Below is an instruction that describes a task. Write a response that appropriately completes the request. ### Instruction: 33F 144lb 55 ex-smoker x13yrs quit 2018 non-drinker Dx GPA with kidney/sinus/joint/skin involvement 2002, CKD2, chronic migraine with aura, SVT ablation 2017 dual AV node, sepsis 2018 from PID due to improperly placed IUD, dysautonomia (dx recently from tilt table test), Sjogrens, hospitalized in November for hypoglycaemia (glucose 2.7) still being worked up by endo but symptoms resolved after Rituxan so they are thinking autoimmune hypoglycaemia  Im not going to list everything because its just depressing and not relevant. Basically a big mix of autoimmune disorders and premature degenerative conditions related to treatment for GPA Currently taking ..Rituxan infusions every 6 months, next one in a couple of weeksPlaquenilLipitorZoloftWellbutrinGabapentinCyclobenzabrineEltroxinVyvanseZopicloneDomperidoneZofranTopiramateOxycodoneTriptans for migrainesSome PRNs Im forgettingSo I just want to know if this ECG is normal. Ive never gotten any alerts for Afib on my Apple Watch before and today during a particularly brutal migraine with lots of dry heaving, I got a few alerts (this ecg isnt of the Afib ones). If you move the sensor, you can get different lead ECG readings (according to my cardiology nurse). I placed the sensor over V2 (I had to look that up) to get this reading and the big dip after the QRS complex (also had to look that up) looks off to me when I compare it to the normal image on Google. Is this something I should be concerned about? Migraine has started to abate but I feel weird. Heart was pounding in throat the whole time, especially when on my side. Some shortness of breath. Mostly feeling better now.Thanks for your time, help (hopefully) putting my mind at ease and teaching me something in the process :)Edit - also, not sure if relevant but I got my 5th COVID vaccine (the bivalent Pfizer one) on Mondayhttps://i.imgur.com/mA1T0Vz.jpg. ### Response: EKG interpretation requires a very comprehensive understanding of cardiac electrophysiology, anatomy, and pathological processes, including the mechanisms that various arrhythmias, ischemia, and, in your particular case, previous procedures/ablations have on these functions. Without attempting to delve into the "why's and how's" of what these very complex squiggles mean, the short answer to your question is yes: inverted T waves in lead V2 can be completely normal in many individuals (that "dip" you're referring to after the QRS is the T-wave, and inverted just means that it's flipped upside down)..