It may vary from state to state. In California, the old rule stated that records be kept for 7 years, though that seems to have been changed. In general, insurance rules and so on seem to dictate that doctors keep records for 2-3 years at least. It's been a year for you and your wife, so stay on top of this.
Also in my state, if the patient makes a *written* request for copies, the doc must comply within a specified period, though you may have to pay for copies (BTW, the date of any exam plus the signature of the doctor should at the bottom of each report).
To see what the rules are in your state, type something like 'medical records Nevada (or wherever) FAQ '
For faster and clearer answers, though, you could (ahem) see a lawyer.
I think you're getting worked up about nothing. It is not unusual to have these done as part of an annual physical, some doctors are more thorough than others. The fact that she did the same for your wife makes me think this is her policy but in any case it's a good idea to include. All of these would be done with the echo, did the do a any kind of procedure on you during those 30 mins? They would have put some lube on your upper abdomen and use a scanner like object over it. The EKG would have come from that as well as the duplex.
There's nothing alarming in these numbers that I see, but I'm not a doctor. To me everything looks to be within a normal variant but you need to ask her to explain this report to you.