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The Holter's most common use is for monitoring heart activity (electrocardiography or ECG), but it can also be used for monitoring brain activity (electroencephalography or EEG) or arterial pressure. Its extended recording period is sometimes useful for observing occasional cardiac arrhythmias or epileptic events which would be difficult to identify in a shorter period of time. For patients having more transient symptoms, a cardiac event monitor which can be worn for a month or more can be used.
The Holter monitor is named after physicist Norman J. Holter, who invented telemetric cardiac monitoring in 1949. Clinical use started in the early 1960s.
When used for the heart, (much like standard electrocardiography) the Holter monitor records electrical signals from the heart via a series of electrodes attached to the chest. Electrodes are placed over bones to minimize artifacts from muscular activity. The number and position of electrodes varies by model, but most Holter monitors employ between three and eight. These electrodes are connected to a small piece of equipment that is attached to the patient's belt or hung around the neck, and is responsible for keeping a log of the heart's electrical activity throughout the recording period.
Ophthalmology is the branch of medicine that deals with the anatomy, physiology and diseases of the eye. An ophthalmologist is a specialist in medical and surgical eye problems. Since ophthalmologists perform operations on eyes, they are both surgical and medical specialists. A multitude of diseases and conditions can be diagnosed from the eye.
Podiatry or podiatric medicine is a branch of medicine devoted to the study of diagnosis, medical and surgical treatment of disorders of the foot, ankle, and lower extremity. The term podiatry came into use in the early 20th century in the United States and is now used worldwide, within countries such as the United Kingdom and Australia.
A Doctor of Podiatric Medicine (DPM), is a medical specialist who diagnose and treats conditions affecting the foot, ankle, and structures of the leg.[2] The training of podiatric physicians includes human anatomy, physiology, pathophysiology, sociological and psychological perspectives, general medicine, surgery and pharmacology. Specialist podiatric physicians are podiatrists with additional postgraduate training or fellowship training and experience in the specialized field.
Within the field of podiatry, US trained podiatric physicians rotate through major areas of medicine gaining exposure and practice to areas including but not limited to: surgery, sports medicine, biomechanics, geriatrics, internal medicine,diabetes, vascular, neurological, pediatrics, dermatological, orthopedics, or primary care.
Psychology is an academic and applied discipline that involves the scientific study of mental functions and behaviors. Psychology has the immediate goal of understanding individuals and groups by both establishing general principles and researching specific cases, and by many accounts it ultimately aims to benefit society. In this field, a professional practitioner or researcher is called a psychologist and can be classified as a social, behavioral, or cognitive scientist. Psychologists attempt to understand the role of mental functions in individual and social behavior, while also exploring the physiological and biological processes that underlie cognitive functions and behaviors.
Psychologists explore concepts such as perception, cognition, attention, emotion, intelligence, phenomenology, motivation, brain functioning, personality, behavior, and interpersonal relationships, including psychological resilience, family resilience, and other areas. Psychologists of diverse orientations also consider the unconscious mind.Psychologists employ empirical methods to infer causal and correlational relationships between psychosocial variables. In addition, or in opposition, to employing empirical and deductive methods, some—especially clinical and counseling psychologists—at times rely upon symbolic interpretation and other inductive techniques. Psychology has been described as a "hub science",[8] with psychological findings linking to research and perspectives from the social sciences, natural sciences, medicine, and the humanities, such as philosophy.
Sonography, also called ultrasound imaging or ultrasound scanning, uses high frequency sound waves to obtain a real time image of the inside of the body. The image shows the movement of blood and organs and the structure of internal tissues. Traditionally, a sonogram will show a flat presentation of the examined region, but three dimensional (3D) images are also possible, as are 4D pictures, which show 3D images in motion. The picture is called an ultrasound or a sonogram.
The technology behind sonography is similar to the way bats, dolphins, and fishermen use sonar. When sound waves enter the atmosphere, they bounce off objects, creating an echo. When these echoed waves are measured, they can reveal the shape and movement of the object they struck. In an ultrasound, a transducer emits the sound waves and records and measures them when they return. The transducer is pressed to the skin, which instantly produces an image of the internal organs being examined.
Medical professionals use this technology to examine the inside of the body without using ionizing radiation. If a patient has pain, swelling, or infection, a healthcare provider will commonly conduct an ultrasound to make a diagnosis. A sonogram is useful for looking at the heart, blood vessels, unborn fetuses in pregnant patients, ovaries, thyroid glands, kidneys, and other organs. After a heart attack, the device may also be used to assess the damage to the heart.
Urology, also known as genitourinary surgery, is the branch of medicine that focuses on the surgical and medical diseases of the male and female urinary tract system and the male reproductive organs. The organs under the domain of urology include the kidneys, adrenal glands, ureters, urinary bladder, urethra, and the male reproductive organs (testes, epididymis, vas deferens, seminal vesicles, prostate and penis).
The urinary and reproductive tracts are closely linked, and disorders of one often affect the other. Thus a major spectrum of the conditions managed in urology exists under the domain of genitourinary disorders. Urology combines the management of medical (i.e., non-surgical) conditions such as urinary tract infections and benign prostatic hyperplasia, with the management of surgical conditions such as bladder or prostate cancer, kidney stones, congenital abnormalities, traumatic injury, and stress incontinence.
Urology has traditionally been on the cutting-edge of surgical technology in the field of medicine. Urologists are well-trained in minimally-invasive techniques, employing real-time ultrasound guidance, fiber-optic endoscopic equipment, and various lasers in the treatment of multiple benign and malignant conditions.[1] In addition, urologists are pioneers in the use of robotics in laparoscopic surgery. Urology is closely related to (and urologists often collaborate with the practitioners of) the medical fields of oncology, nephrology, gynaecology, andrology, pediatric surgery, colorectal surgery, gastroenterology, and endocrinology.
"VNG" redirects here. For other uses, see VNG (disambiguation).
Videonystagmography (VNG) is a technology for testing inner ear and central motor functions, a process known as vestibular assessment. It involves the use of infrared goggles to trace eye movements during visual stimulation and positional changes. VNG can determine whether dizziness is caused by inner ear disease, particularly benign paroxysmal positional vertigo (BPPV), as opposed to some other cause such as low blood pressure or anxiety.