explore this method in neonatal mice, mouse pups(C57BL/6 and CD1, 162 total) were injected with 100% ethanol, a pentobarbital-phenytoin combination, or saline at 7, 14, 21, 28, or 35 d of age...
April 20, 2017: Journal of the American Association for Laboratory Animal Science: JAALAS
https://www.readbyqxmd.com/read/28429500/electrocardiographic-appearance-of-aortic-stenosis-before-and-after-aortic-valve-replacement
#9
Ivana I Vranic
BACKGROUND: So far, the specific appearance of QRS complex, ST-segment, and T wave was observed in aortic stenosis (AS). S-wave dynamic change in leads V1 -V3 was not reported in AS. METHODS: In a single-center, prospective study, we included a total number of 1.175 patients who underwent surgical aortic valve replacement (AVR). We conducted 3-year gathering of patients with symptomatic and asymptomatic severe AS, and separated them by hemodynamic stability into groups A and B, through EFLV (of more or less than 50%), AVA (of more or less than 0...
April 21, 2017: Annals of Noninvasive Electrocardiology
https://www.readbyqxmd.com/read/28429460/automated-t-wave-analysis-can-differentiate-acquired-qt-prolongation-from-congenital-long-qt-syndrome
#10
Alan Sugrue, Peter A Noseworthy, Vaclav Kremen, J Martijn Bos, Bo Qiang, Ram K Rohatgi, Yehu Sapir, Zachi I Attia, Peter Brady, Pedro J Caraballo, Samuel J Asirvatham, Paul A Friedman, Michael J Ackerman
BACKGROUND: Prolongation of the QT on the surface electrocardiogram can be due to either genetic or acquired causes. Distinguishing congenital long QT syndrome (LQTS) from acquired QT prolongation has important prognostic and management implications. We aimed to investigate if quantitative T-wave analysis could provide a tool for the physician to differentiate between congenital and acquired QT prolongation. METHODS: Patients were identified through an institution-wide computer-based QT screening system which alerts the physician if the QTc ≥ 500 ms...
April 21, 2017: Annals of Noninvasive Electrocardiology
https://www.readbyqxmd.com/read/28428666/linear-short-term-heart-rate-variability-parameters-of-subjects-tobacco-cigarette-smokers-and-subjects-nonsmokers-in-preoperative-period
#11
Meldijana Omerbegovic
BACKGROUND: Variations of heart cycles reflect complex dynamic cardiocirculatory regulatory systems in humans. Exposure to tobacco from cigarettes has been shown to elicit specific alterations of heart rate variability parameters leading to predominance of sympathetic and decreasing parameters of parasympathetic measures of cardiac autonomic nervous system tone. AIM: The aim of the trial was assessing differences of linear parameters of heart rate variability in subjects with habit of consuming of cigarettes tobacco in regard to subjects who are not consumers of tobacco...
February 2017: Medical Archives
https://www.readbyqxmd.com/read/28428020/repeated-sub-chronic-oral-toxicity-study-of-xylooligosaccharides-xos-in-dogs
#12
Yonglin Gao, Yunzhi Wang, Yanshen Li, Rui Han, Chunmei Li, Lin Xiao, Susan Cho, Yukui Ma, Chao Fang, Albert W Lee
In this study, Beagle dogs were administered xylooligosaccharide (XOS, CAS # 87099-0) at doses of 0, 1250, 2500, and 5000 mg/kg/day by oral gavage for 26 weeks. A 4-week recovery period was added to observe delayed or reversible toxicity. Measurements included body weight, food consumption, clinical observations, temperature, electrocardiogram (ECG), urinalysis, blood chemistry, hematology, organ weight, gross necropsy, and histopathological examination. Except for transient diarrhea or vomiting, no treatment-related adverse effects were noted...
April 17, 2017: Regulatory Toxicology and Pharmacology: RTP
https://www.readbyqxmd.com/read/28427851/circulating-ceruloplasmin-ceruloplasmin-associated-genes-and-the-incidence-of-atrial-fibrillation-in-the-atherosclerosis-risk-in-communities-study
#13
Antonio P Arenas de Larriva, Faye L Norby, Lin Y Chen, Elsayed Z Soliman, Ron C Hoogeveen, Dan E Arking, Laura R Loehr, Alvaro Alonso
BACKGROUND: Ceruloplasmin (CP) may promote structural changes in the atrium making it more arrhythmogenic. We assessed the associations between CP, CP-associated genetic variants, and incident atrial fibrillation (AF) in the Atherosclerosis Risk in Communities (ARIC) study. METHODS AND RESULTS: We studied 10,059 men and women without prevalent AF aged 53 to 75years in 1996-1998 and followed through 2012. Circulating CP was measured in stored blood samples obtained in 1996-1998...
April 6, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28427736/interactions-between-reciprocal-st-segment-downsloping-during-st-elevated-myocardial-infarction-and-global-cardiac-perfusion-and-functional-abnormalities
#14
Riccardo Liga, Enrico Orsini, Paolo Caravelli, Marco De Carlo, Anna Sonia Petronio, Mario Marzilli
Reciprocal ST-segment downsloping on electrocardiogram is a frequent finding during ST-elevated myocardial infarction (STEMI), but its etiology is still disputed. We sought to evaluate the relation between reciprocal ST-segment downsloping during STEMI and major cardiac perfusion and functional parameters. One hundred eighty-five patients with STEMI underwent emergency coronary angiography. The presence of reciprocal ST-segment downsloping was assessed. At coronary angiography, the corrected TIMI frame count (cTFC) was computed both on culprit and remote vessels and the occurrence of "no/slow reflow" phenomenon after percutaneous coronary intervention (PCI) identified...
March 29, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/28427082/perioperative-outcomes-and-safety-of-atrial-fibrillation-catheter-ablation-in-octogenarians-a-retrospective-study-and-review-of-the-benefits-of-rhythm-control
#15
Stephanie Hakimian, Juan C Camacho, Edwin Grajeda Silvestri, Farid AbdelMalak, Elie Donath, Robert Chait
OBJECTIVES: Catheter ablation for rhythm control has emerged as a successful therapeutic option for the treatment of atrial fibrillation (AF), though it has not been well studied in octogenarians. This study evaluates its safety in octogenarians in a community hospital and reviews the benefits of rhythm control. METHODS: Among 1,592 patients undergoing AF ablation, 84 octogenarian were identified. The primary outcome was normal sinus rhythm (NSR) on electrocardiogram at discharge...
April 21, 2017: Cardiology
https://www.readbyqxmd.com/read/28424890/left-atrial-electromechanical-conduction-time-predicts-atrial-fibrillation-in-patients-with-mitral-stenosis-a-5-year-follow-up-speckle-tracking-echocardiography-study
#16
Ozkan Candan, Cetin Gecmen, Arzu Kalayci, Cem Dogan, Emrah Bayam, Mehmet Ozkan
Prolonged left atrial electromechanical conduction time is related with atrial electrical remodeling, and is predictive of the development of atrial fibrillation. The aim of our study was to examine whether left atrial electromechanical conduction time (EMT) and left atrial strain as measured by speckle tracking echocardiography (STE) are predictors for the development of atrial fibrillation (AF) in patients with mitral stenosis (MS) at 5-year follow-up. A total of 81 patients (61% females; mean age 38.1 ± 12...
April 19, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28421305/the-utility-of-global-longitudinal-strain-in-the-identification-of-prior-myocardial-infarction-in-patients-with-preserved-left-ventricular-ejection-fraction
#17
Graham J Fent, Pankaj Garg, James R J Foley, Laura E Dobson, Tarique A Musa, Bara Erhayiem, John P Greenwood, Sven Plein, Peter P Swoboda
Prior myocardial infarction (MI) is associated with increased mortality and is prevalent in certain high risk patient groups. Electrocardiogram may be used in diagnosis, however, sensitivity is limited, thus non-invasive imaging techniques may improve diagnosis. We investigated whether global longitudinal strain (GLS) and longitudinal strain parameters are reduced in patients with prior MI but preserved left ventricular ejection fraction (LVEF). The study included 40 clinical patients with prior MI occurring >3 months previously (defined as subendocardial hyperenhancement on late Gadolinium enhancement imaging) with LVEF ≥ 55% and 40 controls matched for age and LVEF...
April 18, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28420670/confirmed-early-myocardial-rupture-in-a-patient-with-pulseless-electrical-activity-pea-following-late-presentation-of-st-elevation-myocardial-infarction
#18
Baskar Sekar, Joe Martins, Sanjiv Petkar
A 69 year old male, an ex-smoker, was admitted with ongoing chest pain of 11 hours duration. Past medical history included treated hypertension and gastro-oesophageal reflux disease. He delayed seeking medical attention as he assumed the pain to be due to indigestion and kept taking antacids without much symptomatic relief. Clinical examination on arrival was unremarkable. Admission 12 lead electrocardiogram (ECG) was diagnostic of a recent anterolateral myocardial infarction (MI) (Figure 1a). Bedside trans-thoracic echocardiogram (TTE) confirmed an established anterolateral MI (Video 1, Figure 1b)...
April 18, 2017: Echo Research and Practice
https://www.readbyqxmd.com/read/28420263/an-unusual-cause-of-frequent-sudden-transient-unexplained-falls-and-new-onset-status-epilepticus-case-report-and-mini-review
#19
Dinesh Singh, Alford Dyer, Sherry Gu, Patrick McCarville, Annie Hess, Olugbenga Akingbola, Jane El-Dahr, Stephen Nelson
We report a 14-year old adolescent Caucasian female, who presented with frequent, sudden, transient, and unexplained falls leading to multiple serious injuries to her head and extremities requiring several visits to the emergency department. She was evaluated numerous times and imaging studies, echocardiogram, electrocardiogram, and electroencephalogram studies were all normal. She eventually presented to outside emergency department with dystonic posturing and status epilepticus and was transferred to our pediatric intensive care unit for further management...
April 1, 2017: Clinical Pediatrics
https://www.readbyqxmd.com/read/28420219/integrated-flexible-electronic-devices-based-on-passive-alignment-for-physiological-measurement
#20
Jin Hwa Ryu, Sangwon Byun, In-Bok Baek, Bong Kuk Lee, Won Ick Jang, Eun-Hye Jang, Ah-Yung Kim, Han Yung Yu
This study proposes a simple method of fabricating flexible electronic devices using a metal template for passive alignment between chip components and an interconnect layer, which enabled efficient alignment with high accuracy. An electrocardiogram (ECG) sensor was fabricated using 20 µm thick polyimide (PI) film as a flexible substrate to demonstrate the feasibility of the proposed method. The interconnect layer was fabricated by a two-step photolithography process and evaporation. After applying solder paste, the metal template was placed on top of the interconnect layer...
April 18, 2017: Sensors
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