After seeing the fully uncut Shriek Show tape and DVD several times; I decided to pop in the olden Paragon VHS of the American recut, re-titled Doctor Butcher M.D, running at 82 minutes. This version has a number of alterations; including a tacked-on unrelated opening sequence presumably directed by Roy Frumkes (of Document of the Dead fame), a loopy cartoonish score in place of the original, and the short inconsequential "trap" sequence included only as an extra on the Shriek Show editions (video here) included in the feature. The new score is extremely annoying, often being the same five second funky '70s guitar twangs and backbeat played over long stretches. Oddly, at times you can actually hear the original music playing when actors speak with the new music being over top it all.
There's also an audio fix when the black nurse discovers the mutilated cadaver. On the Shriek Shows, her scream is looped twice in quick succession to hilarious effect. On this Paragon tape, she only screams once, but the suicidal male nurse's arm still rockets off upon hitting the concrete. One thing I didn't notice were any obvious cuts to the gore from what I remember in the uncut version; eyes are graphically gouged, throats slit, guts torn out, and zombie heads outboard motored. This is strange since a number of sources say this tape has cuts to such violence. Gore looks so wonderful on 25-year-old tapes!
Here's the Frumkes opening sequence from YouTube, SNUFF MAXIMUS!