Bloqueo cardiaco

At the Montefiore Einstein Center for Heart and Vascular Care, you can access exceptional care for heart block arrhythmia. As a global leader in cardiovascular medicine and surgery, we are an academic-based, national and international referral site for high-risk and complex cases. For more than a century, we have been at the forefront in treating heart disease.

Según U.S. News & World Report, Montefiore Einstein se encuentra entre el uno por ciento de los mejores hospitales del país en cardiología, cirugía cardíaca y vascular. Nuestros especialistas se apasionan por descubrir los últimos enfoques de diagnóstico y tratamientos que pueden mejorar los resultados. Con el respaldo de un equipo multidisciplinario de especialistas, Montefiore Einstein continúa logrando avances en el tratamiento de enfermedades cardíacas. En los últimos años, hemos ampliado nuestros programas en imágenes cardíacas avanzadas, insuficiencia cardíaca y medicina cardiovascular intervencionista y hemos reunido un equipo de cirugía cardiotorácica de renombre mundial.

Cuando nos confía sus cuidados, puede esperar planes de tratamiento compasivos y personalizados que cumplen con los más altos estándares de calidad y seguridad. Además, ofrecemos a los pacientes una amplia variedad de servicios de apoyo, desde orientación nutricional hasta terapias de rehabilitación.

When you need heart block arrhythmia care, turn to our dedicated providers who will develop a highly personalized treatment plan specific to you.

Montefiore Einstein ofrece el siguiente contenido de la biblioteca de información de salud de Healthwise.

What is heart block?

Heart block refers to an abnormality in the way electricity passes through the normal electrical pathways of the heart. The abnormality "blocks" the electrical impulse from continuing through the normal pathways and usually results in a slower heart rate.

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 may occur at any point along this electrical pathway.

¿Cuál es la causa?

Heart block can be caused by many things that affect the electrical system of the heart. Examples include:

  • Scarring (fibrosis) of the heart’s electrical system, which may be related to aging. This is a common cause of heart block.
  • Heart attacks
  • Infecciones
  • Miocarditis
  • Congenital heart disease
  • Use of certain medicines, such as beta-blockers, calcium channel blockers, and digoxin
  • Heart surgery or heart catheter procedures

Heart block is more common in older people and may be the result of age and a combination of factors listed above.

What are the types?

Heart block of the atrioventricular (AV) node can be of several types, and a doctor generally can diagnose these by looking at the person’s electrocardiogram (EKG, ECG).

First-degree AV block

In first-degree block, the electrical impulses take longer to travel between the upper chamber (atrium) and lower chamber (ventricle) of the heart. This type of heart rhythm may or may not be associated with a slow heart rate.

It does not usually require treatment. But this type of heart block may raise your risk of heart rhythm problems, such as atrial fibrillation.

Second-degree AV block

In second-degree heart block, some of the electrical impulses are blocked between the upper and lower chamber of the heart. These electrical impulses may or may not have a clear pattern. The blocking of the impulse can come and go, resulting in "dropped heartbeats."

Second-degree heart block can be categorized into two types:

  • Mobitz type I block (also called Wenckebach) usually occurs in the AV node. It can happen in young, healthy people. It may also be caused by certain medicines or health conditions. It usually does not cause symptoms.
  • Mobitz type II block usually occurs below the AV node in other conduction tissue. It can happen in people who have heart disease or have had a heart attack. It can also be caused by certain medicines or a heart procedure. It may cause lightheadedness or fainting (syncope). And it may progress to complete heart block.

How second-degree AV block is treated can depend on the type and what is causing it. Treatment can also depend on your symptoms. Treatment may be a pacemaker. If heart block doesn’t cause symptoms, it may not be treated.

Complete or third-degree block

In third-degree heart block, all of the electrical impulses are completely blocked between the upper and lower chambers of the heart. When this occurs, the atria and ventricles beat at completely different rates.

Complete heart block can be caused by many things. These include scarring of the electrical system of the heart, certain heart diseases, and infections. It may also occur after a heart surgery or heart procedure. It can be present from birth (congenital).

Complete heart block can cause symptoms such as shortness of breath, lightheadedness, or fainting. Treatment is typically a pacemaker.

Bundle branch block

Bundle branch block can affect the heart’s rhythm. The heart has structures, like wires, that are called bundle branches. They are part of the heart’s electrical pathway. When a branch is diseased, it is called "blocked," because the electrical signals can’t travel down the branch.

Some people with bundle branch block don’t have any symptoms and don’t need treatment. But when a block causes the heart to beat too slowly, it can cause symptoms such as tiredness and fainting. A pacemaker may be used to get the heartbeat back to normal.