
What could this possibly be?
This is a lead 1 of a phenomenon Ive documented few times reliably. Everytime I get an adrenaline surge when Im startled for example or nervous I get palpitations and this ecg change where a small negative deflection appears on the end of the st segement. It literally appears consistently as soon as I feel the adrenaline surge and then disappears as it wears off.
Could it be a t wave inversion? Maybe U waves? Its very pronounced on the watch and its not an artifact because it appears and disappears consistently. You can see it happening at the beginning there and then slowly disappear. Im not asking for a diagnosis just opinions on what that looks like. On a v2 it also looks like a tiny negative wave between a t wave and an u wave. This is a new phenomenon as well that started happening last few months.
Maybe just a normal response to sudden adrenaline release producing transient t wave flattening/inversion/u wave