Have you ever heard your heart beating inside your chest? Your heart has four parts, and two of them are called the atria. An "atrial cross" is a special tool that doctors use to see inside the atria of your heart when they need to fix a problem.
The atrial cross looks like a long, skinny stick with a ball on the end. The ball is actually a tiny camera that takes pictures of what's going on inside your heart. Doctors use the atrial cross to look for things like blood clots or a hole in your heart that needs to be fixed.
Before using the atrial cross, doctors will give you medicine to make sure you can't feel anything or move during the procedure. Then, they'll insert the cross into your body through a small incision and carefully guide it to your heart.
Once the atrial cross is inside your heart, the doctor can move it around to take different pictures and see if there are any problems. They might use other tools along with the atrial cross to fix any issues they find.
Although it might seem scary, your doctor will make sure you are safe and comfortable during the procedure. And once it's done, you'll feel much better knowing that your heart is healthy and working properly!