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The QT interval represents the duration of activation and recovery of the ventricular myocardium. Prolonged recovery from electrical excitation increases the likelihood of dispersing refractoriness, when some parts of myocardium might be refractory to subsequent depolarization.
Little is known about the mechanisms underlying metabolic peripheral neuropathy. As stated above, metabolic impairment causes demyelination or axonal degeneration.
Prior to the discovery of the specific gene defect in SJS, the syndrome’s similarity to myotonic disorders provoked speculation that a muscle ion channel abnormality or a muscle enzyme defect might underlie this condition. The fact that a defect exists in the gene for perlecan, a heparin sulfate proteoglycan that is the major proteoglycan of basement membranes and is present in cartilage, supports the general concept of a membrane abnormality and the presence of dysmorphic features. However, precise knowledge as to why abnormal electrical discharges occur is still lacking.
Mitral valve prolapse
Postural Orthostatic Tachycardia Syndrome
Spinal Cord Injury
Striatonigral degeneration is a sporadic, progressive neurodegenerative disorder that represents one manifestation of multiple system atrophy (MSA).
HSE is the most common form of encephalitis in the United States (see Herpes Simplex Encephalitis ). Human herpesvirus (HHV)-6, the causative agent of exanthema subitum, has been associated with a wide spectrum of neurologic complications, including viral (focal) encephalitis.
Chronic Fatigue Syndrome
Generalized Anxiety Disorder
Temporomandibular joint and muscle disorders (TMJ disorders) are problems or symptoms of the chewing muscles and joints that connect your lower jaw to your skull.
Premenstrual dysphoric disorder (PMDD) is a condition in which a woman has severe depression symptoms, irritability, and tension before menstruation. The symptoms of PMDD are more severe than those seen with premenstrual syndrome (PMS) .