History
Dear Ivo van der Bilt
According this paper Naming of the waves in the ECG, with a brief account of their genesis, first use of PQRST was made by Einthoven for mathematically corrected curve of capillary electrometer. Can you kindly provide paper of Du Bois-Reymond?
Best regards DS 09:34, 27 November 2007 (MET)