Doctors at Morozov Hospital have developed and patented an effective method for diagnosing pediatric stroke. The "Bubble Test" is a type of echocardiography performed using ultrasound. It helps detect openings between the heart chambers. For the test, specific breathing movements are required, which is why it was previously only performed on adults. Doctors in the emergency cardiac surgery and interventional cardiology department have developed a special technique that allows this procedure to be performed on young children. Specialists inject a test solution, artificially increase heart pressure, and use ultrasound to detect the presence of microbubbles in the heart. This provides an opportunity to prevent serious illness in the future.