Donât worry too much about the ECG report.Since your recent Echo and TMT were both normal, its likely just a technical error. Because of the chest hair, the leads probably didn't stick properly, which often gives a slightly off reading. In your case, since your heart tests are clean, this finding isn't actually a cause for concern. That burning sensation from your jaw to your stomach, along with the acid in your mouth, sounds like a case of severe acidity or GERD.
The heart and the food pipe share similar nerve paths, so acid reflux can often feel like heart pain.
Next Steps
You should now consult Gastroenterologist to manage this acidity. Also, if you ever need another ECG, just ask them to shave small patches so the leads sit perfectly.
Health Tips
if the pain ever feels like heavy crushing pressure instead of burning, or if you feel breathless and sweaty, then head back to the ER immediately. Otherwise, you should be fine once the acidity is treated.