scholarly journals Proofs of orthoconductive concealed conduction in co-lateral tract of latent WPW syndrome.

1989 ◽  
Vol 9 (2) ◽  
pp. 171-179
Author(s):  
FUMIO SUZUKI
Keyword(s):  
Wpw Syndrome ◽  
Lateral Tract

scholarly journals Accessory pathway analysis using a multimodal deep learning model

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Makoto Nishimori ◽  
Kunihiko Kiuchi ◽  
Kunihiro Nishimura ◽  
Kengo Kusano ◽  
Akihiro Yoshida ◽  
...  
Keyword(s):  
Deep Learning ◽  
Electrophysiological Study ◽  
Accessory Pathway ◽  
Learning Model ◽  
X Rays ◽  
X Ray ◽  
Wpw Syndrome ◽  
Chest X Ray ◽  
Deep Learning Model ◽  
Ecg Data

AbstractCardiac accessory pathways (APs) in Wolff–Parkinson–White (WPW) syndrome are conventionally diagnosed with decision tree algorithms; however, there are problems with clinical usage. We assessed the efficacy of the artificial intelligence model using electrocardiography (ECG) and chest X-rays to identify the location of APs. We retrospectively used ECG and chest X-rays to analyse 206 patients with WPW syndrome. Each AP location was defined by an electrophysiological study and divided into four classifications. We developed a deep learning model to classify AP locations and compared the accuracy with that of conventional algorithms. Moreover, 1519 chest X-ray samples from other datasets were used for prior learning, and the combined chest X-ray image and ECG data were put into the previous model to evaluate whether the accuracy improved. The convolutional neural network (CNN) model using ECG data was significantly more accurate than the conventional tree algorithm. In the multimodal model, which implemented input from the combined ECG and chest X-ray data, the accuracy was significantly improved. Deep learning with a combination of ECG and chest X-ray data could effectively identify the AP location, which may be a novel deep learning model for a multimodal model.

scholarly journals Hypertrophic cardiomyopathy with paroxysmal atrial fibrillation misdiagnosed as WPW syndrome

2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Sang-Hoon Seol ◽  
Ki-Hun Kim ◽  
Jino Park ◽  
Yeo-Jeong Song ◽  
Dong-Kie Kim ◽  
...  
Keyword(s):  
Atrial Fibrillation ◽  
Hypertrophic Cardiomyopathy ◽  
Paroxysmal Atrial Fibrillation ◽  
Conduction System ◽  
Atrioventricular Conduction ◽  
Wpw Syndrome ◽  
Bypass Tract ◽  
Hypertrophied Myocardium

AbstractHypertrophic cardiomyopathy (HCM) is associated with an increased incidence of Wolff–Parkinson–White (WPW) syndrome and atrial fibrillation. However, a delta-like wide QRS can be observed in the hypertrophied myocardium. When considering the rarity of the paraseptal bypass tract (BT), the normal QRS axis suggests a higher possibility of HCM origin. Otherwise, there is no known electrocardiographic clue indicating a wide QRS differentiation between HCM and WPW syndrome. Moreover, the atriofascicular, nodofascicular/ventricular or fasciculoventricular BT should be differentiated. In this case, atrioventricular conduction system incidental injury revealed a wide QRS origin from the HCM, but this method should be avoided except in some selected cases.

Auricular Fibrillation in a Case of Pre-excitation (WPW-Syndrome)

2009 ◽  
Vol 149 (4) ◽  
pp. 261-270 ◽  
Author(s):  
ARNE CARLSTEN ◽  
BÖRJE OLHAGEN ◽  
GUNNAR STRÖM
Keyword(s):  
Wpw Syndrome

scholarly journals Observations on the ciliary currents of the jelly-fish Aurelia aurita L.

1955 ◽  
Vol 34 (2) ◽  
pp. 201-216 ◽  
Author(s):  
A. J. Southward
Keyword(s):  
Morphological Changes ◽  
Aurelia Aurita ◽  
Gastric Cavity ◽  
Larval Stages ◽  
Blind Ending ◽  
Lateral Tract

SUMMARYThe jelly-fish Aurelia aurita possesses external and internal ciliary currents that play a large part in food collection and in the transport of food, reproductive products and excretory matter.Adults feed on relatively small organisms, which are collected in mucus on all external surfaces and eventually passed to the inner surfaces of the oral arms.The inner surfaces of the oral arms bear two ciliated tracts which operate simultaneously in opposite directions. The lateral tract carries food materials proximally towards the gastric pouches, but is capable of rejecting inedible matter. The basal tract carries excretory matter distally, away from the gastric pouches and canals to the exterior.Rejection reactions are also found in the gastric pouches and radial canals, parts of which have currents moving in opposite directions on the roof and on the floor. These opposing currents appear to be derived from the system in the ephyra stage, where the circulation in the wide gastric cavity and blind-ending canals is maintained partly by centripetal currents on the floor and centrifugal currents on the roof.The directions of the main currents remain constant throughout the larval stages to the adult, although slight variations are introduced by morphological changes. The currents also remain the same during spawning, when the eggs and sperm leave the gastric pouches by the normal excretory path.Many of the ciliary currents found in Aurelia are present in other semaeostome and rhizostome medusae, but only in Aurelia do the umbrella surfaces and currents play a large part in food collection.

scholarly journals Clinical and electrophysiological characteristics in Korean patients with WPW syndrome

1998 ◽  
Vol 39 (2) ◽  
pp. 122 ◽  
Author(s):  
Yangsoo Jang ◽  
Shin Ki Ahn ◽  
Moonhoung Lee ◽  
In Suck Choi ◽  
Dong Jin Oh ◽  
...  
Keyword(s):  
Wpw Syndrome ◽  
Korean Patients

Detection of Accessory Pathway in Patients with WPW Syndrome by Means of The Isomagnetic Map and MRI

1989 ◽  
pp. 373-376 ◽  
Author(s):  
Masahiro Nomura ◽  
Yutaka Nakaya ◽  
Katsusuke Watanebe ◽  
Mariko Katayama ◽  
Akemi Takeuchi ◽  
...  
Keyword(s):  
Accessory Pathway ◽  
Wpw Syndrome

Application of a Biomagnetic Multichannel System to the Comparative Localization of Accessory Conduction Pathways in Patients with WPW Syndrome

1989 ◽  
pp. 369-372 ◽  
Author(s):  
K. Abraham-Fuchs ◽  
A. Weikl ◽  
S. Schneider ◽  
W. Moshage ◽  
G. Röhrlein ◽  
...  
Keyword(s):  
Multichannel System ◽  
Wpw Syndrome

scholarly journals Pre-excitation pattern associated with accessory pathway related tachycardia: Case report

2010 ◽  
Vol 138 (9-10) ◽  
pp. 639-642
Author(s):  
Mirko Burazor ◽  
Ivana Burazor ◽  
Nebojsa Mujovic
Keyword(s):  
Ventricular Tachycardia ◽  
Diagnostic Tests ◽  
Accessory Pathway ◽  
Accurate Assessment ◽  
Wpw Syndrome ◽  
Conduction Pathway ◽  
Difficulty Breathing ◽  
Life Threatening ◽  
Mapping Techniques ◽  
Excitation Pattern

Introduction. Pre-excitation is based on an accessory conduction pathway between the atrium and ventricle. The term Wolff- Parkinson-White (WPW) syndrome is used for patients with the pre-excitation/WPW pattern associated with AP-related tachycardia. Case Outline. We present a 52-year-old man with severe palpitation, fatigue, lightheadedness and difficulty breathing. The initial ECG showed tachyarrhythmia with heart rate between 240 and 300/min. He was treated with antiarrhythmics (Digitalis, Verapamil, Lidocaine) with no response. Then, the patient was treated with electrical cardioversion and was referred to our Clinic for further evaluation with the diagnosis: ?Ventricular tachycardia?. During in-hospital stay, the previously undiagnosed WPW pattern had been seen. Additional diagnostic tests confirmed permanent pre-excitacion pattern (ECG Holter recording, exercises test). The patient was referred to an electrophysiologist for further evaluation. Mapping techniques provided an accurate assessment of the position of the accessory pathway which was left lateral. The elimination of the accessory pathway by radiofrequent catheter ablation is highly effective in termination and elimination of tacchyarrhythmias. Conclusion. Symptomatic, life-threatening arrhythmia, first considered as ventricular tachycardia, reflected atrial fibrillation with ventricular pre-excitation over an accessory pathway in a patient with previously undiagnosed WPW syndrome.

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