Sinoatrial arrest

Sinoatrial arrest is a medical condition characterized by a pause in the normal rhythm of the heart due to a failure in the sinoatrial node (SA node), the natural pacemaker of the heart. This condition is also known as sinus arrest or sinus pause.

Causes

The causes of sinoatrial arrest can be divided into intrinsic and extrinsic factors. Intrinsic factors are those related to the SA node itself, such as aging, ischemia, inflammation, and fibrosis. Extrinsic factors are those that affect the SA node indirectly, such as certain medications, electrolyte imbalances, and autonomic nervous system disorders.

Symptoms

The symptoms of sinoatrial arrest can vary greatly depending on the duration of the pause and the overall health of the individual. Some people may not experience any symptoms, while others may experience dizziness, fainting, fatigue, shortness of breath, or chest pain.

Diagnosis

The diagnosis of sinoatrial arrest is typically made through an electrocardiogram (ECG), which can detect the pause in the heart rhythm. Other tests may be used to rule out other causes of the symptoms, such as a stress test, echocardiogram, or Holter monitor.

Treatment

The treatment for sinoatrial arrest depends on the cause and severity of the condition. In some cases, no treatment may be necessary. In other cases, treatment may involve adjusting medications, treating underlying conditions, or implanting a pacemaker.

See also

• Sinoatrial node
• Electrocardiogram
• Pacemaker

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