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Annals of Noninvasive Electrocardiology

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https://www.readbyqxmd.com/read/28517367/rationale-and-design-of-a-randomized-trial-to-assess-the-safety-and-efficacy-of-multipoint-pacing-mpp-in-cardiac-resynchronization-therapy-the-mpp-trial
#1
Gery Tomassoni, James Baker, Raffaele Corbisiero, Charles Love, David Martin, Robert Sheppard, Seth J Worley, Kwangdeok Lee, Imran Niazi
BACKGROUND: Although the majority of Class III congestive heart failure (HF) patients treated with cardiac resynchronization therapy (CRT) show a clinical benefit, up to 40% of patients do not respond to CRT. This paper reports the design of the MultiPoint Pacing (MPP) trial, a prospective, randomized, double-blind, controlled study to evaluate the safety and efficacy of CRT using MPP compared to standard biventricular (Bi-V) pacing. METHODS: A maximum of 506 patients with a standard CRT-D indication will be enrolled at up to 50 US centers...
May 18, 2017: Annals of Noninvasive Electrocardiology
https://www.readbyqxmd.com/read/28510313/categorization-and-theoretical-comparison-of-quantitative-methods-for-assessing-qt-rr-hysteresis
#2
REVIEW
Hugo Gravel, Daniel Curnier, Nagib Dahdah, Vincent Jacquemet
BACKGROUND: In the human electrocardiogram, there is a lag of adaptation of the QT interval to heart rate changes, usually termed QT/RR hysteresis (QT-hys). Subject-specific quantifiers of QT-hys have been proposed as potential biomarkers, but there is no consensus on the choice of the quantifier. METHODS: A comprehensive literature search was conducted to identify original articles reporting quantifiers of repolarization hysteresis from the surface ECG in humans...
May 16, 2017: Annals of Noninvasive Electrocardiology
https://www.readbyqxmd.com/read/28508439/conventional-and-right-sided-screening-for-subcutaneous-icd-in-a-population-with-congenital-heart-disease-at-high-risk-of-sudden-cardiac-death
#3
Pau Alonso, Joaquín Osca, Joaquín Rueda, Oscar Cano, Pedro Pimenta, Ana Andres, María José Sancho, Luis Martinez
BACKGROUND: Information regarding suitability for subcutaneous defibrillator (sICD) implantation in tetralogy of Fallot (ToF) and systemic right ventricle is scarce and needs to be further explored. The main objective of our study was to determine the proportion of patients with ToF and systemic right ventricle eligible for sICD with both, standard and right-sided screening methods. Secondary objectives were: (i) to study sICD eligibility specifically in patients at high risk of sudden cardiac death, (ii) to identify independent predictors for sICD eligibility, and (iii) to compare the proportion of eligible patients in a nonselected ICD population...
May 15, 2017: Annals of Noninvasive Electrocardiology
https://www.readbyqxmd.com/read/28497888/gender-equity-imbalance-in-electrocardiology-a-call-to-action
#4
EDITORIAL
Erica Clarke Whalen, Grace Xu, Iwona Cygankiewicz, Ljuba Bacharova, Wojciech Zareba, Jonathan S Steinberg, Larisa G Tereshchenko, Adrian Baranchuk
No abstract text is available yet for this article.
May 12, 2017: Annals of Noninvasive Electrocardiology
https://www.readbyqxmd.com/read/28497865/predictors-and-implications-of-early-left-ventricular-ejection-fraction-improvement-in-new-onset-idiopathic-nonischemic-cardiomyopathy-with-narrow-qrs-complex-a-neolith-substudy
#5
Norman C Wang, Evan C Adelstein, Sandeep K Jain, Stuart G Mendenhall, Alaa A Shalaby, Andrew H Voigt, Samir Saba
BACKGROUND: Predictors and implications of early left ventricular ejection fraction (LVEF) improvement with guideline-directed medical therapy (GDMT) in new-onset idiopathic nonischemic cardiomyopathy (NICM) with narrow QRS complex are not well described. The objectives were to describe predictors of LVEF improvement after 3 months on GDMT and adverse cardiac events based on post-GDMT LVEF status (≤35% vs. >35%). METHODS: A retrospective cohort study was performed in subjects with new-onset NICM, LVEF ≤35%, and narrow QRS complex...
May 12, 2017: Annals of Noninvasive Electrocardiology
https://www.readbyqxmd.com/read/28497860/intermittent-preexcitation-indicates-a-low-risk-accessory-pathway-time-for-a-paradigm-shift
#6
Marek Jastrzębski, Piotr Kukla, Maciej Pitak, Andrzej Rudziński, Adrian Baranchuk, Danuta Czarnecka
We report three patients with intermittent loss of the preexcitation pattern in the ECG that had undergone an electrophysiological study. Despite apparently poorly conducting accessory pathway (AP), in each case a fast anterograde conduction, either during spontaneous atrial fibrillation or during incremental atrial pacing (on isoproterenol) was documented; shortest preexcited RR intervals of 200-240 ms were observed. We review the literature and conclude that intermittent preexcitation observed on resting 12-lead ECG lacks sufficient specificity for the diagnosis of an AP with long refractory period and cannot be considered a substitute for electrophysiological study in patients with this electrocardiographical phenomenon...
May 12, 2017: Annals of Noninvasive Electrocardiology
https://www.readbyqxmd.com/read/28497858/beat-to-beat-ecg-restitution-a-review-and-proposal-for-a-new-biomarker-to-assess-cardiac-stress-and-ventricular-tachyarrhythmia-vulnerability
#7
REVIEW
Anthony A Fossa
BACKGROUND: Cardiac restitution is the ability of the heart to recover from one beat to the next. Ventricular arrhythmia vulnerability can occur when the heart does not properly adjust to sudden changes in rate or in hemodynamics leading to excessive temporal and/or spatial heterogeneity in conduction or repolarization. Restitution has historically been used to study, by invasive means, the dynamics of the relationship between action potential duration (APD) and diastolic interval (DI) in sedated subjects using various pacing protocols...
May 12, 2017: Annals of Noninvasive Electrocardiology
https://www.readbyqxmd.com/read/28467014/the-exception-to-marriot-s-sign
#8
Vivek Reddy, Shanker Kundumadam, Pradeep Kathi, Kunwardeep Dhillon, Hibah Ismail, Gautam Anem
Differentiation of a wide complex arrhythmia can pose as a clinical challenge in the acute care setting. Two broad differentials exist including ventricular tachycardia versus supraventricular tachycardia with aberrancy, underlying bundle branch block or intrinsic conduction defect. To aid in distinguishing between supraventricular tachycardia and ventricular tachycardia, Brugada criteria is commonly used, albeit new algorithms have become more common. Marriott's sign, a taller peak in the first R wave when compared to R' is considered a specific criterion for distinguishing between these two entities and strongly favors the diagnosis of ventricular tachycardia...
May 3, 2017: Annals of Noninvasive Electrocardiology
https://www.readbyqxmd.com/read/28440600/impact-of-atrial-fibrillation-detected-by-extended-monitoring-a-population-based-cohort-study
#9
Mathias C Busch, Stefan Gross, Dietrich Alte, Jan A Kors, Henry Völzke, Till Ittermann, André Werner, Anne Krüger, Raila Busch, Marcus Dörr, Stephan B Felix
BACKGROUND: The clinical relevance of extended monitoring of AF in the general population is unclear. The study evaluated the detection of AF using transtelephonic electrocardiography and the clinical relevance of additional AF findings, especially with regard to stroke risk and mortality. METHODS: The data of 1678 volunteers participating in the tele-ECG-subproject of the Study of Health in Pomerania was evaluated. Occurrence of AF as revealed by tele-ECG and conventional ECG was evaluated...
April 25, 2017: Annals of Noninvasive Electrocardiology
https://www.readbyqxmd.com/read/28440585/is-obesity-related-to-postexercise-cardiac-autonomic-recovery
#10
LETTER
Wendell Arthur Lopes, Felipe de Oliveira Matos, Fernanda Errero Porto
No abstract text is available yet for this article.
April 25, 2017: Annals of Noninvasive Electrocardiology
https://www.readbyqxmd.com/read/28440568/impact-of-t-wave-amplitude-in-lead-avr-on-predicting-cardiac-events-in-ischemic-and-nonischemic-cardiomyopathy-patients-with-an-implantable-cardioverter-defibrillator
#11
Yoshihiro Tanaka, Tetsuo Konno, Yudai Tamura, Toyonobu Tsuda, Hiroshi Furusho, Masayuki Takamura, Kenji Sakata, Masakazu Yamagishi, Kenshi Hayashi
BACKGROUND: T wave amplitudes during ventricular repolarization in the lead aVR (TAaVR) are shown to be associated with adverse cardiac events in patients with several cardiovascular diseases, such as postmyocardial infarction. However, the utility of TAaVR has not been previously evaluated in patients with cardiomyopathy who have received implantable cardioverter defibrillators (ICD). Patients with ischemic or nonischemic cardiomyopathy (ICM or NICM, respectively) and who received an ICD may experience worsening of their condition due to the introduction of electric shock during treatment...
April 25, 2017: Annals of Noninvasive Electrocardiology
https://www.readbyqxmd.com/read/28432709/a-new-modality-for-the-estimation-of-corrected-flow-time-via-electrocardiography-as-an-alternative-to-doppler-ultrasonography
#12
Hooman Hossein-Nejad, Payam Mohammadinejad, Atefeh Zeinoddini, Seyedhossein Seyedhosseini Davarani, Mohsen Banaie
BACKGROUND: Evaluation of corrected flow time (FTc) via ultrasonography is one of the suggested modalities for the assessment of intravascular volume status. This study aimed to compare the results of FTc of carotid artery measured via ultrasonography, as a measure of mechanical outcome of the cardiac cycle, with the results of FTc estimation from a new modified formula via electrocardiography (ECG), as a measure of electrical function of the cardiac cycle. METHODS: Healthy volunteers were evaluated before and after a passive leg raising (PLR) maneuver...
April 22, 2017: Annals of Noninvasive Electrocardiology
https://www.readbyqxmd.com/read/28429500/electrocardiographic-appearance-of-aortic-stenosis-before-and-after-aortic-valve-replacement
#13
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/28429493/cutting-off-half-of-qrs-duration-can-cause-overcorrection-of%C3%A2-qt-interval-in-left-bundle-branch-block
#14
LETTER
Binhao Wang, Li Zhang, Yunlong Xia
No abstract text is available yet for this article.
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
#15
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/28429454/scuba-diving-patent-foramen-ovale-and-heart-rhythm-disturbances-the-role-of-underwater-holter-monitoring-case-report
#16
Szymon Olędzki, Andrzej Wojtarowicz, Edyta Płońska-Gościniak, Maciej Lewandowski, Jarosław Gorący
Patent foramen ovale (PFO) is thought to be a risk factor for decompression illness (DCI). Catheter-based closure procedure reduces the risk of DCI in selected scuba divers with PFO. Major complication of invasive approach are rare, minor, especially heart rhythm disturbances are reported relatively often. We describe a case of 41-year-old diver, who underwent PFO closure due to recurrent DCI events. Afterward, he experienced no DCI symptoms; however, he complained about feeling of the heart beating during a submersion...
April 21, 2017: Annals of Noninvasive Electrocardiology
https://www.readbyqxmd.com/read/28299892/the-relationship-between-j-waves-and-contact-of-lung-cancer-with-the-heart
#17
Hideki Hayashi, Qi Wu, Minoru Horie
BACKGROUND: J waves result mainly from an increased density of transient outward current (Ito ). Mechanical stretch to the heart activates multiple signal transduction pathways, in which Ito may be involved. The purpose of this study was to test the hypothesis that mechanical contact of lung cancer with the heart may manifest J waves. METHODS: We reviewed 12-lead electrocardiograms to examine whether J waves were associated with contact of lung cancer with the heart...
March 16, 2017: Annals of Noninvasive Electrocardiology
https://www.readbyqxmd.com/read/28248005/evaluation-of-the-ecg-based-selvester-scoring-method-to-estimate-myocardial-scar-burden-and-predict-clinical-outcome-in-patients-with-left-bundle-branch-block-with-comparison-to-late-gadolinium-enhancement-cmr-imaging
#18
Uzma Chaudhry, Pyotr G Platonov, Robert Jablonowski, Jean-Philippe Couderc, Henrik Engblom, Xiajuang Xia, Björn Wieslander, Brett D Atwater, David G Strauss, Jesper Van der Pals, Martin Ugander, Marcus Carlsson, Rasmus Borgquist
BACKGROUND: Myocardial scar burden quantification is an emerging clinical parameter for risk stratification of sudden cardiac death and prediction of ventricular arrhythmias in patients with left ventricular dysfunction. We investigated the relationships among semiautomated Selvester score burden and late gadolinium enhancement-cardiovascular magnetic resonance (LGE-CMR) assessed scar burden and clinical outcome in patients with underlying heart failure, left bundle branch block (LBBB) and implantable cardioverter-defibrillator (ICD) treatment...
March 1, 2017: Annals of Noninvasive Electrocardiology
https://www.readbyqxmd.com/read/28247979/effects-of-exercise-training-intensity-on-cardiac-autonomic-regulation-in-habitual-smokers
#19
Choun-Sub Kim, Maeng-Kyu Kim, Hye-Young Jung, Mi-Ji Kim
BACKGROUND: The sympathoexcitatory effects of cigarette smoking cause an autonomic imbalance that may lead to cardiovascular disease. Aerobic training improves autonomic function by developing cardiorespiratory fitness; however, it is still uncertain whether aerobic training ameliorates the compromised autonomic modulation in smokers. This study aimed to investigate the effects of 8 weeks' aerobic training at different exercise intensities on autonomic regulation in habitual smokers...
March 1, 2017: Annals of Noninvasive Electrocardiology
https://www.readbyqxmd.com/read/28247524/assessment-of-heart-rate-response-to-exercise-and-recovery-during-treadmill-testing-in-arsenic-exposed-workers
#20
Ugur Nadir Karakulak, Meside Gunduzoz, Mehmet Ayturk, Mujgan Tek Ozturk, Engin Tutkun, Omer Hinc Yilmaz
BACKGROUND: Arsenic exposure is associated with various cardiovascular diseases. The aim of the present study was to assess cardiac autonomic function via heart rate response to exercise and recovery period of treadmill testing in arsenic-exposed workers. METHODS: Sixty-five (65) occupationally arsenic-exposed workers and 35 healthy controls were enrolled. Blood and urinary arsenic levels were analyzed and symptom limited maximal treadmill exercise test were performed...
March 1, 2017: Annals of Noninvasive Electrocardiology
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