Yes absolutely, I have had those pesky ECG machines print out saying I was dead on numerous occasions. Numerous times saying I am or just had or having a heart attack.
I never knew the machines had an issue with me until 15+ years after my first medical, and it was explained to me what they were seeing is normal for me, it is the same every time.
It takes some skill to understand what those print outs actually say, that is where the specialist comes in. What the machine says is abnormal maybe normal for 30% of the population.
On the plus side, if they have identified a real issue, that may have saved your life.