7 lines (6 with data), 248 Bytes

m162a 0 128 0 11:30:00 07/07/1989
# Start time=11:30
# First beat=11:37:33.578
# <age-range>: 60-64, <sex>: Male, <medication>: None
# <RR-low-limit(sec)>: 0.445,  <RR-high-limit(sec)>: 1.195
# Note: reel-to-reel recording, not flutter-compensated