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Premature ventricular contractions

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https://www.readbyqxmd.com/read/28262259/diagnostical-mistakes-in-ablation-procedures-associated-with-a-high-placement-of-the-leads-v1-v3
#1
Damián Longo, Claudio Poliserpi, Francisco Toscano Quilon, Pedro Díaz Uberti, Carlos López, Javier García-Niebla, Irma Ramella
The misplacement of electrodes for surface electrocardiogram (ECG) recording that we use daily as a reference for mapping precise locations in invasive procedures may, besides inducing diagnostical mistakes, greatly increase the duration of the procedure and making more feasible the incidence of complications, especially in ablation of arrhythmic substrates of ventricular outflow tracts such as premature ventricular contractions (PVC's) and accessory pathways, if the right precordial electrodes (V1-V3) are higher positioned...
February 20, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28257155/surgical-retrieval-of-a-guide-wire-lost-during-central-venous-catheterization-in-a-dog
#2
Jade M Hardy, Jennifer L Lansdowne, Carol A Himsel, Sean R Freer
OBJECTIVE: To report a case of successful surgical removal of a guide wire lost during central venous catheterization. CASE SUMMARY: A 28 kg, 4-year-old female neutered mixed breed dog presented to the primary care veterinarian with diabetic ketosis. During the process of central venous catheterization, the guide wire was accidently released and the entire length of the guide wire slipped into the jugular vein. Due to the absence of nearby interventional radiology facilities, surgical intervention was proposed...
March 3, 2017: Journal of Veterinary Emergency and Critical Care
https://www.readbyqxmd.com/read/28255011/ranolazine-prevents-phenotype-development-in-a-mouse-model-of-hypertrophic-cardiomyopathy
#3
Raffaele Coppini, Luca Mazzoni, Cecilia Ferrantini, Francesca Gentile, Josè Manuel Pioner, Tina Laurino, Lorenzo Santini, Valentina Bargelli, Matteo Rotellini, Gianluca Bartolucci, Claudia Crocini, Leonardo Sacconi, Chiara Tesi, Luiz Belardinelli, Jil Tardiff, Alessandro Mugelli, Iacopo Olivotto, Elisabetta Cerbai, Corrado Poggesi
BACKGROUND: Current therapies are ineffective in preventing the development of cardiac phenotype in young carriers of mutations associated with hypertrophic cardiomyopathy (HCM). Ranolazine, a late Na(+) current blocker, reduced the electromechanical dysfunction of human HCM myocardium in vitro. METHODS AND RESULTS: To test whether long-term treatment prevents cardiomyopathy in vivo, transgenic mice harboring the R92Q troponin-T mutation and wild-type littermates received an oral lifelong treatment with ranolazine and were compared with age-matched vehicle-treated animals...
March 2017: Circulation. Heart Failure
https://www.readbyqxmd.com/read/28248919/increased-local-sympathetic-nerve-activity-during-pathogenesis-of-ventricular-arrhythmias-originating-from-the-right-ventricular-outflow-tract
#4
Zefeng Wang, Huikuan Gao, Ruiqing Dong, Can Zhao, Tianyu Yu, Lu Yang, Hui Peng, Yongquan Wu
BACKGROUND The contribution of local sympathetic nerves to ventricular arrhythmia (VA) originating from the right ventricular outflow tract (RVOT) has not been elucidated. This study used a canine model to investigate the anatomical changes of the RVOT associated with VA, and the distribution of local sympathetic nerves. MATERIAL AND METHODS The RVOT-VA canine model (6 dogs) was induced with a circular catheter and high-frequency stimulation (100 Hz) in the middle of the pulmonary artery trunk. Six dogs who were not given stimulation served as the control group...
March 1, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28245348/acute-cardiac-mri-assessment-of-radiofrequency-ablation-lesions-for-pediatric-ventricular-arrhythmia-feasibility-and-clinical-correlation
#5
Elena K Grant, Charles I Berul, Russell R Cross, Jeffrey P Moak, Karin S Hamann, Kohei Sumihara, Ileen Cronin, Kendall J O'Brien, Kanishka Ratnayaka, Michael S Hansen, Peter Kellman, Laura J Olivieri
BACKGROUND: Arrhythmia ablation with current techniques is not universally successful. Inadequate ablation lesion formation may be responsible for some arrhythmia recurrences. Peri-procedural visualization of ablation lesions may identify inadequate lesions and gaps to guide further ablation and reduce risk of arrhythmia recurrence. METHODS: This feasibility study assessed acute post-procedure ablation lesions by MRI, and correlated these findings with clinical outcomes...
February 28, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/28188001/risk-factor-algorithm-used-to-predict-frequent-premature-ventricular-contraction-induced-cardiomyopathy
#6
Kyoung-Min Park, Sung Il Im, Seung-Jung Park, June Soo Kim, Young Keun On
BACKGROUND: Premature ventricular contraction (PVC) QRS duration (QRSd) and high PVCs burden are known as a risk factor of PVC-induced cardiomyopathy (CMP). The aim of this study is to find useful algorithm to predict PVC-induced CMP. METHODS: 180 patients (99 males, 51±14years) with frequent PVCs (>10%/24h), who underwent successful PVC ablation, were studied. Typical PVC-related symptoms were defined as the presence of palpitations or dropped beats during PVC...
April 15, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28182575/response-of-a-physiological-controller-for-ventricular-assist-devices-during-acute-patho-physiological-events-an-in-vitro-study
#7
Anastasios Petrou, Panagiotis Pergantis, Gregor Ochsner, Raffael Amacher, Thomas Krabatsch, Volkmar Falk, Mirko Meboldt, Marianne Schmid Daners
The current paper analyzes the performance of a physiological controller for turbodynamic ventricular assist devices (tVADs) during acute patho-physiological events. The numerical model of the human blood circulation implemented on our hybrid mock circulation was extended in order to simulate the Valsalva maneuver (VM) and premature ventricular contractions (PVCs). The performance of an end-diastolic volume (EDV)-based physiological controller for VADs, named preload responsive speed (PRS) controller was evaluated under VM and PVCs...
February 9, 2017: Biomedizinische Technik. Biomedical Engineering
https://www.readbyqxmd.com/read/28180102/concomitant-right-ventricular-outflow-tract-cryoablation-during-pulmonary-valve-replacement-in-a-patient-with-tetralogy-of-fallot
#8
Hong Ju Shin, Seunghwan Song, Yu Rim Shin, Han Ki Park, Young Hwan Park
A 38-year-old female patient with a history of tetralogy of Fallot repair at 10 years of age underwent pulmonary valve replacement with a mechanical prosthesis, tricuspid annuloplasty, and right ventricular outflow tract cryoablation due to pulmonary regurgitation, tricuspid regurgitation, and multiple premature ventricular contractions with sustained ventricular tachycardia. After surgery, she had an uneventful postoperative course with arrhythmia monitoring. She was discharged without incident, and a follow-up Holter examination showed a decrease in the number of ventricular ectopic beats from 702 to 41...
February 2017: Korean Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28174411/-primary-lung-cancer-associated-with-dilated-phase-of-hypertrophic-cardiomyopathy-report-of-a-case
#9
Takehiro Sakai, Takao Tsushima, Daisuke Kimura, Ryo Hatanaka, Masahiro Sawada, Yutaka Sato
A 66-year-old man diagnosed as dilated phase of hypertrophic cardiomyopathy (D-HCM) was pointed out an abnormal shadow on routine chest radiography. The patient had past medical history of hypertension, congestive heart failure and chronic obstructive pulmonary disease. The computed tomography showed a 3.8 cm-sized tumor in the left lower lobe of the lung, and histopathological examination revealed squamous cell carcinoma (cT2aN0-1M0, cStage I B-II A). Cardiosonography showed diffuse hypokinesis from basal to mid area, and ejection fraction was 36...
February 2017: Kyobu Geka. the Japanese Journal of Thoracic Surgery
https://www.readbyqxmd.com/read/28169055/corrigendum-to-reversal-of-left-ventricular-dysfunction-after-ablation-of-premature-ventricular-contractions-related-parameters-paradoxes-and-exceptions-to-the-rule-int-j-cardiol-222-2016-31-36
#10
Marie Sadron Blaye-Felice, David Hamon, Patrizio Pascale, Anne Rollin, Vanina Bongard, Alexandre Duparc, Pierre Mondoly, Nicolas Derval, Arnaud Denis, Christelle Cardin, Mélèze Hocini, Pierre Jaïs, Etienne Pruvot, Jurg Schlaepfer, Didier Carrié, Michel Galinier, Nicolas Lellouche, Michel Haïssaguerre, Philippe Maury
No abstract text is available yet for this article.
April 15, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28160298/fluoroless-catheter-ablation-of-cardiac-arrhythmias-a-5-year-experience
#11
Mansour Razminia, M Cameron Willoughby, Hany Demo, Hesam Keshmiri, Theodore Wang, Oliver J D'Silva, Terry A Zheutlin, Hakeem Jibawi, Paul Okumale, Richard F Kehoe
BACKGROUND: Catheter ablations have been traditionally performed with the use of fluoroscopic guidance, which exposes the patient and staff to the inherent risks of radiation. We have developed techniques to eliminate the use of fluoroscopy during cardiac ablations and have been performing completely fluoroless catheter ablations on our patients for over 5 years. METHODS: We present a retrospective analysis of the safety, efficacy, and feasibility data from 500 consecutive patients who underwent nonfluoroscopic catheter ablation, targeting a total of 639 arrhythmias, including atrioventricular reciprocating tachycardia (AVRT), atrioventricular nodal reentrant tachycardia (AVNRT), atrial tachycardia (AT), atrial fibrillation (AF), premature ventricular contractions (PVC), and ventricular tachycardia (VT)...
February 3, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28113292/non-invasive-personalisation-of-a-cardiac-electrophysiology-model-from-body-surface-potential-mapping
#12
Sophie Giffard-Roisin, Thomas Jackson, Lauren Fovargue, Jack Lee, Herve Delingette, Reza Razavi, Nicholas Ayache, Maxime Sermesant
Modelling cardiac electrophysiology (EP) can help understand pathologies and predict the response to therapies. Moreover, estimating patient-specific parameters of the EP model is crucial to obtain personalised information. The novelty of this paper is to use non-invasive data (body surface potential mapping, BSPM) in order to personalise the main parameters of a cardiac EP model for predicting different pacing conditions. First, an efficient forward model is proposed, coupling the Mitchell- Schaeffer transmembrane potential model with a current dipole formulation...
November 16, 2016: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28099609/premature-ventricular-contractions-associated-with-isotretinoin-use
#13
Sevil Alan, Betül Ünal, Aytül Yildirim
Isotretinoin has been considered a unique drug for acne treatment. However, it is associated with numerous adverse effects. Isotretinoin can trigger premature ventricular contractions. This report describes a 33-year-old-woman who presented with palpitations for 1 week while undergoing 1-month isotretinoin treatment for mild-moderate facial acne. An electrocardiogram and Holter monitoring showed premature ventricular contractions during isotretinoin (Roaccutane, Roche) treatment. Isotretinoin-related premature ventricular contractions were strongly suggested in this case due to the existence of documented premature ventricular contractions on electrocardiograms and the disappearance of these premature ventricular contractions two weeks after termination of the treatment To the authors' knowledge, there has been 1 reported case of premature ventricular contractions linked to isotretinoin use; this report describes a second such case...
November 2016: Anais Brasileiros de Dermatologia
https://www.readbyqxmd.com/read/28061370/fine-particulate-air-pollution-and-premature-ventricular-contractions-the-reasons-for-geographic-and-racial-differences-in-stroke-regards-study
#14
Wesley T O'Neal, Elsayed Z Soliman, Jimmy T Efird, Virginia J Howard, George Howard, Leslie A McClure
BACKGROUND: It is unknown if higher levels of ambient particulate matter (PM) exposure increase the risk for premature ventricular contractions (PVC) in a population-based study of men and women, and if this relationship varies by race or sex. METHODS: We examined the association of PM <2.5µm in diameter (PM2.5) concentration with PVCs in 26,121 (mean age=64±9.3 years; 55% female; 41% black) participants from the REasons for Geographic And Racial Differences in Stroke (REGARDS) study...
April 2017: Environmental Research
https://www.readbyqxmd.com/read/28058808/repeatability-of-ectopic-beats-from-48-hr-ambulatory-electrocardiography-the-atherosclerosis-risk-in-communities-aric-study
#15
Michelle L Meyer, Elsayed Z Soliman, Lisa M Wruck, Thomas H Mosley, Lynne E Wagenknecht, Anna K Poon, Eric A Whitsel, Alvaro Alonso, Gerardo Heiss, Laura R Loehr
BACKGROUND: The purpose of this study was to characterize the repeatability of ectopic beats, defined by premature atrial contractions (PACs) and premature ventricular contractions (PVCs), on ambulatory electrocardiogram (aECG) monitoring and evaluate the effect of length of aECG monitoring on the repeatability estimates. METHODS: This analysis includes 95 randomly selected participants from the Atherosclerosis Risk in Communities Study (ARIC; 2011-2013). The participants wore a Holter monitor for two, 48-hr periods separated by a mean of 38 days following an identical, standardized protocol...
January 6, 2017: Annals of Noninvasive Electrocardiology
https://www.readbyqxmd.com/read/28032935/a-double-ventricular-response-through-dual-av-nodal-pathways-can-mimic-a-premature-ventricular-contraction
#16
Taihei Itoh, Takumi Yamada
No abstract text is available yet for this article.
December 29, 2016: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/28028497/providing-an-efficient-algorithm-for-finding-r-peaks-in-ecg-signals-and-detecting-ventricular-abnormalities-with-morphological-features
#17
Mohammad Pooyan, Fateme Akhoondi
Ventricular arrhythmias are one of the most important causes of annual deaths in the world, which may lead to sudden cardiac deaths. Accurate and early diagnosis of ventricular arrhythmias in heart diseases is essential for preventing mortality in cardiac patients. Ventricular activity on the electrocardiogram (ECG) signal is in the interval from the beginning of QRS complex to T wave end. Variations in the ECG signal and its features may indicate heart condition of patients. The first step to extract features of ECG in time domain is finding R peaks...
October 2016: Journal of Medical Signals and Sensors
https://www.readbyqxmd.com/read/28026917/voltage-combined-with-pace-mapping-is-simple-and-effective-for-ablation-of-noninducible-premature-ventricular-contractions-originating-from-the-right-ventricular-outflow-tract
#18
Zefeng Wang, Heping Zhang, Hui Peng, Xuhua Shen, Zhijun Sun, Can Zhao, Ruiqing Dong, Huikuan Gao, Yongquan Wu
BACKGROUND: Premature ventricular contractions (PVCs) from the right ventricular outflow tract (RVOT) can resist conventional mapping strategies. Studies regarding optimal mapping and ablation methods for patients with noninducible RVOT-PVCs are limited. We retrospectively evaluated the efficacy and safety of a novel mapping strategy for these cases: voltage mapping combined with pace mapping. HYPOTHESIS: METHODS: We retrospectively included symptomatic patients (n = 148; 76 males; age, 44...
December 2016: Clinical Cardiology
https://www.readbyqxmd.com/read/28012210/elimination-of-ventricular-arrhythmia-in-catecholaminergic-polymorphic-ventricular-tachycardia-by-targeting-catecholamine-sensitive-area-a-dominant-subordinate-relationship-between-origin-sites-of-bidirectional-ventricular-premature-contractions
#19
Yasuhiro Shirai, Masahiko Goya, Seiko Ohno, Minoru Horie, Shozaburo Doi, Mitsuaki Isobe, Kenzo Hirao
We report on a patient diagnosed with CPVT who underwent catheter ablation of VPCs induced by epinephrine. VPCs were classified roughly into 3 types. Type 1 and Type 2 VPCs (RBBB configuration and inferior axis) were eliminated by radio frequency applications at the left aortic sinus of Valsalva and the anterolateral papillary muscle (APM), respectively. Although no spontaneous VPCs were seen after the elimination of Type 1 and 2 VPCs, pacing resulting in capture at the APM induced type 3 VPC (RBBB configuration and superior axis) reproducibly...
December 24, 2016: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28011827/localization-of-premature-ventricular-contractions-from-the-papillary-muscles-using-the-standard-12-lead-electrocardiogram-a-feasibility-study-using-a-novel-cardiac-isochrone-positioning-system
#20
Peter M van Dam, Noel G Boyle, Michael M Laks, Roderick Tung
AIMS: The precise localization of the site of origin of a premature ventricular contraction (PVC) prior to ablation can facilitate the planning and execution of the electrophysiological procedure. In clinical practice, the targeted ablation site is estimated from the standard 12-lead ECG. The accuracy of this qualitative estimation has limitations, particularly in the localization of PVCs originating from the papillary muscles. Clinical available electrocardiographic imaging (ECGi) techniques that incorporate patient-specific anatomy may improve the localization of these PVCs, but require body surface maps with greater specificity for the epicardium...
December 2016: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
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