@jimcullen Hi and Welcome to connect. I've had many 12 lead ECGs and the results are usually handed to the Doctor immediately. But based on the information given I can't say if it's a urgent situation but I can let you know that most technicians giving the test are a little knowledgeable about what is urgent and or can wait to be evaluated by a specialist . I thru my experience when I would ask how it looks would get the response "well I'm not allowed to say as I'm not a doctor but if I run out of here urgently might give you a clue. Even EMTs are trained enough to recognize life threatening verses is not an issue or can wait for a follow-up at a later time. I would have some confidence that if the Doctor hasn't either said anything yet or has not called for a follow-up it's probally not urgent.
Now as for the passing out I would tho follow-up and maybe seek an appointment with a cardiologist. Never hurts to know for sure. I hope that sets your mind at ease. Please let's us know how things turn n out and I went thru years of Heart issues so if I can help with any questions please let me know.
Have a Blessed Day