Junctional tachycardia is a cardiac arrhythmia that occurs when the heart's electrical signals originate from a different location than the sinus node. Common synonyms for junctional tachycardia include accelerated junctional rhythm, junctional ectopic tachycardia, and junctional tachyarrhythmia. Other related terms include supraventricular tachycardia (SVT), which encompasses a range of rapid heart rhythms originating above the ventricles, and atrial tachycardia, which occurs when the electrical signals originate from the atria. Symptoms of junctional tachycardia may include palpitations, chest pain, shortness of breath, and dizziness. Treatment options may include medication, electrical cardioversion, or catheter ablation.