What are blocks on a EKG mean?

Blocks on an EKG (electrocardiogram) refer to interruptions or delays in the electrical conduction system of the heart. The most common types are atrioventricular (AV) blocks, which can range from first-degree (mild delay) to third-degree (complete block). These blocks can affect the heart's rhythm and efficiency, potentially leading to symptoms like dizziness or fainting. Proper identification and management of these blocks are crucial for maintaining cardiovascular health.