Results for "stroke"
Electroconvulsive Therapy
Electroconvulsive therapy (ECT) is a psychiatric treatment that induces a generalized seizure by passing electrical current through the brain, often used as an intervention for mental disorders when other treatments are inadequate.
Health & MedicineConditions Encyclopedia Entry 1777007106
** Atrial septal defect (ASD) is a congenital heart defect characterized by an abnormal opening in the atrial septum, the wall of tissue that separates the upper chambers of the heart. **CONTENT:** ### Overview Atrial septal defect (ASD) is a common congenital heart defect that affects approximately 1 in 2,500 births. It occurs when there is an abnormal opening in the atrial septum, the wall of tissue that separates the upper chambers of the heart, known as the left and right atria. This opening allows blood to flow between the two chambers, which can lead to various complications. ASDs can be classified into three main types: ostium secundum, ostium primum, and sinus venosus. ASDs can be present at birth or may not be diagnosed until later in life. In some cases, individuals with ASDs may not experience any symptoms, while others may experience fatigue, shortness of breath, or palpitations. ASDs can also increase the risk of developing other heart problems, such as pulmonary hypertension and heart failure. ### History/Background The first recorded description of ASDs dates back to the 17th century, when the English physician Thomas Sydenham described a case of a patient with a "hole in the heart." However, it wasn't until the 20th century that ASDs were more widely recognized and understood. In the 1950s and 1960s, surgeons began to develop techniques for repairing ASDs, including the use of surgical patches and catheter-based interventions. ### Key Information ASDs can be diagnosed using various tests, including: * Echocardiogram: an ultrasound of the heart that uses sound waves to create images of the heart. * Electrocardiogram (ECG): a test that measures the electrical activity of the heart. * Chest X-ray: a test that uses X-rays to create images of the heart and lungs. * Cardiac catheterization: a test that uses a catheter to inject dye into the heart and take pictures of the heart's blood vessels. Treatment options for ASDs include: * Surgical repair: a surgical procedure that closes the abnormal opening in the atrial septum. * Catheter-based repair: a minimally invasive procedure that uses a catheter to close the abnormal opening. * Watchful waiting: a conservative approach that involves monitoring the individual's condition and treating symptoms as needed. ### Significance ASDs can have significant consequences if left untreated. Complications can include: * Pulmonary hypertension: high blood pressure in the lungs that can lead to heart failure. * Heart failure: a condition in which the heart is unable to pump enough blood to meet the body's needs. * Stroke: a condition in which the blood supply to the brain is interrupted. Early diagnosis and treatment of ASDs can significantly improve outcomes and prevent complications. **INFOBOX:** - Name: Atrial Septal Defect (ASD) - Type: Congenital Heart Defect - Date: First described in the 17th century - Location: Affects the upper chambers of the heart - Known For: Common congenital heart defect that can lead to various complications if left untreated. **TAGS:** congenital heart defect, atrial septal defect, ASD, heart defect, heart disease, pulmonary hypertension, heart failure, stroke, cardiovascular disease.
Health & MedicineConditions Encyclopedia Entry 1777013884
** Hypertrophic cardiomyopathy (HCM) is a genetic disorder that affects the heart muscle, causing it to thicken and become stiff, leading to potential complications such as heart failure, arrhythmias, and sudden cardiac death. **CONTENT:** ## Overview Hypertrophic cardiomyopathy (HCM) is a complex and often misunderstood heart condition that affects millions of people worldwide. It is characterized by the thickening of the heart muscle, which can lead to a range of symptoms and complications. HCM is a leading cause of sudden cardiac death in young athletes and is often associated with other medical conditions, such as arrhythmias and heart failure. Despite its prevalence, HCM remains a relatively unknown condition, and many people are unaware of the risks and warning signs associated with it. HCM is a genetic disorder that affects the heart muscle, causing it to thicken and become stiff. This can lead to a range of symptoms, including chest pain, shortness of breath, and fatigue. In some cases, HCM can also cause arrhythmias, which are abnormal heart rhythms that can be life-threatening. If left untreated, HCM can lead to serious complications, including heart failure, stroke, and sudden cardiac death. ## History/Background HCM has been described in medical literature for over a century, but it was not until the 1960s that the condition was fully understood and recognized as a distinct medical entity. In the 1970s and 1980s, researchers began to identify the genetic causes of HCM, and in the 1990s, the first genetic tests for the condition were developed. Today, HCM is recognized as a leading cause of sudden cardiac death in young athletes, and efforts are underway to improve diagnosis and treatment of the condition. ## Key Information HCM is a genetic disorder that affects the heart muscle, causing it to thicken and become stiff. The condition is caused by mutations in genes that code for proteins involved in the structure and function of the heart muscle. HCM can be inherited in an autosomal dominant pattern, meaning that a single copy of the mutated gene is enough to cause the condition. In some cases, HCM can also be caused by other factors, such as high blood pressure or obesity. Symptoms of HCM can vary widely, but common symptoms include: * Chest pain or discomfort * Shortness of breath * Fatigue or weakness * Dizziness or lightheadedness * Palpitations or irregular heartbeats In some cases, HCM can also cause more serious complications, including: * Arrhythmias, which are abnormal heart rhythms that can be life-threatening * Heart failure, which occurs when the heart is unable to pump enough blood to meet the body's needs * Stroke, which occurs when the blood supply to the brain is interrupted ## Significance HCM is a significant public health concern, particularly in young athletes. According to the American Heart Association, HCM is the leading cause of sudden cardiac death in young athletes, accounting for up to 40% of all sudden cardiac deaths in this population. In addition, HCM is a leading cause of heart failure and stroke in adults, and is associated with a range of other medical conditions, including high blood pressure and obesity. ## INFOBOX: - **Name:** Hypertrophic Cardiomyopathy (HCM) - **Type:** Genetic disorder - **Date:** First described in medical literature in the 19th century - **Location:** Affects people worldwide - **Known For:** Leading cause of sudden cardiac death in young athletes ## TAGS: Hypertrophic cardiomyopathy, heart muscle disease, genetic disorder, arrhythmias, heart failure, stroke, sudden cardiac death, young athletes, heart health.
Health & MedicineConditions Encyclopedia Entry 1778228601
This article provides a comprehensive overview of **Hypertension**, a common medical condition characterized by elevated blood pressure, its history, key information, significance, and importance of seeking professional care.
Health & MedicineAnatomy Encyclopedia Entry 1778386520
** The **Human Brain** is the central organ of the human nervous system, responsible for controlling and coordinating the body's functions, processing information, and facilitating thought, emotion, and behavior. **CONTENT:** ### Overview The human brain is a complex and intricate organ, consisting of approximately 86 billion neurons and trillions of synapses. It is protected by the skull and is divided into three main parts: the **cerebrum**, the **cerebellum**, and the **brainstem**. The cerebrum is the largest part of the brain and is responsible for processing sensory information, controlling movement, and facilitating thought, emotion, and behavior. The cerebellum is located at the base of the brain and is involved in coordinating movement and balance. The brainstem connects the cerebrum to the spinal cord and regulates basic functions such as breathing, heart rate, and blood pressure. The human brain is a highly dynamic and adaptable organ, capable of reorganizing itself in response to injury or disease. This process, known as **neuroplasticity**, allows the brain to compensate for damaged areas and adapt to new situations. The brain is also highly energy-intensive, consuming approximately 20% of the body's total energy expenditure. ### History/Background The study of the human brain dates back to ancient civilizations, with evidence of brain dissection and study found in ancient Egyptian and Greek texts. However, it wasn't until the 19th century that the modern field of neuroscience began to take shape. The discovery of the **neuron** by Santiago Ramón y Cajal in 1889 marked a major breakthrough in our understanding of the brain's structure and function. The development of **electroencephalography (EEG)** in the early 20th century allowed researchers to study the brain's electrical activity, while the invention of **functional magnetic resonance imaging (fMRI)** in the 1990s enabled the visualization of brain activity in real-time. ### Key Information The human brain is composed of several distinct regions, each with its own unique function and structure. The **cerebral cortex** is the outer layer of the brain, responsible for processing sensory information and facilitating thought, emotion, and behavior. The **basal ganglia** are a group of structures involved in movement control and habit formation. The **limbic system** is a network of structures that play a key role in emotion, motivation, and memory. The brain is also home to several key systems, including the **nervous system**, which transmits and processes information, and the **endocrine system**, which regulates hormone production and secretion. The brain is also highly susceptible to injury and disease, with conditions such as **stroke**, **traumatic brain injury**, and **neurodegenerative diseases** such as **Alzheimer's** and **Parkinson's** affecting millions of people worldwide. ### Significance The human brain is a remarkable and complex organ, responsible for controlling and coordinating the body's functions, processing information, and facilitating thought, emotion, and behavior. The study of the brain has led to numerous breakthroughs in our understanding of human behavior, cognition, and emotion, and has paved the way for the development of new treatments and therapies for a range of neurological and psychiatric conditions. **INFOBOX:** - Name: Human Brain - Type: Organ - Date: 1889 (discovery of the neuron) - Location: Skull - Known For: Controlling and coordinating the body's functions, processing information, and facilitating thought, emotion, and behavior **TAGS:** brain, neuroscience, neuroplasticity, neuron, EEG, fMRI, cerebral cortex, basal ganglia, limbic system, nervous system, endocrine system, stroke, traumatic brain injury, neurodegenerative diseases, Alzheimer's, Parkinson's.