You may send an EKG recording out for review by a board certified cardiologist or trained cardiac technician for an out-of-pocket fee.
In the U.S. a comprehensive review and recommendation by a board certified cardiologist is $19 with a response within 24 hours, and a quick interpretation by a trained cardiac technician is $9 with a response within 1 hour.
Clinician reviews are not available in every country.