Okay, this type of vigilance is something you need to reflect upon because it is very characteristic of persons suffering from significant anxiety, particularly where questions of their heath are concerned. When you say you're not convinced, it speaks to the fact that you are dismissing the facts of logic in favor of irrational fears.

Your symptoms are not being caused by the presence of atherosclerotic plaque or other cardiopathology. An echocardiogram assesses the physical integrity of the heart muscle and examines all aspects of muscle function.

Your symptoms are benign and nothing is being overlooked. Seeking reassurance can become a lifelong pursuit if the extent of your fears reaches farther than the ability of medical science to subdue it.

You're going to be just fine and you have a long life ahead.

Best regards,

Rutheford Rane, MD (ret.)