7 lines (6 with data), 254 Bytes

m256b 0 128 0 10:17:00 30/04/1991
# Start time=10:17
# First beat=10:21:38.195
# <age-range>: 55-59, <sex>: Male, <medication>: Moricizine
# <RR-low-limit(sec)>: 0.312,  <RR-high-limit(sec)>: 1.039
# Note: reel-to-reel recording, not flutter-compensated