text: Yo, check it out, I got an algorithm to shout,
  For detecting ECG changes, no doubt.
  Based on Fourier transform, it's the real deal,
  Programmed on a minicomputer, ready to reveal.
  
  It can spot both large and subtle waves,
  In an ECG waveform, it behaves.
  Cardiac arrhythmias, it can detect,
  From normal sinus rhythm to fibrillation, you can bet.
  
  Premature atrial contraction, premature ventricular too,
  First, second, and third-degree blocks, it'll go through.
  Atrial and ventricular fibrillation, it ain't no joke,
  Even ventricular tachycardia, it'll smoke.
  
  This algorithm's got rhythm changes on its scope,
  But it ain't limited, it's got a broad scope.
  It can get a unique specification,
  Of any waveform's frequency, no limitation.