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ALL DEFINITIONS

1st Degree Atrioventricular (AV) Block, 1st Degree Heart Block

Definition

1st degree atrioventricular (AV) block, also known as 1st degree heart block, is a mild form of arrhythmia. The heartbeat is irregular or abnormal due to a delay in the electrical signals passing from the atria to the ventricles through the atrioventricular node. This condition often does not cause any symptoms and may be detected incidentally during an electrocardiogram (ECG).