7 lines (6 with data), 248 Bytes

m153a 0 128 0 15:00:00 15/11/1990
# Start time=15:00
# First beat=15:15:22.859
# <age-range>: 60-64, <sex>: Male, <medication>: None
# <RR-low-limit(sec)>: 0.437,  <RR-high-limit(sec)>: 0.804
# Note: reel-to-reel recording, not flutter-compensated