Northfield High School student Evan Loe provides information about the Play for Patrick heart screening, which is a free heart screen for young adults ages 14-24, April 20, 9am-5pm at Northfield Middle School. Register on Play For Patrick. Heart screens include checking of; Height/Weight, Blood Pressure, EKG (electrical current of the heart), Echocardiogram (video of the structure of the heart), Physician consultation and hands only CPR & AED training.