falan42/medcuad_data huggingface dataset:
Topic: Chiari Malformation
Question: What is (are) Chiari Malformation ?
Answer: Chiari malformations (CMs) are structural defects in the cerebellum, the part of the brain that controls balance. When the indented bony space at the lower rear of the skull is smaller than normal, the cerebellum and brain stem can be pushed downward. The resulting pressure on the cerebellum can block the flow of cerebrospinal fluid (the liquid that surrounds and protects the brain and spinal cord) and can cause a range of symptoms including dizziness, muscle weakness, numbness, vision problems, headache, and problems with balance and coordination. Symptoms may change for some individuals depending on buildup of CNS and any resulting pressure on tissue and nerves. CMs are classified by the severity of the disorder and the parts of the brain that protrude into the spinal canal. The most common is Type I, which may not cause symptoms and is often found by accident during an examination for another condition. Type II (also called Arnold-Chiari malformation) is usually accompanied by a myelomeningocele-a form of spina bifida that occurs when the spinal canal and backbone do not close before birth, causing the spinal cord to protrude through an opening in the back. This can cause partial or complete paralysis below the spinal opening. Type III is the most serious form of CM, and causes severe neurological defects. Other conditions sometimes associated with CM include hydrocephalus, syringomyelia (a fluid-filled cyst in the spinal cord), and spinal curvature.
(Source: NINDS)
Topic: Chiari Malformation
Question: What are the treatments for Chiari Malformation ?
Answer: Medications may ease certain symptoms, such as pain. Surgery is the only treatment available to correct functional disturbances or halt the progression of damage to the central nervous system. More than one surgery may be needed to treat the condition. Some CMs have no noticeable symptoms and do not interfere with the person's activities of daily living.
(Source: NINDS)
Topic: Chiari Malformation
Question: What is the outlook for Chiari Malformation ?
Answer: Many people with Type I CM are asymptomatic and do not know they have the condition. Many individuals with the more severe types of CM and have surgery see a reduction in their symptoms and/or prolonged periods of relative stability, although paralysis is generally permanent.
(Source: NINDS)
Topic: Chiari Malformation
Question: what research (or clinical trials) is being done for Chiari Malformation ?
Answer: The NINDS supports research on disorders of the brain and nervous system such as Chiari malformations. The goals of this research are to increase scientific understanding of these disorders and to find ways to prevent, treat, and, ultimately, cure them. Current NINDS-funded research includes studies to better understand the genetic factors responsible for the malformation, and factors that influence the development, progression, and relief of symptoms among people with syringomyelia, including those with Chiari I malformations.
(Source: NINDS)
Topic: Atrial Fibrillation and Stroke
Question: What is (are) Atrial Fibrillation and Stroke ?
Answer: Atrial fibrillation (AF) describes the rapid, irregular beating of the left atrium (upper chamber) of the heart. These rapid contractions of the heart are weaker than normal contractions, resulting in slow flow of blood in the atrium. The blood pools and becomes sluggish and can result in the formation of blood clots. If a clot leaves the heart and travels to the brain, it can cause a stroke by blocking the flow of blood through cerebral arteries. Some people with AF have no symptoms, but others may experience a fluttering feeling in the area of the chest above the heart, chest pain, lightheadness or fainting, shortness of breath, and fatigue. AF is diagnosed by an electrocardiogram (ECG), a device that records the hearts electrical activity. Other tests are often performed to rule out contributing causes, such as high blood pressure, an overactive thyroid gland, heart failure, faulty heart valves, lung disease, and stimulant or alcohol abuse. Some people will have no identifiable cause for their AF.
(Source: NINDS)
Topic: Atrial Fibrillation and Stroke
Question: What are the treatments for Atrial Fibrillation and Stroke ?
Answer: Within a few hours after onset of a stroke, treatment with drugs or devices that dissolve or break up the clot can restore blood flow to the brain and lead to a better recovery. To prevent strokes related to AF, doctors often prescribe medications to prevent formation of clots in the heart, which can travel to the brain and cause stroke. Immediately after a stroke, doctors may temporarily administer heparin by injection, while starting an oral medication for long-term protection from clots. The most commonly used drug has been warfarin. People taking warfarin must be closely monitored to make sure their blood is thin enough to prevent clots, but not so thin as to promote bleeding. Since some foods, vitamin supplements, and medications can affect warfarin action, keeping the blood just thin enough can be tricky. More recently, a number of new blood thinners, including dabigatran, rivaroxaban, and apixaban, have been shown to be as effective as warfarin in stroke prevention. These newer medications do not require regular blood test monitoring and may have less tendency to cause bleeding due to making the blood too thin. Some individuals with AF may have a lower risk of stroke and may be treated with aspirin, either alone or with another antiplatelet agency like clopidogrel. Other treatments for AF include medications such as beta blockers or calcium channel blockers to slow the heartbeat, and anti-arrhythmic drugs or electrical cardioversion (which delivers an electrical shock to the heart) to normalize the heartbeat.
(Source: NINDS)
Topic: Atrial Fibrillation and Stroke
Question: What is the outlook for Atrial Fibrillation and Stroke ?
Answer: AF, which affects as many as 2.2 million Americans, increases an individuals risk of stroke by 4 to 6 times on average. The risk increases with age. In people over 80 years old, AF is the direct cause of 1 in 4 strokes. Treating individuals with warfarin or new blood thinners reduces the rate of stroke for those who have AF by approximately one-half to two- thirds. People with AF can have multiple strokes, including silent strokes (strokes that don't show physical symptoms but show up on a brain scan) that, over time, can cause dementia, so prevention is important.
(Source: NINDS)
Topic: Atrial Fibrillation and Stroke
Question: what research (or clinical trials) is being done for Atrial Fibrillation and Stroke ?
Answer: The National Institute of Neurological Disorders and Stroke (NINDS) is the leading Federal agency directing and funding research relevant to AF and stroke prevention. The NINDS conducts basic and clinical research in its laboratories and clinics at the National Institutes of Health (NIH), and also supports additional research through grants to major research institutions across the country. Much of this research focuses on finding better ways to prevent, treat, and ultimately cure disorders such as AF that can increase the risk of stroke.
(Source: NINDS)
Topic: X-linked congenital stationary night blindness
Question: What is (are) X-linked congenital stationary night blindness ?
Answer: X-linked congenital stationary night blindness is a disorder of the retina, which is the specialized tissue at the back of the eye that detects light and color. People with this condition typically have difficulty seeing in low light (night blindness). They also have other vision problems, including loss of sharpness (reduced acuity), severe nearsightedness (high myopia), involuntary movements of the eyes (nystagmus), and eyes that do not look in the same direction (strabismus). Color vision is typically not affected by this disorder.  The vision problems associated with this condition are congenital, which means they are present from birth. They tend to remain stable (stationary) over time.  Researchers have identified two major types of X-linked congenital stationary night blindness: the complete form and the incomplete form. The types have very similar signs and symptoms. However, everyone with the complete form has night blindness, while not all people with the incomplete form have night blindness. The types are distinguished by their genetic cause and by the results of a test called an electroretinogram, which measures the function of the retina.
(Source: GHR)
Topic: X-linked congenital stationary night blindness
Question: How many people are affected by X-linked congenital stationary night blindness ?
Answer: The prevalence of this condition is unknown. It appears to be more common in people of Dutch-German Mennonite descent. However, this disorder has been reported in families with many different ethnic backgrounds. The incomplete form is more common than the complete form.
(Source: GHR)
Topic: X-linked congenital stationary night blindness
Question: What are the genetic changes related to X-linked congenital stationary night blindness ?
Answer: Mutations in the NYX and CACNA1F genes cause the complete and incomplete forms of X-linked congenital stationary night blindness, respectively. The proteins produced from these genes play critical roles in the retina.  Within the retina, the NYX and CACNA1F proteins are located on the surface of light-detecting cells called photoreceptors. The retina contains two types of photoreceptor cells: rods and cones. Rods are needed for vision in low light. Cones are needed for vision in bright light, including color vision. The NYX and CACNA1F proteins ensure that visual signals are passed from rods and cones to other retinal cells called bipolar cells, which is an essential step in the transmission of visual information from the eyes to the brain.  Mutations in the NYX or CACNA1F gene disrupt the transmission of visual signals between photoreceptors and retinal bipolar cells, which impairs vision. In people with the complete form of X-linked congenital stationary night blindness (resulting from NYX mutations), the function of rods is severely disrupted, while the function of cones is only mildly affected. In people with the incomplete form of the condition (resulting from CACNA1F mutations), rods and cones are both affected, although they retain some ability to detect light.
(Source: GHR)
Topic: X-linked congenital stationary night blindness
Question: Is X-linked congenital stationary night blindness inherited ?
Answer: This condition is inherited in an X-linked recessive pattern. The NYX and CACNA1F genes are located on the X chromosome, which is one of the two sex chromosomes. In males (who have only one X chromosome), one altered copy of the gene in each cell is sufficient to cause the condition. In females (who have two X chromosomes), a mutation would have to occur in both copies of the gene to cause the disorder. Because it is unlikely that females will have two altered copies of this gene, males are affected by X-linked recessive disorders much more frequently than females. A characteristic of X-linked inheritance is that fathers cannot pass X-linked traits to their sons.  In X-linked recessive inheritance, a female with one altered copy of the gene in each cell is called a carrier. Carriers of an NYX or CACNA1F mutation can pass on the mutated gene, but most do not develop any of the vision problems associated with X-linked congenital stationary night blindness. However, carriers may have retinal changes that can be detected with an electroretinogram.
(Source: GHR)
Topic: X-linked congenital stationary night blindness
Question: What are the treatments for X-linked congenital stationary night blindness ?
Answer: These resources address the diagnosis or management of X-linked congenital stationary night blindness:  - American Optometric Association: Infant Vision  - Gene Review: Gene Review: X-Linked Congenital Stationary Night Blindness  - Genetic Testing Registry: Congenital stationary night blindness  - Genetic Testing Registry: Congenital stationary night blindness, type 1A  - Genetic Testing Registry: Congenital stationary night blindness, type 2A  - MedlinePlus Encyclopedia: Electroretinography  - MedlinePlus Encyclopedia: Eye movements - Uncontrollable  - MedlinePlus Encyclopedia: Nearsightedness  - MedlinePlus Encyclopedia: Strabismus  - MedlinePlus Encyclopedia: Vision - Night Blindness   These resources from MedlinePlus offer information about the diagnosis and management of various health conditions:  - Diagnostic Tests  - Drug Therapy  - Surgery and Rehabilitation  - Genetic Counseling   - Palliative Care
(Source: GHR)
Topic: Brugada syndrome
Question: What is (are) Brugada syndrome ?
Answer: Brugada syndrome is a condition that causes a disruption of the heart's normal rhythm. Specifically, this disorder can lead to irregular heartbeats in the heart's lower chambers (ventricles), which is an abnormality called ventricular arrhythmia. If untreated, the irregular heartbeats can cause fainting (syncope), seizures, difficulty breathing, or sudden death. These complications typically occur when an affected person is resting or asleep.  Brugada syndrome usually becomes apparent in adulthood, although it can develop any time throughout life. Signs and symptoms related to arrhythmias, including sudden death, can occur from early infancy to late adulthood. Sudden death typically occurs around age 40. This condition may explain some cases of sudden infant death syndrome (SIDS), which is a major cause of death in babies younger than 1 year. SIDS is characterized by sudden and unexplained death, usually during sleep.  Sudden unexplained nocturnal death syndrome (SUNDS) is a condition characterized by unexpected cardiac arrest in young adults, usually at night during sleep. This condition was originally described in Southeast Asian populations, where it is a major cause of death. Researchers have determined that SUNDS and Brugada syndrome are the same disorder.
(Source: GHR)
Topic: Brugada syndrome
Question: How many people are affected by Brugada syndrome ?
Answer: The exact prevalence of Brugada syndrome is unknown, although it is estimated to affect 5 in 10,000 people worldwide. This condition occurs much more frequently in people of Asian ancestry, particularly in Japanese and Southeast Asian populations.  Although Brugada syndrome affects both men and women, the condition appears to be 8 to 10 times more common in men. Researchers suspect that testosterone, a sex hormone present at much higher levels in men, may account for this difference.
(Source: GHR)
Topic: Brugada syndrome
Question: What are the genetic changes related to Brugada syndrome ?
Answer: Brugada syndrome can be caused by mutations in one of several genes. The most commonly mutated gene in this condition is SCN5A, which is altered in approximately 30 percent of affected individuals. This gene provides instructions for making a sodium channel, which normally transports positively charged sodium atoms (ions) into heart muscle cells. This type of ion channel plays a critical role in maintaining the heart's normal rhythm. Mutations in the SCN5A gene alter the structure or function of the channel, which reduces the flow of sodium ions into cells. A disruption in ion transport alters the way the heart beats, leading to the abnormal heart rhythm characteristic of Brugada syndrome.  Mutations in other genes can also cause Brugada syndrome. Together, these other genetic changes account for less than two percent of cases of the condition. Some of the additional genes involved in Brugada syndrome provide instructions for making proteins that ensure the correct location or function of sodium channels in heart muscle cells. Proteins produced by other genes involved in the condition form or help regulate ion channels that transport calcium or potassium into or out of heart muscle cells. As with sodium channels, proper flow of ions through calcium and potassium channels in the heart muscle helps maintain a regular heartbeat. Mutations in these genes disrupt the flow of ions, impairing the heart's normal rhythm.  In affected people without an identified gene mutation, the cause of Brugada syndrome is often unknown. In some cases, certain drugs may cause a nongenetic (acquired) form of the disorder. Drugs that can induce an altered heart rhythm include medications used to treat some forms of arrhythmia, a condition called angina (which causes chest pain), high blood pressure, depression, and other mental illnesses. Abnormally high blood levels of calcium (hypercalcemia) or potassium (hyperkalemia), as well as unusually low potassium levels (hypokalemia), also have been associated with acquired Brugada syndrome. In addition to causing a nongenetic form of this disorder, these factors may trigger symptoms in people with an underlying mutation in SCN5A or another gene.
(Source: GHR)
Topic: Brugada syndrome
Question: Is Brugada syndrome inherited ?
Answer: This condition is inherited in an autosomal dominant pattern, which means one copy of the altered gene in each cell is sufficient to cause the disorder. In most cases, an affected person has one parent with the condition. Other cases may result from new mutations in the gene. These cases occur in people with no history of the disorder in their family.
(Source: GHR)
Topic: Brugada syndrome
Question: What are the treatments for Brugada syndrome ?
Answer: These resources address the diagnosis or management of Brugada syndrome:  - Gene Review: Gene Review: Brugada Syndrome  - Genetic Testing Registry: Brugada syndrome  - Genetic Testing Registry: Brugada syndrome 1  - MedlinePlus Encyclopedia: Arrhythmias   These resources from MedlinePlus offer information about the diagnosis and management of various health conditions:  - Diagnostic Tests  - Drug Therapy  - Surgery and Rehabilitation  - Genetic Counseling   - Palliative Care
(Source: GHR)
Topic: Rabson-Mendenhall syndrome
Question: What is (are) Rabson-Mendenhall syndrome ?
Answer: Rabson-Mendenhall syndrome is a rare disorder characterized by severe insulin resistance, a condition in which the body's tissues and organs do not respond properly to the hormone insulin. Insulin normally helps regulate blood sugar levels by controlling how much sugar (in the form of glucose) is passed from the bloodstream into cells to be used as energy. In people with Rabson-Mendenhall syndrome, insulin resistance impairs blood sugar regulation and ultimately leads to a condition called diabetes mellitus, in which blood sugar levels can become dangerously high.  Severe insulin resistance in people with Rabson-Mendenhall syndrome affects the development of many parts of the body. Affected individuals are unusually small starting before birth, and infants experience failure to thrive, which means they do not grow and gain weight at the expected rate. Additional features of the condition that become apparent early in life include a lack of fatty tissue under the skin (subcutaneous fat); wasting (atrophy) of muscles; dental abnormalities; excessive body hair growth (hirsutism); multiple cysts on the ovaries in females; and enlargement of the nipples, genitalia, kidneys, heart, and other organs. Most affected individuals also have a skin condition called acanthosis nigricans, in which the skin in body folds and creases becomes thick, dark, and velvety. Distinctive facial features in people with Rabson-Mendenhall syndrome include prominent, widely spaced eyes; a broad nose; and large, low-set ears.  Rabson-Mendenhall syndrome is one of a group of related conditions described as inherited severe insulin resistance syndromes. These disorders, which also include Donohue syndrome and type A insulin resistance syndrome, are considered part of a spectrum. Rabson-Mendenhall syndrome is intermediate in severity between Donohue syndrome (which is usually fatal before age 2) and type A insulin resistance syndrome (which is often not diagnosed until adolescence). People with Rabson-Mendenhall syndrome develop signs and symptoms early in life and live into their teens or twenties. Death usually results from complications related to diabetes mellitus, such as a toxic buildup of acids called ketones in the body (diabetic ketoacidosis).
(Source: GHR)
Topic: Rabson-Mendenhall syndrome
Question: How many people are affected by Rabson-Mendenhall syndrome ?
Answer: Rabson-Mendenhall syndrome is estimated to affect less than 1 per million people worldwide. Several dozen cases have been reported in the medical literature.
(Source: GHR)
Topic: Rabson-Mendenhall syndrome
Question: What are the genetic changes related to Rabson-Mendenhall syndrome ?
Answer: Rabson-Mendenhall syndrome results from mutations in the INSR gene. This gene provides instructions for making a protein called an insulin receptor, which is found in many types of cells. Insulin receptors are embedded in the outer membrane surrounding the cell, where they attach (bind) to insulin circulating in the bloodstream. This binding triggers signaling pathways that influence many cell functions.  The INSR gene mutations that cause Rabson-Mendenhall syndrome reduce the number of insulin receptors that reach the cell membrane or diminish the function of these receptors. Although insulin is present in the bloodstream, without enough functional receptors it is less able to exert its effects on cells and tissues. This severe resistance to the effects of insulin impairs blood sugar regulation and affects many aspects of development in people with Rabson-Mendenhall syndrome.
(Source: GHR)
Topic: Rabson-Mendenhall syndrome
Question: Is Rabson-Mendenhall syndrome inherited ?
Answer: This condition is inherited in an autosomal recessive pattern, which means both copies of the gene in each cell have mutations. The parents of an individual with an autosomal recessive condition each carry one copy of the mutated gene, but they typically do not show signs and symptoms of the condition.
(Source: GHR)
Topic: Rabson-Mendenhall syndrome
Question: What are the treatments for Rabson-Mendenhall syndrome ?
Answer: These resources address the diagnosis or management of Rabson-Mendenhall syndrome:  - Genetic Testing Registry: Pineal hyperplasia AND diabetes mellitus syndrome   These resources from MedlinePlus offer information about the diagnosis and management of various health conditions:  - Diagnostic Tests  - Drug Therapy  - Surgery and Rehabilitation  - Genetic Counseling   - Palliative Care
(Source: GHR)