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Stroke | Cleveland Clin

What is a stroke? A stroke, sometimes called a "brain attack," occurs when blood flow to an area in the brain is cut off. The brain cells, deprived of the oxygen and glucose needed to survive, die. If not caught early, permanent brain damage can result. How does a stroke occur? There are two types of stroke. Ischemic stroke is similar to a heart attack, except it occurs in the blood vessels of ...

Symptoms and causes - Mayo Clinic

ew Heart rhythm problems (heart arrhythmias) occur when the electrical impulses that coordinate your heartbeats don't work properly, causing your heart to beat too fast, too slow or irregularly. Heart arrhythmias (uh-RITH-me-uhs) may feel like a fluttering or racing heart and may be harmless. However, some heart arrhythmias may cause bothersome — sometimes even life-threatening — signs and symp...

Symptoms and causes - Mayo Clinic

ew In atrial flutter, your heart's upper chambers (atria) beat too quickly. This causes the heart to beat in a fast, regular rhythm. Atrial flutter is a type of heart rhythm disorder (arrhythmia) caused by problems in your heart's electrical system. Atrial flutter is similar to atrial fibrillation, a common heart rhythm disorder. However, the rhythm in your atria is more organized and less chao...

Diagnosis and treatment - Mayo Clinic

sis Ventricular fibrillation is always diagnosed in an emergency situation. Your doctors will know if you're in ventricular fibrillation based on results from: Heart monitoring. A heart monitor that will read the electrical impulses that make your heart beat will show that your heart is beating erratically or not at all. Pulse check. In ventricular fibrillation, there will be no pulse. Tests to...

Diagnosis and treatment - Mayo Clinic

sis To diagnose atrial fibrillation, your doctor may review your signs and symptoms, review your medical history, and conduct a physical examination. Your doctor may order several tests to diagnose your condition, including: Electrocardiogram (ECG). An ECG uses small sensors (electrodes) attached to your chest and arms to sense and record electrical signals as they travel through your heart. Th...

Symptoms and causes - Mayo Clinic

ew Atrial fibrillation is an irregular and often rapid heart rate that can increase your risk of stroke, heart failure and other heart-related complications. During atrial fibrillation, the heart's two upper chambers (the atria) beat chaotically and irregularly — out of coordination with the two lower chambers (the ventricles) of the heart. Atrial fibrillation symptoms often include heart palpi...

Care at Mayo Clinic - Mayo Clinic

disease care at Mayo Clinic Your Mayo Clinic care team At Mayo Clinic, a multidisciplinary team of cardiologists, doctors trained in heart surgery (cardiac surgeons) and other doctors collaborates to evaluate you and provide the most appropriate treatment for your condition. Having all this expertise in a single place means that your care is discussed among the team, test results are available ...

Request an appointment - Mayo Clinic

t an appointment By Mayo Clinic Staff Mayo Clinic works with hundreds of insurance companies and is an in-network provider for millions of people. In most cases, Mayo Clinic doesn't require a physician referral. Some insurers require referrals, or may have additional requirements for certain medical care. All appointments are prioritized on the basis of medical need. U.S. patients Online reques...

Symptoms and causes - Mayo Clinic

ew In Wolff-Parkinson-White (WPW) syndrome, an extra electrical pathway between your heart's upper and lower chambers causes a rapid heartbeat. The extra pathway is present at birth and fairly rare. The episodes of fast heartbeats usually aren't life-threatening, but serious heart problems can occur. Treatment can stop or prevent episodes of fast heartbeats. A catheter-based procedure (ablation...

Symptoms and causes - Mayo Clinic

ew Ventricular fibrillation is a heart rhythm problem that occurs when the heart beats with rapid, erratic electrical impulses. This causes pumping chambers in your heart (the ventricles) to quiver uselessly, instead of pumping blood. Sometimes triggered by a heart attack, ventricular fibrillation causes your blood pressure to plummet, cutting off blood supply to your vital organs. Ventricular ...

Symptoms and causes - Mayo Clinic

ew Ventricular tachycardia is a heart rhythm disorder (arrhythmia) caused by abnormal electrical signals in the lower chambers of the heart (ventricles). Your heart rate is regulated by electrical signals sent across heart tissues. A healthy heart normally beats about 60 to 100 times a minute when at rest and is defined by signals that originate in the upper chambers of the heart (atria). In ve...

Care at Mayo Clinic - Mayo Clinic

fibrillation care at Mayo Clinic Multidisciplinary team. Mayo Clinic doctors trained in evaluating and treating cardiovascular diseases (cardiologists) and cardiovascular surgery (cardiovascular surgeons), as well as other doctors work closely to evaluate and treat people with atrial fibrillation and other heart rhythm conditions. Technology. Mayo Clinic doctors use the most current technology...

Symptoms and causes - Mayo Clinic

ew Tachycardia is a common type of heart rhythm disorder (arrhythmia) in which the heart beats faster than normal while at rest. It's normal for your heart rate to rise during exercise or as a physiological response to stress, trauma or illness (sinus tachycardia). But in tachycardia (tak-ih-KAHR-dee-uh), the heart beats faster than normal in the upper or lower chambers of the heart or both whi...

Atrial Fibrillation Diagnosis - Mayo Clinic

Atrial fibrillation - Request an appointment - Mayo Clinic

t an appointment By Mayo Clinic Staff Print Mayo Clinic works with hundreds of insurance companies and is an in-network provider for millions of people. In most cases, Mayo Clinic doesn't require a physician referral. Some insurers require referrals, or may have additional requirements for certain medical care. All appointments are prioritized on the basis of medical need. U.S. patients Online ...

Atrial Fibrillation Treatment at Mayo Clinic - Mayo Clinic

Patient education: Implantable cardioverter-defibrillators (Beyond the Basics)
Bradley P Knight

OVERVIEW It is estimated that 200,000 to 400,000 people die suddenly every year in the United States; the majority die as a result of heart rhythm abnormalities known as ventricular tachycardia (VT) or ventricular fibrillation (VF). Cardiac arrest, also known as sudden cardiac death, occurs when an abnormal and very rapid heart rhythm such as VT or VF prevents the heart from pumping normally to...

Patient education: Thyroid nodules (Beyond the Basics)
Douglas S Ross

OVERVIEW The thyroid is a butterfly-shaped gland in the middle of the neck, located below the larynx (voice box) and above the clavicles (collarbones) (figure 1). Thyroid nodules are round or oval-shaped areas within the thyroid (figure 2) that can be caused by a number of conditions, most of which are not serious. This topic discusses the tests that may be performed on thyroid nodules, as well...

Patient education: Wolff-Parkinson-White syndrome (Beyond the Basics)
Bradley P Knight

OVERVIEW Wolff-Parkinson-White (WPW) syndrome is a condition in which episodes of fast heart rate (called tachycardia) occur because of an abnormal extra electrical pathway in the heart. People with WPW may experience palpitations, dizziness, lightheadedness, and fainting, although some people with WPW have no symptoms. Treatments are available for those who do experience symptoms. The long-ter...

Patient education: Mitral regurgitation (Beyond the Basics)
William H Gaasch

MITRAL REGURGITATION OVERVIEW Mitral regurgitation (MR), which is also known as mitral insufficiency, is a common heart valve disorder. When MR is present, blood leaks backwards through the mitral valve when the heart contracts. This reduces the amount of blood that is pumped out to the body. This topic review discusses the causes, signs and symptoms, diagnosis, and treatment options for people...