Today's interesting fact has to do with Echocardiograms.

An Echocardiogram is a sound picture of the heart.

Until recently, it displayed slices of the heart to allow doctors to see if you have issues with the heart.

With the increased computer power available, three dimensional images and even movies have been created.

It can also show blood flow and can pinpoint where arteries are clogged.

It is usually known as an Echo, as ECG usually refers to an Electrocardiogram.

I have just had one and can confirm that it doesn't hurt.