What causes heart nerve blockage?


The pounding of your heart is controlled by electrical signals. Conduction is the method by which they inform your heart muscle when to contract. Normal heartbeat timing is generated in the upper chambers of the heart (atria) by a mechanism known as the sinus node. When you have a heart block, the electrical signals that normally travel from the atria to the ventricles are disrupted.

Congenital heart block occurs when a heart block is present at birth. This condition is caused by either a disorder your mother had throughout her pregnancy or heart abnormalities you were born with. Most people acquire heart block as they get older because the wires that connect the top and bottom of the heart can deteriorate and eventually collapse. Sometimes this happens as we become older.  Any process that damages these heart wires can cause a heart block.

Coronary artery disease, both with and without a heart attack, is one of the most common causes of heart block.  Cardiomyopathies, or disorders that weaken the heart muscle, can also cause wire damage.  Any disease that can infiltrate the heart, such as sarcoidosis and certain malignancies, or any disease that causes cardiac inflammation, such as some autoimmune diseases or infections, can cause heart block. Wire failure can also be caused by electrolyte imbalances, particularly excessive potassium levels.

Symptoms of heart block:

Symptoms depend on the type of heart block you have:

First-degree heart block may have no bothersome symptoms.

Second-degree heart block might cause:

  • Dizziness
  • Fainting
  • The feeling that your heart skips beats
  • Chest pain
  • Trouble breathing or shortness of breath
  • Nausea
  • Fatigue
Third-degree heart block, which can be fatal, might cause:

  • Intense tiredness
  • Irregular heartbeats
  • Dizziness
  • Fainting
  • Cardiac arrest

Heart block prevention relies mostly on risk factor management. A healthy lifestyle improves general health, including heart health. Exercise regularly, consume a well-balanced diet, and avoid smoking. Understanding the hazards of your medications and discussing them with your doctor can help lower the chance of medicine-induced heart block.

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