Yeah, you can go out of the country. It may be beneficial to take some medications with you though.. Such as aspirin/plavix or brilinta, a statin such as lipitor and sublingual nitroglycerin.
The sooner you get treated the better though.
To summarize what it means... You have cad.. You have a blockage in an obtuse marginal (small branch coming off the circumflex).
This impairs your heart function by about 5% and if you were to get a stent this would go away.
In terms of treatment you need to go on medications to keep the disease from getting worse, to treat chest pain and to protect from a future heart attack.. I mentioned some examples of these in the previous post. The sooner you get on medical management the better.
Coronary angiography or stenting may he necessary, particuarly if you're symptomatic.
The reason I mention getting treated asap is not because of severity, but because the heart muscle is still viable now, so the sooner its open the more of that 5% you can recover.