7 lines (6 with data), 248 Bytes

m222a 0 128 0 11:22:00 08/05/1990
# Start time=11:22
# First beat=11:23:24.617
# <age-range>: 55-59, <sex>: Male, <medication>: None
# <RR-low-limit(sec)>: 0.546,  <RR-high-limit(sec)>: 1.835
# Note: reel-to-reel recording, not flutter-compensated