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Find video protocols related to scientific articles indexed in Pubmed.
Ablation of epicardial ganglionated plexi increases atrial vulnerability to arrhythmias in dogs.
Circ Arrhythm Electrophysiol
PUBLISHED: 05-23-2014
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Previous studies have suggested that systematic ablation of ganglionated plexi (GP) could increase the short-term success rate of radiofrequency ablation for atrial fibrillation, but the long-term efficacy of this approach is not fully established.
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Electrophysiological characteristics of left atrial diverticulum in patients with atrial fibrillation: electrograms, impedance and clinical implications.
Int. J. Cardiol.
PUBLISHED: 03-30-2014
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Left atrial diverticulum (LAD) is not rare in patients with atrial fibrillation (AF). Recent reports focused on its morphology however data on its electrophysiological characteristics are lacking. Our study aims to investigate the electrogram and impedance features of LAD.
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Flood disaster risk assessment of rural housings--a case study of Kouqian Town in China.
Int J Environ Res Public Health
PUBLISHED: 03-10-2014
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Floods are a devastating kind of natural disaster. About half of the population in China lives in rural areas. Therefore, it is necessary to assess the flood disaster risk of rural housings. The results are valuable for guiding the rescue and relief goods layout. In this study, we take the severe flood disaster that happened at Kouqian Town in Jilin, China in 2010 as an example to build an risk assessment system for flood disaster on rural housings. Based on the theory of natural disaster risk formation and "3S" technology (remote sensing, geography information systems and global positioning systems), taking the rural housing as the bearing body, we assess the flood disaster risk from three aspects: hazard, exposure and vulnerability. The hazard presented as the flood submerging range and depth. The exposure presented as the values of the housing and the property in it. The vulnerability presented as the relationship between the losses caused by flood and flood depth. We validate the model by the field survey after the flood disaster. The risk assessment results highly coincide with the field survey losses. This model can be used to assess the risk of other flood events in this area.
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J wave is associated with increased risk of sudden cardiac arrest in patients with hypertrophic cardiomyopathy.
J. Int. Med. Res.
PUBLISHED: 07-18-2013
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A retrospective, case-control study to investigate the J wave, a J-point elevation on resting 12-lead electrocardiograms, as a risk factor for sudden cardiac arrest (SCA) in patients diagnosed with hypertrophic cardiomyopathy (HCM).
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Stress-induced hyperglycemia after hip fracture and the increased risk of acute myocardial infarction in nondiabetic patients.
Diabetes Care
PUBLISHED: 07-11-2013
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To investigate the risk of acute myocardial infarction (AMI) following stress hyperglycemia after hip fracture.
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Preprocedural clinical parameters determining perimitral conduction time during mitral isthmus line ablation.
Circ Arrhythm Electrophysiol
PUBLISHED: 03-03-2011
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Achievement of complete conduction block across left mitral isthmus (MI) is challenging. Anticipation of perimitral conduction time (PMCT) associated with MI block may expedite this procedure. We evaluated the relationship between the preprocedural variables and the quantum of PMCT in patients with bidirectionally blocked MI.
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Impact of patent foramen ovale on left atrial linear lesions in the context of atrial fibrillation ablation.
J. Cardiovasc. Electrophysiol.
PUBLISHED: 02-02-2011
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We investigated the impact of the mode of left atrial (LA) access via patent foramen ovale (PFO) versus transseptal (TS) puncture on LA linear lesions during atrial fibrillation (AF) ablation.
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Early temporal and spatial regularization of persistent atrial fibrillation predicts termination and arrhythmia-free outcome.
Heart Rhythm
PUBLISHED: 01-21-2011
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Termination of persistent atrial fibrillation (AF) is a valuable ablation endpoint but is difficult to anticipate. We evaluated whether temporal and spatial indices of AF regularization predict intraprocedural AF termination and outcome.
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Initial results of efficacy of left linear ablation using a novel simultaneous multielectrode ablation catheter.
J. Cardiovasc. Electrophysiol.
PUBLISHED: 01-15-2011
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Creating complete linear block with point-by-point ablation is challenging in the left atrium (LA). The purpose of this study was to evaluate the efficacy of LA linear ablation using a hexapolar linear multielectrode mapping/ablation catheter.
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Remote magnetic navigation with irrigated tip catheter for ablation of paroxysmal atrial fibrillation.
Circ Arrhythm Electrophysiol
PUBLISHED: 10-11-2010
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The remote magnetic navigation system (MNS) has been used with a nonirrigated magnetic catheter for atrial fibrillation (AF) ablation. The objective of this study was to evaluate the feasibility and efficiency of the newly available irrigated tip magnetic catheter for index pulmonary vein isolation (PVI) in patients with paroxysmal AF (PAF).
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Management of atrial fibrillation.
Discov Med
PUBLISHED: 09-30-2010
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Atrial fibrillation (AF) is the most common heart rhythm problem and a leading cause of morbidity and mortality. Serious complications associated with this disorder include cardioembolic stroke, heart failure, and death. The worldwide prevalence of AF is rapidly increasing owing to aging of the population. Abnormal impulse formation in the pulmonary veins is known to trigger paroxysmal AF and radiofrequency isolation of these veins is recommended in drug-refractory AF. Active pharmacological research is directed towards selectively targeting the culprit venous cells. Persistent AF is more likely to be an atrial disease. Intrinsic and extrinsic stressors are believed to cause electrostructural alterations in the atrial tissue leading to profibrillatory state. Further research will elucidate the role of stressors and help develop biomarkers to guide early management of AF. An ideal therapy for AF aims at prevention of onset and progression of AF and reduction of AF-related symptoms, hospitalization, stroke, and mortality.
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Early management of atrial fibrillation: from imaging to drugs to ablation.
Nat Rev Cardiol
PUBLISHED: 04-27-2010
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Atrial fibrillation (AF) is the most common cardiac arrhythmia, and is responsible for the highest number of rhythm-related disorders and cardioembolic strokes worldwide. Early management of this condition will lower the risk of AF-associated morbidity and mortality. Targeted drug therapy has an important role in preventing the progression of AF through modification of the substrate. Discovery of the role of pulmonary veins as a trigger has been an important breakthrough, leading to the development of pulmonary vein ablation-an established curative therapy for drug-resistant AF. Identifying the underlying reasons for the abnormal firing of venous cardiomyocytes and the widespread progressive alterations of atrial tissue found in persistent AF are challenges for the future. Novel imaging techniques may help to determine the right time for intervention, provide specific targets for ablation, and judge the efficacy of treatment. If new developments can successfully address these issues, the knowledge acquired as a result will have a vital role in preclinical and early management of AF.
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Ablation of ligament of Marshall attenuates atrial vulnerability to fibrillation induced by inferior left atrial fat pad stimulation in dogs.
J. Cardiovasc. Electrophysiol.
PUBLISHED: 04-07-2010
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The role of ligament of Marshall (LOM) in the mechanism of "vagal" atrial fibrillation (AF) is still unknown.
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Atrial tachycardia arising adjacent to noncoronary aortic sinus: distinctive atrial activation patterns and anatomic insights.
J. Am. Coll. Cardiol.
PUBLISHED: 02-26-2010
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We sought to determine whether atrial tachycardia arising adjacent to the noncoronary aortic sinus (NCAS-AT) has distinctive atrial activation patterns in relation to targeted anatomic imaging.
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Implementation of a novel interpolating method to epicardial potential mapping for atrial fibrillation study.
Comput. Biol. Med.
PUBLISHED: 02-25-2010
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Epicardial potential mapping is an efficient way to visualize the potential distribution on the epicardial surface. We found in our previous study, that the traditional linear interpolation used for the epicardial mapping may cause errors and distortions in reconstruction of the electric activities on the epicardial surface especially during the atrial fibrillation. In this study, we devoted on the implementation of a 3D interpolating method, and verified it in comparison with another interpolating method as well as studying of the mechanism of vagal atrial fibrillation (AF). In case studying, we analyzed the epicardial data from seven canine cardiac models using this method and found the macro-re-entry during the sustainable AF is more likely due to the dispersion of refractoriness in the myocardium and does not demonstrated the focal patterns at the beginning of AF. This indicated that the electrophysiological characteristics of myocardium might have been changed during the paroxysmal atrial fibrillation (PAF).
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Atrial tachycardias arising from ablation of atrial fibrillation: a proarrhythmic bump or an antiarrhythmic turn?
Cardiol Res Pract
PUBLISHED: 02-02-2010
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The occurrence of atrial tachycardias (AT) is a direct function of the volume of atrial tissue ablated in the patients with atrial fibrillation (AF). Thus, the incidence of AT is highest in persistent AF patients undergoing stepwise ablation using the strategic combination of pulmonary vein isolation, electrogram based ablation and left atrial linear ablation. Using deductive mapping strategy, AT can be divided into three clinical categories viz. the macroreentry, the focal and the newly described localized reentry all of which are amenable to catheter ablation with success rate of 95%. Perimitral, roof dependent and cavotricuspid isthmus dependent AT involve large reentrant circuits which can be successfully ablated at the left mitral isthmus, left atrial roof and tricuspid isthmus respectively. Complete bidirectional block across the sites of linear ablation is a necessary endpoint. Focal and localized reentrant AT commonly originate from but are not limited to the septum, posteroinferior left atrium, venous ostia, base of the left atrial appendage and left mitral isthmus and they respond quickly to focal ablation. AT not only represents ablation-induced proarrhythmia but also forms a bridge between AF and sinus rhythm in longstanding AF patients treated successfully with catheter ablation.
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A new method to evaluate linear block at the left atrial roof: is it reliable without pacing?
J. Cardiovasc. Electrophysiol.
PUBLISHED: 01-22-2010
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The present study aimed to evaluate a new method for validation of complete linear block at the left atrial (LA) roof.
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Mechanisms of arrhythmia recurrence after video-assisted thoracoscopic surgery for the treatment of atrial fibrillation: insights from electrophysiological mapping and ablation.
J. Cardiovasc. Electrophysiol.
PUBLISHED: 10-08-2009
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Video-assisted thoracoscopic bilateral pulmonary vein (PV) isolation with left atrial appendage (LAA) excision is a novel surgical treatment for patients who have atrial fibrillation (AF) but no indication for open heart surgery. However, the electrophysiological mechanisms of the recurrent atrial tachyarrhythmias after this procedure are unknown.
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Angiotensin-converting enzyme inhibitors and angiotensin II receptor blockers have no beneficial effect on ablation outcome in chronic persistent atrial fibrillation.
Acta Cardiol
PUBLISHED: 07-15-2009
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Previous studies have shown that angiotensin-converting enzyme inhibitors (ACEIs) and angiotensin II receptor blockers (ARBs) could reverse structural and electrical atria remodelling and decrease atrial fibrillation (AF) onset or recurrence. The aim of this retrospective study was to investigate whether ACEIs/ARBs had beneficial effects on ablation outcome of chronic persistent AF.
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Single-catheter technique for pulmonary vein antrum isolation: is it sufficient to identify and close the residual gaps without a circular mapping catheter?
J. Cardiovasc. Electrophysiol.
PUBLISHED: 01-30-2009
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The present study was designed to investigate the feasibility and efficacy of single ablation catheter for complete circumferential pulmonary vein antrum (PVA) isolation.
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Mutations of plakophilin-2 in Chinese with arrhythmogenic right ventricular dysplasia/cardiomyopathy.
Am. J. Cardiol.
PUBLISHED: 01-21-2009
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Arrhythmogenic right ventricular dysplasia/cardiomyopathy (ARVD/C) is an inherited heart muscle disease associated with increased risks of sudden death, particularly in young, otherwise healthy, patients. The pathologic features are progressive myocardial atrophy and fibrofatty replacement. Plakophilin-2 (PKP2) is reported as the most common ARVD/C-causing gene in Western countries. In this study we aimed to determine the prevalence of PKP2 mutations in Chinese patients with ARVD/C and their phenotype characteristics. Genotype and phenotype were investigated in a cohort of 18 unrelated Chinese patients with a clinical diagnosis of ARVD/C. Direct sequencing of PKP2 led to the identification of 5 novel heterozygous mutations (R158K, Q211X, L419S, A793D, and N852fsX930) in 39% of patients (7 of 18) with ARVD/C. Among them, N852fsX930 was found in 3 unrelated young patients who presented with symptomatic ventricular tachyarrhythmia. Nevertheless, no significant difference could be detected between patients with ARVD/C with (n = 7) and without (n = 11) PKP2 mutations with regard to the phenotype characteristics and clinical outcomes. Decreased penetrance was prominent in family members. In conclusion, 5 novel PKP2 mutations were identified in a cohort of symptomatic Chinese patients with ARVD/C. N852fsX930 appeared to be a hot-spot mutation in which patients presented with a severe ARVD/C phenotype, and 2/3 had early onset of arrhythmic events. No significant difference was found in phenotype characteristics between patients with ARVD/C with and without PKP2 mutations. The decreased penetrance indicated that an ARVD/C diagnosis cannot solely rely on genotyping results.
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Prevalence and types of pitfall in the assessment of mitral isthmus linear conduction block.
Circ Arrhythm Electrophysiol
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To identify and understand clinically encountered pitfalls in the assessment of transmitral conduction block using differential coronary sinus and left atrial appendage pacing techniques in patients with left mitral isthmus linear ablation.
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Scenario simulation-based assessment of trip difficulty for urban residents under rainstorm waterlogging.
Int J Environ Res Public Health
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In this study, an experiment was performed to assess the trip difficulty for urban residents of different age groups walking in various depths of water, and the data were corroborated with the real urban rainstorm waterlogging scenarios in downtown (Daoli district) Ha-Erbin (China). Mathematical models of urban rainstorm waterlogging were constructed using scenario simulation methods, aided by the GIS spatial analysis technology and hydrodynamic analysis of the waterway systems in the study area. Then these models were used to evaluate the impact of waterlogging on the safety of residents walking in the affected area. Results are summarized as: (1) for an urban rainstorm waterlogging scenario reoccurring once every 10 years, three grid regions would have waterlogging above 0.5 m moving at a velocity of 1.5 m/s. Under this scenario, waterlogging would accumulate on traffic roads only in small areas, affecting the safety and mobility of residents walking in the neighborhood; (2) for an urban rainstorm waterlogging scenario reoccurring once every 20 years, 13 grids experienced the same waterlogging situation affecting a larger area of the city; (3) for an urban rainstorm waterlogging scenario reoccurring once every 50 years, 86 grid regions were affected (waterlogging above 0.5 m moving at 1.5 m/s), and those areas would become impassable for residents.
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What is Visualize?

JoVE Visualize is a tool created to match the last 5 years of PubMed publications to methods in JoVE's video library.

How does it work?

We use abstracts found on PubMed and match them to JoVE videos to create a list of 10 to 30 related methods videos.

Video X seems to be unrelated to Abstract Y...

In developing our video relationships, we compare around 5 million PubMed articles to our library of over 4,500 methods videos. In some cases the language used in the PubMed abstracts makes matching that content to a JoVE video difficult. In other cases, there happens not to be any content in our video library that is relevant to the topic of a given abstract. In these cases, our algorithms are trying their best to display videos with relevant content, which can sometimes result in matched videos with only a slight relation.