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Annals of Noninvasive Electrocardiology

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https://www.readbyqxmd.com/read/28921787/myocardial-bridging-is-associated-with-exercise-induced-ventricular-arrhythmia-and-increases-in-qt-dispersion
#1
Makiko Nishikii-Tachibana, Vedant S Pargaonkar, Ingela Schnittger, Francois Haddad, Ian S Rogers, Jennifer A Tremmel, Paul J Wang
BACKGROUND: A myocardial bridge (MB) has been associated with ventricular arrhythmia and sudden death during exercise. QT dispersion (QTd) is a measure of abnormal repolarization and may predict ventricular arrhythmia. We investigated the frequency of ventricular arrhythmias during exercise and the QTd at rest and after exercise, in patients with an MB compared to a normal cohort. METHODS: We studied the rest and stress ECG tracings of patients with an MB suspected by focal septal buckling on exercise echocardiography (EE) (Echo-MB group, N = 510), those with an MB confirmed by another examination (MB group, N = 110), and healthy controls (Control group, N = 198)...
September 18, 2017: Annals of Noninvasive Electrocardiology
https://www.readbyqxmd.com/read/28901675/sudden-cardiac-death-in-isolated-right-ventricular-hypertrabeculation-noncompaction-cardiomyopathy
#2
Soad Bekheit, Boutros Karam, Farshid Daneshvar, Julie Zaidan, Rabih Tabet, Jonathan Spagnola, James Lafferty
Hypertrabeculation/noncompaction of the myocardium is a rare disorder that involves most commonly the left ventricle of the heart and it has been recognized as a distinct cardiomyopathy by the World Health Organization. However, it is extremely rare for this condition to involve exclusively the right ventricle. We report the cases of three patients who presented with ventricular tachyarrhythmia and sudden cardiac death. They were found to have isolated right ventricular hypertrabeculation/noncompaction on echocardiography...
September 12, 2017: Annals of Noninvasive Electrocardiology
https://www.readbyqxmd.com/read/28901670/specificity-of-wide-qrs-complex-tachycardia-criteria-and-algorithms-in-patients-with-ventricular-preexcitation
#3
Marek Jastrzębski, Paweł Moskal, Piotr Kukla, Kamil Fijorek, Roksana Kisiel, Danuta Czarnecka
BACKGROUND: Despite substantial progress in the field of differentiation between ventricular tachycardia (VT) and supraventricular tachycardia (SVT) with wide QRS complexes, differentiation between VT and preexcited SVT remains largely unresolved due to significant overlap in QRS morphology. Our aim was to assess the specificities of various single ECG criteria and sets of criteria (Brugada algorithm, aVR algorithm, Steurer algorithm, and the VT score) for diagnosis of VT in a sizable cohort of patients with preexcitation...
September 12, 2017: Annals of Noninvasive Electrocardiology
https://www.readbyqxmd.com/read/28901628/total-cosine-r-to-t-for-predicting-ventricular-arrhythmic-and-mortality-outcomes-a-systematic-review-and-meta-analysis
#4
Gary Tse, Mengqi Gong, Cheuk Wai Wong, Cynthia Chan, Stamatis Georgopoulos, Yat Sun Chan, Bryan P Yan, Guangping Li, Paula Whittaker, Ana Ciobanu, Sadeq Ali-Hasan-Al-Saegh, Sunny H Wong, William K K Wu, George Bazoukis, Konstantinos Lampropoulos, Wing Tak Wong, Lap Ah Tse, Adrian M Baranchuk, Konstantinos P Letsas, Tong Liu
BACKGROUND: The total cosine R-to-T (TCRT), a vectorcardiographic marker reflecting the spatial difference between the depolarization and repolarization wavefronts, has been used to predict ventricular tachycardia/fibrillation (VT/VF) and sudden cardiac death (SCD) in different clinical settings. However, its prognostic value has been controversial. OBJECTIVE: This systematic review and meta-analysis evaluated the significance of TRCT in predicting arrhythmic and/or mortality endpoints...
September 12, 2017: Annals of Noninvasive Electrocardiology
https://www.readbyqxmd.com/read/28856762/pregbalin-induced-recurrent-syncopal-attacks-with-prolong-qt-interval
#5
Adem Adar, Fahri Cakan, Orhan Önalan
Long QT syndrome may lead to fatal dysrhythmia. Prolongation of QT interval due to pregabalin has been shown in rats and no data is available in humans. We report a 80-year-old female patient using pregabalin. She was presented to emergency room with syncope attacks. Her admission electrocardiography demonstrated prolonged QT interval. After excluding the possible causes of the long QT syndrome, we attributed prolonged QT interval to pregabalin therapy. After discontinuation of pregabalin QT interval returned to normal range and patient experienced no further syncope attacks...
August 30, 2017: Annals of Noninvasive Electrocardiology
https://www.readbyqxmd.com/read/28856752/differentiation-of-wide-qrs-tachycardia-garbage-in-garbage-out
#6
LETTER
Marek Jastrzębski, Piotr Kukla
No abstract text is available yet for this article.
August 30, 2017: Annals of Noninvasive Electrocardiology
https://www.readbyqxmd.com/read/28836312/premature-ventricular-contraction-induced-concealed-retrograde-penetration-electrocardiographic-manifestations-on-anterograde-ventricular-preexcitation
#7
Damián Longo, Adrian Baranchuk
In patients with manifest anterograde ventricular preexcitation, the electrocardiographic manifestation of the anomalous conduction through the simultaneous conduction over the atrioventricular (AV) node and the accessory pathway ("delta wave"); depends on several factors, the most representative being the conduction velocity over one or another connection. Occasionally, ventricular ectopic beats may present with retrograde penetration over one or both conduction pathways (AV node and/or accessory pathway), impacting on the morphology of the next immediate anterogradely conducted QRS...
August 24, 2017: Annals of Noninvasive Electrocardiology
https://www.readbyqxmd.com/read/28833997/role-of-surface-electrocardiogram-precordial-leads-in-localizing-different-anatomic-sites-of-ectopic-atrial-tachycardia-arising-from-lower-right-atrium-in-pediatric-population
#8
Lamyaa Elsayed Allam, Rania Samir Ahmed, Mazen Tawfik Ghanem
BACKGROUND: The study was designed to examine P wave morphology (PWM) in precordial leads (V1 -V6 ) during ectopic atrial tachycardia (EAT) originating from low right atrium (RA) to identify the anatomic sites of these foci in children. METHODS: Twenty-three consecutive pediatric patients (56% females, mean age 8.5 ± 2.5) with EAT originating from the low RA underwent detailed atrial endocardial activation mapping and radiofrequency ablation. PWM during EAT was analyzed using standard 12-lead ECG in relation to successful ablation sites in RA...
August 19, 2017: Annals of Noninvasive Electrocardiology
https://www.readbyqxmd.com/read/28833859/supraventricular-tachycardia-pregnancy-and-water-a-new-insight-in-lifesaving-treatment-of-rhythm-disorders
#9
Francesco Massari, Pietro Scicchitano, Angela Potenza, Marco Sassara, Mariella Sanasi, Mariarosa Liccese, Marco Matteo Ciccone, Pasquale Caldarola
Pregnancy may predispose to paroxysmal supraventricular tachycardia (SVT), in subjects with or without identifiable heart disease. Many physiological conditions such as autonomic nervous system changes, altered systemic hemodynamics, etc. can contribute to the onset of arrhythmias during pregnancy. Some cases reported the occurrence of arrhythmias in relation to systemic fluid variations. We report the case of a pregnant woman who experienced SVT due to fluid depletion, detected by bioimpedance vector analysis (BIVA), which was successfully treated by water repletion under tight BIVA monitoring...
August 19, 2017: Annals of Noninvasive Electrocardiology
https://www.readbyqxmd.com/read/28741870/impact-of-functional-training-on-geometric-indices-and-fractal-correlation-property-of-heart-rate-variability-in-postmenopausal-women
#10
Marianne P da C de Rezende Barbosa, Luiz C M Vanderlei, Lucas M Neves, Carolina Takahashi, Paula R Dos S Torquato, Ana Claúdia de S Fortaleza, Ismael F Freitas Júnior, Isabel C E Sorpreso, Luiz C Abreu, Andrés R Pérez Riera
BACKGROUND: To evaluate the influence of functional training on the geometric indices of heart rate variability (HRV) and fractal correlation properties of the dynamics of heart rate in menopausal women. METHODS: Of 39 women who were in the period of menopause for more than a year and who did not practice any regular physical activity were divided into: Functional training group (FTG = 50 ± 4.5 years; 67.64 ± 11.64 kg; 1.5 ± 0.05 m) that executed the functional training (FT) and all proposals by reviews and the Control group (58...
July 25, 2017: Annals of Noninvasive Electrocardiology
https://www.readbyqxmd.com/read/28670841/the-sensitivity-of-38-heart-rate-variability-measures-to-the-addition-of-artifact-in-human-and-artificial-24-hr-cardiac-recordings
#11
Nicolas J C Stapelberg, David L Neumann, David H K Shum, Harry McConnell, Ian Hamilton-Craig
BACKGROUND: Artifact is common in cardiac RR interval data derived from 24-hr recordings and has a significant impact on heart rate variability (HRV) measures. However, the relative impact of progressively added artifact on a large group of commonly used HRV measures has not been assessed. This study compared the relative sensitivity of 38 commonly used HRV measures to artifact to determine which measures show the most change with increasing increments of artifact. A secondary aim was to ascertain whether short-term and long-term HRV measures, as groups, share similarities in their sensitivity to artifact...
July 2, 2017: Annals of Noninvasive Electrocardiology
https://www.readbyqxmd.com/read/28670758/congenital-long-qt-syndrome-and-torsade-de-pointes
#12
REVIEW
Nabil El-Sherif, Gioia Turitto, Mohamed Boutjdir
Since its initial description by Jervell and Lange-Nielsen in 1957, the congenital long QT syndrome (LQTS) has been the most investigated cardiac ion channelopathy. A prolonged QT interval in the surface electrocardiogram is the sine qua non of the LQTS and is a surrogate measure of the ventricular action potential duration (APD). Congenital as well as acquired alterations in certain cardiac ion channels can affect their currents in such a way as to increase the APD and hence the QT interval. The inhomogeneous lengthening of the APD across the ventricular wall results in dispersion of APD...
July 2, 2017: Annals of Noninvasive Electrocardiology
https://www.readbyqxmd.com/read/28660734/the-association-of-qt-interval-components-with-atrial-fibrillation
#13
Nikhil Patel, Wesley T O'Neal, S Patrick Whalen, Elsayed Z Soliman
BACKGROUND: Although abnormalities of the QT interval are associated with atrial fibrillation (AF), it is unclear whether ventricular depolarization (QRS duration) or repolarization (JT interval) is a more important marker of AF risk. METHODS: This analysis included 4,181 (95% white; 59% women) participants from the Cardiovascular Health Study (CHS) who were free of baseline AF and major intraventricular delay. A linear scale was used to compute heart rate adjusted QT (QTa), QRS (QRSa ), and JT (JTa ) intervals...
June 29, 2017: Annals of Noninvasive Electrocardiology
https://www.readbyqxmd.com/read/28660689/a-rare-form-of-extremely-wide-qrs-complex-due-to-reversed-homologous-electrical-ventricular-separation-of-acute-heart-failure
#14
Sujuan Yan, Jianhua Yu, Zhen Xia, Bo Zhu, Jinzhu Hu, Juxiang Li
Electrical ventricular separation, as a special complete intraventricular block, denotes that ventricles be electrically separated into two or more parts caused by severe and wide damage of myocardium and conduction. Electrical ventricular separation can be divided into homologous and heterologous, homologous electrical ventricular separation is a rare phenomenon, literally the excitement of whole ventricle originate from supraventricle, on ECG, there are two different QRS waves which connect with an isoelectric line, one ST segment and T wave...
June 29, 2017: Annals of Noninvasive Electrocardiology
https://www.readbyqxmd.com/read/28653394/ranolazine-reduces-repolarization-heterogeneity-in%C3%A2-symptomatic-patients-with-diabetes-and-non-flow-limiting-coronary-artery-stenosis
#15
Ederson Evaristo, Fernando G Stocco, Nishant R Shah, Michael K Cheezum, Jon Hainer, Courtney Foster, Bruce D Nearing, Marcelo Di Carli, Richard L Verrier
BACKGROUND: Experimental evidence suggests that ranolazine decreases susceptibility to ischemia-induced arrhythmias independent of effects on coronary artery blood flow. OBJECTIVE: In symptomatic diabetic patients with non-flow-limiting coronary artery stenosis with diffuse atherosclerosis and/or microvascular dysfunction, we explored whether ranolazine reduces T-wave heterogeneity (TWH), an electrocardiographic (ECG) marker of arrhythmogenic repolarization abnormalities shown to predict sudden cardiac death...
June 27, 2017: Annals of Noninvasive Electrocardiology
https://www.readbyqxmd.com/read/28653364/bigeminal-sandwiches-galore
#16
Thomas Lindow, Angelica Niklasson, Daniel Manna, Olle Pahlm
A long run of PVCs "sandwiched" in between the sinus beats resulting in an almost doubling of the heart rate-interpolated PVCs in bigeminy-is described. This case illustrates three interesting aspects of interpolated PVCs. Although they are not uncommon, long runs of interpolated PVCs in bigeminy are rare findings. In this case, the arrhythmia had a duration of 3 minutes. Second, it illustrates the "age-old wisdom" of partial retrograde conduction. Also, even though the arrhythmia resulted in an almost doubling of the heart rate, the patient remained asymptomatic...
June 27, 2017: Annals of Noninvasive Electrocardiology
https://www.readbyqxmd.com/read/28653348/asystole-caused-by-hydroxycut-hardcore-a-case-report-and-literature-review
#17
Julie Zaidan, Rabih Tabet, Boutros Karam, Farshid Daneshvar, Mohammed Raza, Soad Bekheit
Obesity is a rising epidemic worldwide driving people to search for remedy through nonconventional therapies. Hydroxycut products are popular supplements used as weight loss aids. Many reports revealed serious adverse effects related to their ingestion. We report the case of a 37-year-old healthy male patient who presented following an episode of syncope. On telemetry, he manifested recurrent sinus node arrests, including a symptomatic 24 s sinus pause. The patient admitted to taking Hydroxycut Hardcore for 10 days previously...
June 27, 2017: Annals of Noninvasive Electrocardiology
https://www.readbyqxmd.com/read/27535113/novel-electrocardiographic-indices-of-arrhythmogenesis-and-blood-lead-level
#18
LETTER
Leili Pourafkari, Arezou Tajlil, Nader D Nader
No abstract text is available yet for this article.
September 2017: Annals of Noninvasive Electrocardiology
https://www.readbyqxmd.com/read/28590020/reply-qt-interval-measurements-in-patients-with-left-bundle-branch-block-there-is-yet-more-to-learn-about-repolarization
#19
LETTER
Harilaos Bogossian, Gerrit Frommeyer, Markus Zarse
No abstract text is available yet for this article.
July 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
#20
LETTER
Binhao Wang, Li Zhang, Yunlong Xia
No abstract text is available yet for this article.
July 2017: Annals of Noninvasive Electrocardiology
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