Triggered activity arrhythmia is an abnormal heart rhythm caused by increased electrical activity in the heart. It occurs when the electrical signals that cause the heart to beat become too weak or are blocked, leading to an irregular heartbeat. Examples of triggered activity arrhythmia include atrial fibrillation (AFib), ventricular tachycardia (VT) and ventricular fibrillation (VF).
Atrial fibrillation (AFib) is the most common type of triggered activity arrhythmia and is characterized by a rapid, disorganized heart rhythm due to an electrical signal that originates in the atria (the upper chambers of the heart). This irregular rhythm can cause the heart to beat faster than normal and can lead to symptoms such as lightheadedness, shortness of breath, chest pain, and fatigue.
Ventricular tachycardia (VT) is another type of triggered activity arrhythmia and is characterized by a rapid, regular heart rhythm due to an electrical signal that originates in the ventricles (the lower chambers of the heart). While VT is usually not life-threatening, it can cause symptoms such as dizziness, chest pain, and shortness of breath.
Ventricular fibrillation (VF) is the most serious form of triggered activity arrhythmia and is characterized by a chaotic, disorganized heart rhythm due to an electrical signal that originates in the ventricles. VF can lead to sudden cardiac arrest, which can be fatal if not treated immediately.
Triggered activity arrhythmias can be caused by a variety of factors, including coronary artery disease, high blood pressure, smoking, and use of certain medications. Treatment for these arrhythmias may involve medications, lifestyle changes, or procedures such as ablation or implantation of a pacemaker or defibrillator.