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Premature ventricular complexes

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https://www.readbyqxmd.com/read/29784483/ectopic-beats-insights-from-timing-and-morphology
#1
REVIEW
Giuseppe Bagliani, Domenico Giovanni Della Rocca, Roberto De Ponti, Alessandro Capucci, Margherita Padeletti, Andrea Natale
Premature complexes are electrical impulses arising from atrial, junctional, or ventricular tissue, leading to premature heart beats. Premature atrial beats are much more frequent than those arising in the atrioventricular junction but less frequent than premature beats from the ventricles. Although they are usually benign and highly prevalent in the general population, they could trigger sustained supraventricular and ventricular arrhythmias, and cause cardiomyopathies. The aim of this article was to review the main electrocardiology features of premature complexes and discuss their implications in clinical practice...
June 2018: Cardiac Electrophysiology Clinics
https://www.readbyqxmd.com/read/29783947/preexcitation-syndrome-experimental-study-on-the-electrocardiogram-of-antegradely-conducting-accessory-pathway
#2
Zhaolong Xu, Renguang Liu, Qinghua Chang, Changjun Li
BACKGROUND: Preexcitation syndrome is characterized by a dominant delta wave on the baseline electrocardiogram (ECG), resulting from the change in QRS initial vector by the accessory pathway (AP). This study is to explore the effect of ventricular preexcitation on the QRS initial, maximal and terminal vector in an experimental rabbit with preexcitation syndrome induced by programmed electrical stimulation. METHODS: Rabbits (n = 10) were randomized for the experimental model of ventricular preexcitation...
May 21, 2018: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/29782689/common-and-distinctive-electrocardiographic-characteristics-and-effective-catheter-ablation-of-idiopathic-ventricular-arrhythmias-originating-from-different-areas-of-ventricular-septum-adjacent-to-atrioventricular-annulus
#3
Su-Qin Zhang, Cheng Zheng, Yue-Chun Li, Kang-Ting Ji, Ri-Peng Yin, Jia-Feng Lin, Jia Li
OBJECTIVE: To investigate electrocardiographic (ECG) characteristics and radiofrequency catheter ablation (RFCA) efficacy for premature ventricular complexes (PVCs) and idiopathic ventricular tachycardias (IVTs) originating from ventricular septum areas adjacent to atrioventricular annulus (VS-AVA). METHODS: Among 1505 consecutive PVCs/IVTs cases, 106 (7.04%) were confirmed as origin of VS-AVA guided by both fluoroscopy and three-dimensional mapping system during RFCA...
May 21, 2018: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/29779522/sinus-tachycardia-presenting-as-a-wide-and-narrow-complex-tachyarrhythmia-what-is-the-link
#4
Chenni S Sriram, Mario D Gonzalez
We describe a neonate that developed alternating wide and narrow complex tachycardias following heart surgery for congenital heart defect. Although the etiology was sinus tachycardia, a premature atrial complex initiated aberrancy due to phase 3 block that was perpetuated due to 'linking' at similar or even slower heart rates. Similarly, there was abrupt transition from wide to narrow complex tachycardia following a premature ventricular complex without a change in subsequent heart rate. This was explained by interruption of linking phenomenon by premature ventricular activation...
May 2018: Journal of Electrocardiology
https://www.readbyqxmd.com/read/29778240/the-autonomic-neural-mechanism-of-right-ventricular-outflow-tract-tachycardia
#5
Hung-Yu Chang, Li-Wei Lo, Yu-Ruey Chen, Yu-Hui Chou, Wei-Lun Lin, Yenn-Jiang Lin, Wei-Hsian Yin, An-Ning Feng, Shih-Ann Chen
BACKGROUND: Ventricular tachycardia (VT) and ventricular premature complexes (VPCs) originating from the right ventricular outflow tract (RVOT) are generally considered as benign arrhythmias, with ECG morphology showing LBBB pattern and inferior axis. Pathogenic mechanisms in the genesis of RVOT VT/VPC remain largely unknown. We aimed to investigate the neural mechanism in RVOT ventricular arrhythmias in canine model. METHODS: Twelve mongrel dogs (13.7 ± 1...
July 2018: Autonomic Neuroscience: Basic & Clinical
https://www.readbyqxmd.com/read/29774304/arrhythmogenic-right-ventricular-cardiomyopathy-in-boxer-dogs-the-diagnosis-as-a-link-to-the-human-disease
#6
Annina S Vischer, David J Connolly, Caroline J Coats, Virginia Luis Fuentes, William J McKenna, Silvia Castelletti, Antonios A Pantazis
Background: Arrhythmogenic right ventricular cardiomyopathy (ARVC) is a myocardial disease with an increased risk for ventricular arrhythmias. The condition, which occurs in Boxer dogs, shares phenotypic features with the human disease arrhythmogenic cardiomyopathy (ACM) suggesting its potential as a natural animal model. However, there are currently no universally accepted clinical criteria to diagnose ARVC in Boxer dogs. We aimed to identify diagnostic criteria for ARVC in Boxer dogs defining a more uniform and consistent phenotype...
September 2017: Acta Myologica: Myopathies and Cardiomyopathies: Official Journal of the Mediterranean Society of Myology
https://www.readbyqxmd.com/read/29759837/clinical-features-and-sites-of-ablation-for-patients-with-incessant-supraventricular-tachycardia-from-concealed-nodofascicular-and-nodoventricular-tachycardias
#7
Frederick T Han, Eric M Riles, Nitish Badhwar, Melvin M Scheinman
OBJECTIVES: This study sought to describe the clinical features and sites of successful ablation for incessant nodofascicular (NF) and nodoventricular (NV) tachycardias. BACKGROUND: Incessant supraventricular tachycardias have been associated with tachycardia-induced cardiomyopathies and have been previously attributed to permanent junctional reciprocating tachycardias, atrial tachycardias, and atrioventricular nodal re-entrant tachycardias. Incessant concealed NF and NV tachycardias have not been described previously...
December 26, 2017: JACC. Clinical Electrophysiology
https://www.readbyqxmd.com/read/29759536/value-of-a-posterior-electrocardiographic-lead-for-localization-of-ventricular-outflow-tract-arrhythmias-the-v-4-v-8-ratio
#8
Fengxiang Zhang, David Hamon, Zhen Fang, Yan Xu, Bing Yang, Weizhu Ju, Jason Bradfield, Kalyanam Shivkumar, Minglong Chen, Roderick Tung
OBJECTIVES: This study sought to prospectively evaluate the value of a dedicated electrocardiographic posterior lead to create an anteroposterior ratio to localize premature ventricular complexes (PVCs) between the right ventricular outflow tract and left ventricular outflow tract for catheter ablation. BACKGROUND: The anteroposterior relationship between the right and left outflow tract has not been explored for electrocardiographic localization of ventricular arrhythmia...
July 2017: JACC. Clinical Electrophysiology
https://www.readbyqxmd.com/read/29745607/-characteristics-of-the-inferior-wall-hypertrophy-in-hypertrophic-cardiomyopathy-patients-with-contrast-echocardiography
#9
Zhiyue Liu, Wen Zhang, Xianchao Jing, Lei Xiao, He Huang
We tried to explore the value of contrast echocardiography (CEcho) on evaluating hypertrophic cardiomyopathy (HCM) with the inferior wall hypertrophy. A total of 114 patients with HCM were investigated. All the patients received CEcho and routine echocardiography (Echo), and 45 of them received cardiac magnetic resonance (CMR) and 47 of them received Holter. The frequency and percentage of inferior wall hypertrophy were analyzed in HCM patients, as well as the structure and function. The results showed that: (1) Inferior wall hypertrophy was detected in 55 patients (48%) by Echo, while 68 patients (60%) by CEcho...
February 1, 2018: Sheng Wu Yi Xue Gong Cheng Xue za Zhi, Journal of Biomedical Engineering, Shengwu Yixue Gongchengxue Zazhi
https://www.readbyqxmd.com/read/29745596/-extraction-and-recognition-of-attractors-in-three-dimensional-lorenz-plot
#10
Min Hu, Chengfan Jang, Suxia Wang
Lorenz plot (LP) method which gives a global view of long-time electrocardiogram signals, is an efficient simple visualization tool to analyze cardiac arrhythmias, and the morphologies and positions of the extracted attractors may reveal the underlying mechanisms of the onset and termination of arrhythmias. But automatic diagnosis is still impossible because it is lack of the method of extracting attractors by now. We presented here a methodology of attractor extraction and recognition based upon homogeneously statistical properties of the location parameters of scatter points in three dimensional LP (3DLP), which was constructed by three successive RR intervals as X , Y and Z axis in Cartesian coordinate system...
February 1, 2018: Sheng Wu Yi Xue Gong Cheng Xue za Zhi, Journal of Biomedical Engineering, Shengwu Yixue Gongchengxue Zazhi
https://www.readbyqxmd.com/read/29722855/clinical-research-remote-magnetic-navigation-vs-manually-controlled-catheter-ablation-of-right-ventricular-outflow-tract-arrhythmias-a-retrospective-study
#11
Ayelet Shauer, Lennart J De Vries, Ferdi Akca, Jorge Palazzolo, Mohammed Shurrab, Ilan Lashevsky, Irving Tiong, Sheldon M Singh, David Newman, Tamas Szili-Torok, Eugene Crystal
Aims: Remote magnetic navigation (RMN) is an alternative to manual catheter control (MCC) radiofrequency ablation of right ventricular outflow tract (RVOT) arrhythmias. The data to support RMN approach is limited. We aimed to investigate the clinical and procedural outcomes in a cohort of patients undergoing RVOT premature ventricular complex/ventricular tachycardia (PVCs/VT) ablation procedures using RMN vs. MCC. Methods and results: Data was collected from two centres...
May 1, 2018: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/29716710/catheter-ablation-for-electrical-storm-in-brugada-syndrome-results-of-substrate-based-ablation
#12
Abhijeet Shelke, Ajit Tachil, Daljeet Saggu, Masilamani Lawrance Jesuraj, Sachin Yalagudri, Calambur Narasimhan
BACKGROUND: Brugada syndrome (BrS) is known to cause malignant ventricular arrhythmia (VA) and sudden cardiac death (SCD). Patients with implantable cardioverter defibrillator (ICD) may experience recurrent shocks from ICD. Recent reports indicate that radiofrequency ablation (RFA) in BrS is feasible, and effective. Catheter ablation of premature ventricular complexes (PVCs) triggering VA and substrate modification of right ventricular outflow tract (RVOT) has been described. METHODS AND RESULTS: Five patients (4 males, age-23 to 32 years) with BrS and electrical storm (ES) despite being on isoprenaline infusion and cilostazol (phosphodiestrase-3 inhibitor) underwent 3 dimensional electroanatomic mapping and RFA...
March 2018: Indian Heart Journal
https://www.readbyqxmd.com/read/29681423/ultrasonic-cavitation-enabled-treatment-for-therapy-of-hypertrophic-cardiomyopathy-proof-of-principle
#13
Douglas L Miller, Xiaofang Lu, Chunyan Dou, Yiying I Zhu, Rachael Fuller, Kristina Fields, Mario L Fabiilli, Gabe E Owens, David Gordon, Oliver D Kripfgans
Ultrasound myocardial cavitation-enabled treatment was applied to the SS-16BN rat model of hypertrophic cardiomyopathy for proof of the principle underlying myocardial reduction therapy. A focused ultrasound transducer was targeted using 10-MHz imaging (10 S, GE Vivid 7) to the left ventricular wall of anesthetized rats in a warmed water bath. Pulse bursts of 4-MPa peak rarefactional pressure amplitude were intermittently triggered 1:8 heartbeats during a 10-min infusion of a microbubble suspension. Methylprednisolone was given to reduce initial inflammation, and Losartan was given to reduce fibrosis in the healing tissue...
April 19, 2018: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/29657597/successful-catheter-ablation-of-ventricular-premature-complexes-from-the-right-atrial-side-of-the-atrioventricular-septum-with-good-contact-force
#14
Marina Arai, Seiji Fukamizu, Iwanari Kawamura, Satoshi Miyazawa, Rintaro Hojo, Harumizu Sakurada, Masayasu Hiraoka
The acquisition of good contact force for radiofrequency catheter ablation of ventricular premature complexes (VPCs) originating from the basal septum of the left ventricle (LV) is often difficult. We describe a case of VPCs originating from the basal septum of the LV, which were successfully eliminated by applying radiofrequency at the right atrium (RA) side of the atrioventricular septum (AVS) without causing any significant impairment of atrioventricular conduction because the ablation catheter could obtain better contact force through the RA approach...
April 2018: Journal of Arrhythmia
https://www.readbyqxmd.com/read/29652656/electrocardiogram-abnormalities-related-to-anti-malarials-in-systemic-lupus-erythematosus
#15
Taneisha K McGhie, Paula Harvey, Jiandong Su, Nicole Anderson, George Tomlinson, Zahi Touma
OBJECTIVES: Cardiotoxicity with potential conduction/structural abnormalities on electrocardiogram (ECG) have been reported with anti-malarial (AM). We aimed to study whether cumulative AM is associated with ECG abnormalities. METHODS: A standard resting supine ECG was performed on consecutive patients attending the Lupus Clinic since 2012. ECG abnormalities were grouped into structural [left ventricular hypertrophy or atrial enlargement] and conduction abnormalities [prolonged corrected QT interval (QTc), short PR interval, left bundle branch block (LBBB), right bundle branch block (RBBB) and atrioventricular block (AVB), bradycardia, tachycardia, premature atrial complex, ectopic atrial rhythm, atrial fibrillation, premature ventricular complex and ventricular bigeminy]...
April 13, 2018: Clinical and Experimental Rheumatology
https://www.readbyqxmd.com/read/29643701/higher-ventricular-premature-complex-burden-is-associated-with-lower-systolic-blood-pressure-response
#16
Jing-Wei Kang, Wei-Hsiang Yang, Jia-En Chi, Wei-Ta Chen
Background: Ventricular premature complexes (VPCs) with a burden higher than 10% to 20% of total daily heart beats can cause VPC-induced cardiomyopathy. The systolic blood pressure response (SBPR) is the difference between the SBP during maximal exercise and rest. A low SBPR was recently identified to be a marker of cardiomyopathy. The aim of this manuscript was to clarify the association between VPC burden and SBPR. Methods: From January to December 2015, all patients with a VPC burden larger than 240 beats/day on Holter recordings and treadmill exercise tests were enrolled...
March 2018: Acta Cardiologica Sinica
https://www.readbyqxmd.com/read/29625195/idiopathic-premature-ventricular-complexes-originating-from-the-distal-great-cardiac-vein-clinical-cardiac-and-electrophysiological-characteristics-and-catheter-ablation-outcome
#17
Wenkui Lv, Xianhui Zhou, Gulinuer Yiming, Ling Zhang, Qina Zhou, Yaodong Li, Qiang Xing, Jianghua Zhang, Yanmei Lu, Hongli Wang, Guiqiu Cao, Baopeng Tang
AIMS: Although catheter ablation for idiopathic ventricular arrhythmia (VA) has been generally well-established, VA originating from the great cardiac vein (GCV) may be clinically challenging due to its epicardial origin, proximity to coronary arteries and limited accessibility. The purpose of this study was to explore its electrophysiological characteristics and identify effective mapping/ablation strategies for idiopathic premature ventricular complexes (PVCs) originating from the GCV...
April 3, 2018: Life Sciences
https://www.readbyqxmd.com/read/29610596/catecholaminergic-polymorphic-ventricular-tachycardia-looking-to-the-future
#18
Andreea Elena Velcea, Calin Siliste, Dragos Vinereanu
Catecholaminergic polymorphic ventricular tachycardia (CPVT) is a rare inheritable cardiac disorder, characterized by polymorphic ventricular tachycardia (PVT) or bidirectional ventricular tachycardia, triggered by adrenergic stress, and manifested most frequently as syncope or sudden cardiac death. The disease has a heterogeneous genetic basis, with mutations in the genes encoding the ryanodine and calsequestrin channels accounting for the majority of cases. The diagnosis of CPVT is established in individuals with polymorphic ventricular premature beats, PVT or bidirectional ventricular tachycardia documented during exercise or adrenergic stress, who have a structurally normal heart and normal resting ECG...
December 2017: Mædica
https://www.readbyqxmd.com/read/29600967/ventricular-fibrillation-induced-by-radiofrequency-energy-delivery-for-premature-ventricular-contractions-arising-from-the-right-ventricular-outflow-tract-is-implantablecardioverterdefibrillator-indicated
#19
Michał Orczykowski, Paweł Derejko, Piotr Urbanek, Robert Bodalski, Radosław Lenarczyk, Dariusz Kozłowski, Edward Koźluk, Damian Łasocha, Maciej Sterliński, Zbigniew Kalarus, Maria Bilińska, Łukasz Szumowski
INTRODUCTION    Inadvertently induced ventricular fibrillation (VF) by radiofrequency (RF) energy delivery for premature ventricular complexes (PVCs) is a rare phenomenon; nevertheless, it is crucial to assess long‑term risk of sudden cardiac death in these patients. OBJECTIVES    The aim of our study was to define the long‑term prognosis in patients with normal ejection fraction (EF), in whom VF was inadvertently induced by RF energy application during ablation of symptomatic idiopathic PVCs originating from the right ventricular outflow tract (RVOT)...
March 29, 2018: Polish Archives of Internal Medicine
https://www.readbyqxmd.com/read/29595391/ambulatory-electrocardiographic-evaluation-of-the-occurrence-of-arrhythmias-in-healthy-salukis
#20
Robert A Sanders, Tsumugi Anne Kurosawa, Mary Dee Sist
OBJECTIVE To determine the frequency and complexity of ventricular arrhythmias in a group of healthy Salukis evaluated by means of continuous Holter monitoring for 7 days. DESIGN Prospective case series. ANIMALS 25 healthy Salukis > 18 months old. PROCEDURES In all dogs, a history was obtained and a physical examination and transthoracic echocardiography were performed to verify the absence of structural cardiac disease. Dogs then underwent Holter monitoring for 7 days. Data recorded included heart rate parameters and the occurrence of conduction disturbances, ventricular premature complexes, ventricular couplets, ventricular triplets, ventricular bigeminy, ventricular trigeminy, and ventricular tachycardia...
April 15, 2018: Journal of the American Veterinary Medical Association
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