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WPW pattern, Ventricular pre-excitation with arrhythmia, auriculoventricular accessory pathway syndrome [1] [2] Conduction through the accessory pathway results in a delta wave. A characteristic "delta wave" (arrow) seen in a person with Wolff–Parkinson–White syndrome. Note the short PR interval. Specialty: Cardiology: Symptoms
This WPW pattern doesn’t typically cause any symptoms and it’s relatively benign. In some cases, however, this pattern can facilitate certain arrhythmias, or basically make certain arrhythmias more severe and potentially even cause sudden cardiac death, in which case it would be called Wolff-Parkinson-White syndrome.
A delta wave is an initial slurred deflection seen in the initial part of an otherwise narrow QRS of a patient at risk for WPW and is an indicator of the presence of an accessory pathway. These beats are a fusion between the conduction down the accessory pathway and the slightly delayed but then-dominant conduction via the AV node.
12 lead electrocardiogram of an individual with Wolff–Parkinson–White syndrome exhibiting 'slurred upstrokes' or 'delta waves' before the QRS complexes. An episode of SVT may present with palpitations, dizziness, shortness of breath, or losing consciousness (fainting). The electrocardiogram (ECG) would appear as a narrow-complex SVT.
[1]. [citation needed] LGL can be distinguished from Wolff–Parkinson–White syndrome syndrome because the delta waves seen in WPW syndrome are not seen in LGL syndrome. The QRS complex is often normal but can also be narrow in LGL syndrome, as opposed to WPW, because ventricular conduction is via the His-Purkinje system.
Brainwave entrainment, also referred to as brainwave synchronization or neural entrainment, refers to the observation that brainwaves (large-scale electrical oscillations in the brain) will naturally synchronize to the rhythm of periodic external stimuli, such as flickering lights, [1] speech, [2] music, [3] or tactile stimuli.
English: An EEG (electroencephalograph) 1 second sample. The signal is filterd to present only the delta waves. The signal is filterd to present only the delta waves. The signal was acquired in the Oz position processed with scipy and saved with matplolib.
Originally, these large waves were observed by Cornelius Vanderwolf in 1969, and later John O'Keefe investigated SPW-Rs in more detail in 1978 while studying the spatial memory of rats. [2] György Buzsáki and his collaborators studied and characterized SWRs in detail and described their physiological functions and role in different states of ...