journal
MENU ▼
Read by QxMD icon Read
search

Circulation. Arrhythmia and Electrophysiology

journal
https://www.readbyqxmd.com/read/28408653/drug-induced-arrhythmias-precision-medicine-and-small-data
#1
EDITORIAL
Glenn I Fishman
No abstract text is available yet for this article.
April 2017: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/28408652/premature-ventricular-contraction-coupling-interval-variability-destabilizes-cardiac-neuronal-and-electrophysiological-control-insights-from-simultaneous-cardioneural-mapping
#2
David Hamon, Pradeep S Rajendran, Ray W Chui, Olujimi A Ajijola, Tadanobu Irie, Ramin Talebi, Siamak Salavatian, Marmar Vaseghi, Jason S Bradfield, J Andrew Armour, Jeffrey L Ardell, Kalyanam Shivkumar
BACKGROUND: Variability in premature ventricular contraction (PVC) coupling interval (CI) increases the risk of cardiomyopathy and sudden death. The autonomic nervous system regulates cardiac electrical and mechanical indices, and its dysregulation plays an important role in cardiac disease pathogenesis. The impact of PVCs on the intrinsic cardiac nervous system, a neural network on the heart, remains unknown. The objective was to determine the effect of PVCs and CI on intrinsic cardiac nervous system function in generating cardiac neuronal and electric instability using a novel cardioneural mapping approach...
April 2017: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/28408651/disease-severity-and-exercise-testing-reduce-subcutaneous-implantable-cardioverter-defibrillator-left-sternal-ecg-screening-success-in-hypertrophic-cardiomyopathy
#3
Neil T Srinivasan, Kiran H Patel, Kashif Qamar, Amy Taylor, Marco Bacà, Rui Providência, Maria Tome-Esteban, Perry M Elliott, Pier D Lambiase
BACKGROUND: The features of the hypertrophic cardiomyopathy (HCM) ECG make it a challenge for subcutaneous implantable cardioverter-defibrillator (S-ICD) screening. We aimed to investigate the causes of screening failure at rest and on exercise to inform optimal S-ICD ECG vector development. METHODS AND RESULTS: One hundred and thirty-one HCM patients (age, 50±16 years; 92 males and 39 females) with ≥1 HCM risk factor for sudden death underwent S-ICD ECG screening at rest and on exercise...
April 2017: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/28408650/challenges-and-pitfalls-of-entrainment-mapping-of-ventricular-tachycardia-ten-illustrative-concepts
#4
Roderick Tung
No abstract text is available yet for this article.
April 2017: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/28408649/external-arrhythmia-ablation-using-photon-beams-ablation-of-the-atrioventricular-junction-in-an-intact-animal-model
#5
H Immo Lehmann, Amanda J Deisher, Mitsuru Takami, Jon J Kruse, Limin Song, Sarah E Anderson, Jack T Cusma, Kay D Parker, Susan B Johnson, Samuel J Asirvatham, Robert C Miller, Michael G Herman, Douglas L Packer
BACKGROUND: This study sought to investigate external photon beam radiation for catheter-free ablation of the atrioventricular junction in intact pigs. METHODS AND RESULTS: Ten pigs were randomized to either sham irradiation or irradiation of the atrioventricular junction (55, 50, 40, and 25 Gy). Animals underwent baseline electrophysiological evaluation, cardiac gated multi-row computed tomographic imaging for beam delivery planning, and intensity-modulated radiation therapy...
April 2017: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/28408648/azithromycin-causes-a-novel-proarrhythmic-syndrome
#6
Zhenjiang Yang, Joseph K Prinsen, Kevin R Bersell, Wangzhen Shen, Liudmila Yermalitskaya, Tatiana Sidorova, Paula B Luis, Lynn Hall, Wei Zhang, Liping Du, Ginger Milne, Patrick Tucker, Alfred L George, Courtney M Campbell, Robert A Pickett, Christian M Shaffer, Nagesh Chopra, Tao Yang, Bjorn C Knollmann, Dan M Roden, Katherine T Murray
BACKGROUND: The widely used macrolide antibiotic azithromycin increases risk of cardiovascular and sudden cardiac death, although the underlying mechanisms are unclear. Case reports, including the one we document here, demonstrate that azithromycin can cause rapid, polymorphic ventricular tachycardia in the absence of QT prolongation, indicating a novel proarrhythmic syndrome. We investigated the electrophysiological effects of azithromycin in vivo and in vitro using mice, cardiomyocytes, and human ion channels heterologously expressed in human embryonic kidney (HEK 293) and Chinese hamster ovary (CHO) cells...
April 2017: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/28404608/discerning-from-the-good-the-bad-and-the-ugly
#7
EDITORIAL
Marina Cerrone
No abstract text is available yet for this article.
April 2017: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/28404607/interpreting-incidentally-identified-variants-in-genes-associated-with-catecholaminergic-polymorphic-ventricular-tachycardia-in-a-large-cohort-of-clinical-whole-exome-genetic-test-referrals
#8
Andrew P Landstrom, Andrew L Dailey-Schwartz, Jill A Rosenfeld, Yaping Yang, Margaret J McLean, Christina Y Miyake, Santiago O Valdes, Yuxin Fan, Hugh D Allen, Daniel J Penny, Jeffrey J Kim
BACKGROUND: The rapid expansion of genetic testing has led to increased utilization of clinical whole-exome sequencing (WES). Clinicians and genetic researchers are being faced with assessing risk of disease vulnerability from incidentally identified genetic variants which is typified by variants found in genes associated with sudden death-predisposing catecholaminergic polymorphic ventricular tachycardia (CPVT). We sought to determine whether incidentally identified variants in genes associated with CPVT from WES clinical testing represent disease-associated biomarkers...
April 2017: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/28381417/determinants-of-acute-and-late-pulmonary-vein-reconnection-in-contact-force-guided-pulmonary-vein-isolation-identifying-the-weakest-link-in-the-ablation-chain
#9
Milad El Haddad, Philippe Taghji, Thomas Phlips, Michael Wolf, Anthony Demolder, Rajin Choudhury, Sébastien Knecht, Yves Vandekerckhove, Rene Tavernier, Hiroshi Nakagawa, Mattias Duytschaever
BACKGROUND: Pulmonary vein reconnection (PVR) still determines recurrences of atrial fibrillation after contact force (CF)-guided pulmonary vein isolation. We studied whether acute PVR (adenosine and waiting time) and late PVR (at repeat) are explained by incomplete transmurality and contiguity within the deployed radiofrequency circle. METHODS AND RESULTS: We analyzed 42 CF-guided ipsilateral pulmonary vein isolation procedures. For each radiofrequency tag within the circle, we collected data reflecting lesion depth (time of application, power, impedance drop [Δ-Imp], CF, force-time integral [FTI], and ablation index [AI]) and contiguity (automated interlesion distance [ILD])...
April 2017: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/28356308/what-is-the-best-age-for-diagnostic-prediction-of-pediatric-long-qt-syndrome-with-a-borderline-qt-interval
#10
EDITORIAL
Aya Miyazaki, Hiraku Doi
No abstract text is available yet for this article.
April 2017: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/28356307/visualizing-localized-reentry-with-ultra-high-density-mapping-in-iatrogenic-atrial-tachycardia-beware-pseudo-reentry
#11
Vishal Luther, Markus Sikkel, Nathan Bennett, Fernando Guerrero, Kevin Leong, Norman Qureshi, Fu Siong Ng, Sajad A Hayat, S M Afzal Sohaib, Louisa Malcolme-Lawes, Elaine Lim, Ian Wright, Michael Koa-Wing, David C Lefroy, Nick W F Linton, Zachary Whinnett, Prapa Kanagaratnam, D Wyn Davies, Nicholas S Peters, Phang Boon Lim
BACKGROUND: The activation pattern of localized reentry (LR) in atrial tachycardia remains incompletely understood. We used the ultra-high density Rhythmia mapping system to study activation patterns in LR. METHODS AND RESULTS: LR was suggested by small rotatory activations (carousels) containing the full spectrum of the color-coded map. Twenty-three left-sided atrial tachycardias were mapped in 15 patients (age: 64±11 years). 16 253±9192 points were displayed per map, collected over 26±14 minutes...
April 2017: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/28356306/effect-of-age-and-sex-on-the-qtc-interval-in-children-and-adolescents-with-type-1-and-2-long-qt-syndrome
#12
Arja S Vink, Sally-Ann B Clur, Ronald B Geskus, Andreas C Blank, Charlotte C A De Kezel, Masao Yoshinaga, Nynke Hofman, Arthur A M Wilde, Nico A Blom
BACKGROUND: In congenital long-QT syndrome, age, sex, and genotype have been associated with cardiac events, but their effect on the trend in QTc interval has never been established. We, therefore, aimed to assess the effect of age and sex on the QTc interval in children and adolescents with type 1 (LQT1) and type 2 (LQT2) long-QT syndrome. METHODS AND RESULTS: QTc intervals of 12-lead resting electrocardiograms were determined, and trends over time were analyzed using a linear mixed-effects model...
April 2017: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/28314851/electrophysiology-of-hypokalemia-and-hyperkalemia
#13
James N Weiss, Zhilin Qu, Kalyanam Shivkumar
No abstract text is available yet for this article.
March 2017: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/28314850/temporal-trends-and-temperature-related-incidence-of-electrical-storm-the-tempest-study-temperature-related-incidence-of-electrical-storm
#14
Federico Guerra, Paolo Bonelli, Marco Flori, Laura Cipolletta, Corrado Carbucicchio, Maite Izquierdo, Edward Kozluk, Kalyanam Shivkumar, Marmar Vaseghi, Francesca Patani, Claudio Cupido, Salvatore Pala, Ricardo Ruiz-Granell, Angel Ferrero, Claudio Tondo, Alessandro Capucci
BACKGROUND: The occurrence of ventricular tachyarrhythmias seems to follow circadian, daily, and seasonal distributions. Our aim is to identify potential temporal patterns of electrical storm (ES), in which a cluster of ventricular tachycardias or ventricular fibrillation, negatively affects short- and long-term survival. METHODS AND RESULTS: The TEMPEST study (Circannual Pattern and Temperature-Related Incidence of Electrical Storm) is a patient-level, pooled analysis of previously published data sets...
March 2017: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/28314849/prognostic-implications-of-nonsustained-ventricular-tachycardia-in-high-risk-patients-with-hypertrophic-cardiomyopathy
#15
Weijia Wang, Zhesi Lian, Ethan J Rowin, Barry J Maron, Martin S Maron, Mark S Link
BACKGROUND: The prognostic significance of nonsustained ventricular tachycardia (NSVT) in patients with hypertrophic cardiomyopathy is incompletely resolved. METHODS AND RESULTS: The study group comprised 160 patients with implantable cardioverter defibrillators (ICDs), of whom 94 patients had 24- to 48-hour ambulatory monitoring preimplant. ICDs were interrogated and ambulatory ECGs monitored for NSVT episodes, with associations between NSVT- and ICD-treated ventricular arrhythmias examined...
March 2017: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/28314848/effects-of-late-sodium-current-blockade-on-ventricular-refibrillation-in-a-rabbit-model
#16
Mohammed Ali Azam, Nima Zamiri, Stéphane Massé, Marjan Kusha, Patrick F H Lai, Govind K Nair, Nigel S Tan, Christopher Labos, Kumaraswamy Nanthakumar
BACKGROUND: After defibrillation of initial ventricular fibrillation (VF), it is crucial to prevent refibrillation to ensure successful resuscitation outcomes. Inability of the late Na(+) current to inactivate leads to intracellular Ca(2+) dysregulation and arrhythmias. Our aim was to determine the effects of ranolazine and GS-967, inhibitors of the late Na(+) current, on ventricular refibrillation. METHODS AND RESULTS: Long-duration VF was induced electrically in Langendorff-perfused rabbit hearts (n=22) and terminated with a defibrillator after 6 minutes...
March 2017: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/28314847/effectiveness-of-late-ina-versus-peak-ina-block-in-the-setting-of-ventricular-fibrillation
#17
EDITORIAL
Alexander Burashnikov, Charles Antzelevitch
No abstract text is available yet for this article.
March 2017: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/28314846/circadian-and-weekly-patterns-of-electrical-storm-a-role-for-stress
#18
EDITORIAL
Eric J Berkowitz, Rachel Lampert
No abstract text is available yet for this article.
March 2017: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/28314845/distribution-and-prognostic-significance-of-fragmented-qrs-in-patients-with-brugada-syndrome
#19
Hiroshi Morita, Atsuyuki Watanabe, Yoshimasa Morimoto, Satoshi Kawada, Motomi Tachibana, Koji Nakagawa, Nobuhiro Nishii, Hiroshi Ito
BACKGROUND: Fragmented QRS complexes (fQRS) in the right precordial leads are associated with occurrence of ventricular fibrillation (VF) in Brugada syndrome. Recently, epicardial mapping has revealed abnormal electrograms at the right ventricular (RV) outflow tract and inferior region of the right ventricle. fQRS may reflect the extent of the area of abnormal potentials, but whether the distribution of fQRS has prognostic value is not known. METHODS AND RESULTS: We evaluated the existence of fQRS in 456 patients with Brugada syndrome, including 117 patients with syncope and 23 patients with VF...
March 2017: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/28292755/early-catheter-ablation-for-unstable-ventricular-tachycardia-still-too-early-to-tell
#20
EDITORIAL
John L Sapp, Ratika Parkash, George Wells
No abstract text is available yet for this article.
March 2017: Circulation. Arrhythmia and Electrophysiology
journal
journal
41999
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"