7 lines (6 with data), 248 Bytes

m041a 0 128 0 12:30:00 09/06/1990
# Start time=12:30
# First beat=12:32:16.296
# <age-range>: 60-64, <sex>: Male, <medication>: None
# <RR-low-limit(sec)>: 0.593,  <RR-high-limit(sec)>: 1.062
# Note: reel-to-reel recording, not flutter-compensated