Heart arrhythmia - Symptoms and causes - Mayo Clinic
2023年10月13日 · A heart arrhythmia occurs when the electrical signals that tell the heart to beat don't work properly. The heart may beat too fast or too slow. Or the pattern of the heartbeat may be inconsistent.
Heart arrhythmia - Diagnosis and treatment - Mayo Clinic
2023年10月13日 · Heart arrhythmia treatment is usually only needed if the irregular heartbeat causes significant symptoms or puts you at risk of more-serious heart problems. Treatment for heart arrhythmias may include medicines, special actions called vagal maneuvers, procedures or …
Supraventricular tachycardia - Symptoms and causes - Mayo Clinic
2024年3月7日 · Supraventricular tachycardia (SVT) is a type of irregular heartbeat, also called an arrhythmia. It's a very fast or erratic heartbeat that affects the heart's upper chambers. SVT also is called paroxysmal supraventricular tachycardia.
Atrial fibrillation - Symptoms and causes - Mayo Clinic
2024年3月8日 · Atrial fibrillation (AFib) is an irregular and often very rapid heart rhythm. An irregular heart rhythm is called an arrhythmia. AFib can lead to blood clots in the heart. The condition also increases the risk of stroke, heart failure and other heart-related complications.
What is a heart arrhythmia? - Mayo Clinic News Network
2020年2月27日 · Types of arrhythmias. Doctors classify arrhythmias not only by where they originate (atria or ventricles) but also by the speed of heart rate they cause: Tachycardia (tak-ih-KAHR-dee-uh). This refers to a fast heartbeat — a resting heart rate greater than 100 beats a minute. Bradycardia (brad-e-KAHR-dee-uh).
Implantable cardioverter-defibrillators (ICDs) - Mayo Clinic
2023年8月15日 · An implantable cardioverter-defibrillator (ICD) is a small battery-powered device placed in the chest. It detects and stops irregular heartbeats, also called arrhythmias. An ICD continuously checks the heartbeat. It delivers electric shocks, when needed, to …
Tachycardia - Symptoms and causes - Mayo Clinic
2023年12月15日 · Many types of irregular heart rhythms, called arrhythmias, can cause tachycardia. A fast heart rate isn't always a concern. For instance, the heart rate usually rises during exercise or as a response to stress.
Ventricular tachycardia - Symptoms and causes - Mayo Clinic
2024年3月6日 · Ventricular tachycardia is a type of irregular heartbeat, called an arrhythmia. It starts in the lower chambers of the heart, called the ventricles. This condition also may be called V-tach or VT. A healthy heart typically beats about 60 to 100 times a minute at rest.
Ventricular fibrillation - Symptoms & causes - Mayo Clinic
2022年10月28日 · Ventricular fibrillation is a type of irregular heart rhythm (arrhythmia). During ventricular fibrillation, the lower heart chambers contract in a very rapid and uncoordinated manner. As a result, the heart doesn't pump blood to the rest of the body.
Heart disease - Symptoms and causes - Mayo Clinic
2024年8月13日 · Heart disease symptoms caused by irregular heartbeats, called arrhythmias. The heart may beat too quickly, too slowly or irregularly. Heart arrhythmia symptoms can include: Chest pain or discomfort. Dizziness. Fainting or almost fainting. Fluttering in the chest. Lightheadedness. Racing heartbeat. Shortness of breath. Slow heartbeat.