7 lines (6 with data), 248 Bytes

m012a 0 128 0 16:00:00 19/08/1990
# Start time=16:00
# First beat=16:06:34.601
# <age-range>: 50-54, <sex>: Male, <medication>: None
# <RR-low-limit(sec)>: 0.507,  <RR-high-limit(sec)>: 0.992
# Note: reel-to-reel recording, not flutter-compensated