It depends upon his condition and reports if it is a major Heart Attack and his heart is already week then it is very risky to shift him from any facility and he might collapse in the way but on the other hand without without a proper facility you will never know what is the exact status of his heart and how much is the blockage in the blood vessels so I will suggest you to try and ask for a case summary from your doctor and collect all the reports which you can and send them over to a cardiologist nearby then decide what next step is best for your patient.. All this should be done as soon as possible preferably in the next few hours