7 lines (6 with data), 248 Bytes

m152a 0 128 0 14:50:00 21/10/1989
# Start time=14:50
# First beat=14:54:45.171
# <age-range>: 65-69, <sex>: Male, <medication>: None
# <RR-low-limit(sec)>: 0.453,  <RR-high-limit(sec)>: 0.773
# Note: reel-to-reel recording, not flutter-compensated