Multifocal Atrial Tachycardia (MAT)

Multifocal Atrial Tachycardia (MAT) is a type of abnormal heart rhythm that affects the atria, the upper chambers of the heart. It causes the heart to beat very fast and irregularly due to multiple areas in the atria sending electrical signals. This condition mainly affects the cardiovascular system and can lead to symptoms like palpitations, shortness of breath, and fatigue. MAT is often seen in people with underlying lung diseases or other medical problems. The irregular heartbeats can reduce the heart’s efficiency, impacting blood flow and oxygen delivery to the body. It is important to identify and understand this condition because it can complicate other health issues.

Multifocal Atrial Tachycardia (MAT) is a supraventricular tachyarrhythmia characterized by the presence of at least three distinct P wave morphologies on electrocardiogram, reflecting multiple ectopic atrial foci. It results from increased automaticity or triggered activity in the atria, often due to hypoxia, electrolyte imbalances, or underlying pulmonary disease such as chronic obstructive pulmonary disease (COPD). The atrial rate is typically over 100 beats per minute with an irregular ventricular response. MAT is clinically significant because it can cause hemodynamic instability and is frequently associated with severe systemic illness. It differs from atrial fibrillation by the presence of discrete P waves and from atrial flutter by the irregularity and multiple morphologies. Recognition of MAT is important for guiding management and addressing underlying causes.