You and your doctor can decide what treatment is right for you. If heart block doesn't cause symptoms, it may not be treated. Treatment can also depend on your symptoms. How second-degree AV block is treated can depend on the type and what is causing it. And it may progress to complete heart block.

It may cause light-headedness or fainting ( syncope). It is also seen in people with significant heart disease or during a large heart attack. Mobitz type II block usually occurs below the AV node in other conduction tissue.It is common in young, healthy people (especially during sleep). Mobitz type I block (also called Wenckebach) usually occurs in the AV node.Second-degree heart block can be categorized into two types: The blocking of the impulse can come and go, resulting in 'dropped heartbeats.' A second-degree type II block may progress to complete or third-degree heart block. These electrical impulses may or may not have a clear pattern. In second-degree heart block, some of the electrical impulses are blocked between the upper and lower chamber of the heart. But this type of heart block may raise your risk of heart rhythm problems, such as atrial fibrillation. This type of heart rhythm may or may not be associated with a slow heart rate. In first-degree block, the electrical impulses take longer to travel between the upper chamber (atrium) and lower chamber (ventricle) of the heart. Heart block of the AV node can be of several types, and a doctor generally can diagnose these by looking at the person's electrocardiogram (EKG, ECG). Heart block may occur at any point along this electrical pathway. The electrical activity of the heart starts in the sinoatrial (SA) node in the upper chamber (atrium) and travels through the atrioventricular (AV) node to reach the lower chamber (ventricle). Heart block is more common in older people and may be the result of age and a combination of factors listed above. Use of certain medicines, especially beta-blockers, calcium channel blockers, and digoxin.Infection of the heart valves ( endocarditis).This is the most common cause of heart block. Scarring (fibrosis) of the heart's electrical system caused by aging.

Heart block can be caused by many things that affect the electrical system of the heart. The abnormality 'blocks' the electrical impulse from continuing through the normal pathways and usually results in a slower heart rate. Heart block refers to an abnormality in the way electricity passes through the normal electrical pathways of the heart.

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