Okay kiddo, the precordial examination is when a doctor listens to your heart using a special tool called a stethoscope. They put the stethoscope on your chest, right over where your heart is, and listen to the sounds it makes.
The doctor is listening for any unusual sounds that could mean there is a problem with your heart. They are also feeling your chest for any vibrations or sensations that could be a sign of a problem.
It's important to get a precordial examination because it helps the doctor know if your heart is healthy or if there is something that needs to be fixed. But don't worry, it doesn't hurt at all! In fact, it can be relaxing to hear the sound of your own heartbeat.