00735	Signals unavailable
03665	Signals unavailable
04043	Block 39 is unreadable
04936	(this was the only record for which signals were previously available)
05091	Corrected QRS annotations are available (annotator qrsc)
06453	Recording ends after about 9 hours, 15 minutes
08378	No start time
08405	No start time; block 1067 is unreadable
08434	Blocks 648, 857, and 894 are unreadable
08455	No start time