An early 20th century office of cardiology (like those of Dr. Iriarte or Aranzadi) is exhibited. The most spectacular piece is an electrocardiograph machine on a wood table made by G. Boulitte in Paris around 1918. The founder of Pro-Cardiacos, Dr. Iriarte, also edited a Cardiophonic Method that was used to train doctors of general medicine and young cardiologists.