Atrial fibrillation - Symptoms and causes - Mayo Clinic
Jan 14, 2026 · 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 …
Tachycardia - Symptoms and causes - Mayo Clinic
Dec 15, 2023 · Atrial fibrillation, also called AFib. This is the most common type of tachycardia. Chaotic, irregular electrical signals start in the upper chambers of the heart, called the atria. These signals …
Atrial fibrillation - Diagnosis and treatment - Mayo Clinic
Jan 14, 2026 · Diagnosis Atrial fibrillation (AFib) may be diagnosed when a health checkup is done for another reason. To diagnose AFib, the healthcare professional examines you and listens to your …
Atrial flutter - Symptoms and causes - Mayo Clinic
Aug 29, 2024 · Atrial flutter is a type of heart rhythm disorder, called an arrhythmia. It is similar to atrial fibrillation (AFib). But in atrial flutter the heart rhythm is more organized and less chaotic than in AFib. …
Heart arrhythmia - Symptoms and causes - Mayo Clinic
Apr 23, 2026 · Blood-thinning medicines can lower the risk of stroke related to atrial fibrillation and other heart arrhythmias. If you have a heart arrhythmia, ask a healthcare professional if you need to take a …
Supraventricular tachycardia - Symptoms and causes - Mayo Clinic
Mar 7, 2024 · Inappropriate sinus tachycardia (IST). Multifocal atrial tachycardia (MAT). Junctional ectopic tachycardia (JET). Nonparoxysmal junctional tachycardia (NPJT). Symptoms The main …
Atrial septal defect (ASD) - Symptoms and causes - Mayo Clinic
Jan 23, 2024 · A large, long-term atrial septal defect can damage the heart and lungs. Surgery may be needed to repair an atrial septal defect and to prevent complications. Types Types of atrial septal …
Atrial fibrillation ablation - Mayo Clinic
Apr 9, 2024 · Overview Atrial fibrillation ablation is a treatment for an irregular and often very fast heartbeat called atrial fibrillation (AFib). The treatment uses heat or cold energy to create tiny scars …
Electrocardiogram (ECG or EKG) - Mayo Clinic
Apr 2, 2024 · An electrocardiogram (ECG or EKG) is a quick test to check the heartbeat. It records the electrical signals in the heart. Test results can help diagnose heart attacks and irregular heartbeats, …
Mayo Clinic corrected QT interval (QTc) calculator - Medical ...
Worried about QT interval prolongation? This online evidence based resource will help guide you how to measure the QT interval and calculate the QTc value with an easy to use calculator which takes into …