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Psychological Rehabilitation of COVID-19
Published in Wenguang Xia, Xiaolin Huang, Rehabilitation from COVID-19, 2021
Physiological and psychological assessments can provide much information about the individual’s physical response to a given situation. For example, an electrocardiogram (ECG) measures various stress-related levels that affect cardiovascular system conditions; an electromyographic scanner measures the level of electrical activity in muscles, evaluates and treats tension-related disorders. Other instruments, such as electroencephalogram (EEG) and event-related potentials (ERPs), detect changes in the brain’s electrical activity. EEG activity, for example, reflects an individual’s alertness, rest, sleep, or dreaming, as well as specific brain wave patterns when the individual is engaged in specific mental tasks. ERPs can reflect the brain’s electrophysiological changes under different stress stages to evaluate the human cognitive process.
General anaesthesia
Published in Roy Palmer, Diana Wetherill, Medicine for Lawyers, 2020
Cardiorespiratory status must be considered when planning anaesthetic care. It is sensible to arrange an electrocardiograph for any patient with cardiac symptoms, such as an irregular pulse, angina or hypertension, but also for those aged over 55 years. Evidence of a previous but ‘silent’ myocardial infarction will indicate a need for careful monitoring and special caution to be taken in order to prevent variations in blood pressure and to ensure the maintenance of a stable cardiac output. The chest examination or a history of chronic respiratory disease, such as emphysema, chronic bronchitis or severe asthmatic disease, may indicate the need for a chest X-ray and pulmonary function studies.
Bioelectric and Biomagnetic Signal Analysis
Published in Arvind Kumar Bansal, Javed Iqbal Khan, S. Kaisar Alam, Introduction to Computational Health Informatics, 2019
Arvind Kumar Bansal, Javed Iqbal Khan, S. Kaisar Alam
An electrocardiograph is a surface level measurement of the cumulative effect of ionic electrical activities in the heart cells that cause a heart to contract and relax. The two activities are called depolarization and repolarization. Depolarization causes cell-contraction, and repolarization brings the cells back to the original relaxed form. Depolarization is caused by the migration of excessive positive ions: Na+ and Ca++ inside the cell, and repolarization is caused by the removal of excess positive ions from the cells.
Impact of biomimetic electrical stimulation combined with Femoston on pregnancy rate and endometrium characteristics in infertility patients with thin endometrium: a prospective observational study
Published in Gynecological Endocrinology, 2023
Yilinuer Shabiti, Shaadaiti Wufuer, Remila Tuohuti, Tan Yun, Jing Lu
Bioelectricity is a kind of physicochemical change in life activities, a basic feature of living organisms, and a manifestation of normal physiological activities. Electrophysiology has developed rapidly in different disciplines in recent years. Electrophysiology research can help understand the functional status of the body. It can be used to diagnose diseases (e.g. electrocardiogram), but it can also help intervene for function regulation intervention, and it is possible to use it for disease prevention and treatment clinically. Biomimetic electrical stimulation acts on pelvic floor muscles and nerves through low-frequency currents, promotes lymphatic and blood circulation by stimulating the nerve-muscle-visceral reflex axis, improves endometrial blood flow and tissue nutrition, accelerates the healing of damaged tissue, and promotes endometrial repair [23,24]. A study enrolled 41 patients with a thin endometrium (≤ 7 mm) and undergoing assisted reproductive technology; they received intermittent vaginal electrical stimulation for 20–30 min on treatment days. The results showed that pelvic floor nerve stimulation significantly increased uterine endometrial thickness in patients with a thin endometrium [14]. By stimulating the repeated contraction and relaxation of uterine smooth muscle, the blood supply to the entire endometrial and subendometrial region can be increased, resulting in better nourishment of the endometrial tissues [14].
Myasthenic crisis as an initial presentation of myasthenia gravis in an 81-year-old following endoscopic myotomy for Zenker’s diverticulum
Published in Baylor University Medical Center Proceedings, 2023
Daniel Tran, Lucas Fair, Bryana Baginski, Bola Aladegbami, Steven Leeds, Marc Ward
In patients presenting in myasthenic crisis, airway support is paramount for optimal outcomes. Patients with appropriate mentation and secretion management may be candidates for noninvasive positive pressure ventilation or bilevel positive airway pressure. Intubation can be performed if necessary, and decisions regarding this are similar to those for other critically ill patients. Once a patient with myasthenic crisis is stabilized, further evaluation can be performed to evaluate for triggers. Infectious evaluation may include a chest radiograph, complete blood count, urinalysis, and blood cultures. As metabolic abnormalities can result in crisis, electrolyte levels and thyroid function tests should be checked. Pregnancy can precipitate crisis, and beta-human chorionic gonadotropin levels should be obtained in females of childbearing age. Creatinine kinase levels can be measured to evaluate for other myopathies. Electrocardiography is useful in evaluating a cardiac dysrhythmia or a toxicologic etiology. Arterial or venous blood gases may not be useful for diagnosing crisis, but can help with ventilator management. Plasma exchange and intravenous immunoglobulin are the primary treatments for myasthenic crisis.12 If the trigger is identified, the underlying cause should be treated concurrently.
Design, synthesis, and biological evaluation of arylmethylpiperidines as Kv1.5 potassium channel inhibitors
Published in Journal of Enzyme Inhibition and Medicinal Chemistry, 2022
Lingyue Zhao, Qian Yang, Yiqun Tang, Qidong You, Xiaoke Guo
The healthy, male guinea pigs weighing 250–300 g were anaesthetised with urethane and fixed on the operating table. Using needle electrodes to pierce the extremities and subcutaneously on the chest, and the whole heart lead electrocardiogram was recorded. The right jugular vein is separated and cannulated. After 5 min, DDO-02005, Azimilide, (3 × 10−7, 10−6, 3 × 10−6, 10−5, 3 × 10−5 mol/kg) dissolved in saline were given cumulative injections, each concentration is given in equal volume (1.5 ml/kg). After administration, the BL-420F biological function experiment system recorded synchronous body surface electrocardiogram (adjust control parameter gain G: 1mv, time constant T: 0.1 s, low channel filter 100 Hz, scanning speed 250 ms/div, and start 50 Hz suppression).