A possible explanation

We discover that Bill Frist's "blind" trust wasn't. In fact, he was regularly updated as to stock moves and prices during all the times he was claiming it was Stevie Wonder-ed. This raises more than a little conflict of interest, since Dr. Frist often voted on bills that could affect the stocks in his portfolio. Now, I'm not saying the man who diagnosed Terri Schaivo via videotape could allow his self interest to override his morals. Why would I? (/sarcasm) In fact, I think there is a reasonable and likely explanation that can explain both that VHS reading and this quote:

"I think really for our viewers it should be understood that I put this into a blind trust," Frist replied. "So as far as I know, I own no HCA stock." He added that the trust was "totally blind. I have no control."
Two weeks before that interview, M. Kirk Scobey Jr., a Frist trustee, informed the senator in writing that one of his trusts had received HCA stock valued at between $15,000 and $50,000.

And the answer is...DR. FRIST IS A BAD DOCTOR.

See, he skipped that day in medical school when eye problems were covered and doesn't know what "blind" meant. Heck, even being a bad doctor, he's a heart surgeon anyway ("Nurse, we're ready to begin, now, where's the chest?") so eyes are AT LEAST a few inches away for his concern and expertise anyway. I mean, do you expect a proctologist to know about athlete's foot, barring some limber sex play? Or do you really think that an ear, nose and throat doctor would have the knowledge to diagnose a knife in the chest? Please.

Of course, there is the logic puzzle of if Mr. "VHS" Frist didn't KNOW he had HCA stock, how could he have directed his stockbroker to SELL said HCA stock (paging Uri Gellar, stockbroker!)...but Dr. Frist isn't a logician either, so we can excuse him that as well.

So Frist is either a bad doctor or a bad liar. Or both.