7 lines (6 with data), 248 Bytes

m081a 0 128 0 15:25:00 15/12/1989
# Start time=15:25
# First beat=15:35:13.195
# <age-range>: 60-64, <sex>: Male, <medication>: None
# <RR-low-limit(sec)>: 0.453,  <RR-high-limit(sec)>: 0.781
# Note: reel-to-reel recording, not flutter-compensated