X-rays? I suspect that is how they found the tumor in the first place.
EKG tests? Let's make sure your heart doesn't have some underlying dysrhythmia before surgery.
Echocardiogram? Was something wrong with the EKG? You need an echo so you can be placed on appropriate medications before surgery. It is better to get tuned up before you get on the table than crash during surgery.
Blood tests? Ummm, let's find out if you are anemic, hyponatremic before surgery. Let's also make sure your don't have any bleeding problems before the knife touches your skin.
“EKG tests, echocardiograms”
More than one of each?
All good arguments. But I am willing to bet that none of these health care workers conveyed any of that information to him.