7 lines (6 with data), 248 Bytes

m207a 0 128 0 14:36:00 15/04/1990
# Start time=14:36
# First beat=14:39:38.117
# <age-range>: 70-74, <sex>: Male, <medication>: None
# <RR-low-limit(sec)>: 0.671,  <RR-high-limit(sec)>: 1.601
# Note: reel-to-reel recording, not flutter-compensated