7 lines (6 with data), 248 Bytes

m193a 0 128 0 15:37:00 31/05/1991
# Start time=15:37
# First beat=15:42:35.781
# <age-range>: 60-64, <sex>: Male, <medication>: None
# <RR-low-limit(sec)>: 0.414,  <RR-high-limit(sec)>: 1.046
# Note: reel-to-reel recording, not flutter-compensated