What is paroxysmal supraventricular tachycardia?
A person with paroxysmal supraventricular tachycardia has episodes of an abnormally rapid heart rate. Paroxysmal supraventricular tachycardia is caused by abnormal electrical activity in the heart. The abnormal electrical activity may be present at birth, or may be caused by heart disease.

What are the symptoms of paroxysmal supraventricular tachycardia?
Symptoms of paroxysmal supraventricular tachycardia may include rapid pulse, palpitations, difficulty breathing, chest pain, faintness, fainting, dizziness, and anxiety.

How does the doctor treat paroxysmal supraventricular tachycardia?
The initial treatment for paroxysmal supraventricular tachycardia includes medications to control the heart rate and rhythm. Additional treatment for paroxysmal supraventricular tachycardia may include avoiding stimulants, such as caffeine, alcohol, and decongestants that can accelerate the heart rate. In some cases, a cardiac pacemaker may be required to control paroxysmal supraventricular tachycardia.