7 lines (6 with data), 247 Bytes

m149a 0 128 0 9:05:00 23/03/1989
# Start time=09:05
# First beat=09:59:39.335
# <age-range>: 65-69, <sex>: Male, <medication>: None
# <RR-low-limit(sec)>: 0.601,  <RR-high-limit(sec)>: 1.117
# Note: reel-to-reel recording, not flutter-compensated