Heart arrhythmias

In-Depth

Vasovagal syncope Vasovagal syncope — Comprehensive overview covers symptoms, treatment of sudden, brief loss of consciousness.
Symptom Checker Use this Symptom Checker to pinpoint possible causes of your medical symptoms.

Electrocardiogram (ECG or EKG) Electrocardiogram (ECG or EKG) — Overview covers definition of this test to monitor your heartbeat.
Tilt table test Tilt table test — Overview covers definition, what to expect and results of this test.
Stress test A stress test — Overview covers what to expect and results of this heart test.
Holter monitor Holter monitor — Overview covers what to expect during this test of your heart rhythm.

Hyperthyroidism (overactive thyroid) Hyperthyroidism — Comprehensive overview covers symptoms, causes, treatment of an overactive thyroid gland.
Long QT syndrome Long QT syndrome — Comprehensive overview covers causes and treatment of this racing heart condition.

Cardioversion Cardioversion — Overview covers what to expect during this procedure to reset your heart's rhythm.
Cardiac ablation Cardiac ablation — Overview covers risks, results of this surgery to correct heart rhythm problems.
Implantable cardioverter-defibrillators (ICDs) Implantable cardioverter-defibrillators (ICDs) — Overview covers the definition and risks of implanting these devices.
Pacemaker Pacemaker — Overview covers risks, results of the procedure to install this heartbeat-regulating device.

Automated external defibrillators: Do you need an AED? Automated external defibrillators are available without a prescription. Should you get one?

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