Skip to main content
Go to homepage

Heart: Arrhythmias

  • Arrhythmia (Abnormal Heartbeat) Arrhythmia (Abnormal Heartbeat)

    An arrhythmia is an abnormal heartbeat usually caused by an electrical "short circuit" in the heart. Many are minor and not a health threat, but some can indicate a more serious problem.

  • Long QT Syndrome Long QT Syndrome

    Long QT syndrome (LQTS) is a condition that affects the electrical system of the heart. Some kids have no symptoms, while others may feel changes in their heartbeat or feel lightheaded.

  • Postural Orthostatic Tachycardia Syndrome (POTS) Postural Orthostatic Tachycardia Syndrome (POTS)

    Postural orthostatic tachycardia syndrome (POTS) happens when the autonomic nervous system — which controls things like heart rate, blood pressure, and breathing — doesn't work as it should.

  • Supraventricular Tachycardia (SVT) Supraventricular Tachycardia (SVT)

    Supraventricular tachycardia is a type of abnormal heart rhythm in which the heart beats very quickly.

What next?