Those pictures are from the Prague show (techno.cz is a Czech dance music site) and that was two days before the heart surgery. David played only for half an hour and then left, returned for a few songs & left again, this time for real.
On a "positive" note, his performance of The Man Who Sold The World (last song that night), which he sang obviously in pain, was quite strong.
"I don't post here, but i like to come sometimes.."
~ sweet Bibi