a b/mit-bih-ecg-compression-test-database-1.0.0/13687_04.hea- 

  1
  
13687_04 2 250 5120





  
  

  2
  
13687_04.dat 212 400 12 0 -56 14831 0 ECG signal 0





  
  

  3
  
13687_04.dat 212 400 12 0 242 -3502 0 ECG signal 1