Supra-ventricular tachycardia. Essentially, any arrhythmia that results in a heart rate higher than 100 originating in, and taking place in, either of the two smaller chambers atop the heart...above the two large ventricles. Tachycardia is an arrhythmia. Also included are atrial fibrillation, premature atrial complexes, and flutter.

SVT = SupraVentricular Tachycardia. (for me, palpitations). Since my last post, friends have suggested the Apple Series 9 and 10 may become outdated and not be supported by Apple upgrades. They suggested getting a newer Apple series Series 16+ and then trying purchasing a ECG app for it to monitor my arrhythmia 24/7. Does anyone know it that is possible?