What is the remedy for high rate heart beat in children less than twelve years old?

The remedy for high heart rate in children under twelve years old depends on the underlying cause. Common causes include:

1. Sinus Tachycardia: This is the most common type of fast heart rate in children and is usually harmless. It can be caused by fever, exercise, emotional stress, or dehydration. Treatment typically involves addressing the underlying cause and monitoring the heart rate to ensure it returns to normal.

2. Supraventricular Tachycardia (SVT): This is a type of abnormal heart rhythm that originates in the upper chambers of the heart. It can cause a rapid heart rate, palpitations, and shortness of breath. Treatment options include medications, catheter ablation, and surgery.

3. Ventricular Tachycardia (VT): This is a type of abnormal heart rhythm that originates in the lower chambers of the heart. It can be more serious than SVT and can cause symptoms such as chest pain, shortness of breath, and fainting. Treatment options include medications, catheter ablation, and surgery.

4. Congenital Heart Defects: Certain heart defects present at birth can cause a fast heart rate. Treatment depends on the specific defect and may involve surgery or other interventions.

It's important for a doctor to evaluate a child's heart rate and determine the underlying cause in order to provide the appropriate treatment.