IST episode today, registered 218bpm on heart rate monitor (had difficulty getting it to register but that's normal, even with hospital equipment at that rate). Have been slightly more frequent than normal, but not as frequent as they have been at their worst. Am able to stop them by using the Valsalva maneuver, no ER visits required, no adenosine or IST turning into VT episodes.
Some episodes are POTS like and are triggered by changes in posture and blood pressure.
Heart Rhythm Tracker