1927 Foundation of the DGHKF by Prof. A. Weber and Prof. B. Kisch in Bad Nauheim. The first executive board of the DGHKF consists of A. Weber, Bad Nauheim, H. E. Hering, Köln, J. Rihl, Prag, B. Kisch, Köln, and H. Eppinger, Freiburg. Registered office was William-G. Kerckhoff-Herzforschungsinstitut, Bad Nauheim, under direction of Prof. F. Groedel. 1933 Emigration of F. Groedel to the United States of America. 1933-1941 Prof. E. Koch becomes acting chairman but Groedel remains director and influences fate and finances from his New York domicile and practice. 1938 Emigration of B. Kisch to the United States of America. 1948 Foundation of the "American College of Cardiology" in the United States. (Executive board: Groedel and Kisch). 1948 Prof. H. Schäfer is the new executive secretary of the society (executive board: K. Matthes, Erlangen, F. Hildebrandt, Bad Nauheim/Giessen, C. Oelemann, Bad Nauheim, A. Weber, Bad Nauheim, E. Wollheim, Lund). 1952 Incorporation of the Kerckhoff-Institute into the Max-Planck-Society, Appointment of Prof. R. Thauer to the directorship of the Kerckhoff-Institute and election to the position of the executive secretary until 1976. 1972 Appointment of Prof. W. Schaper to the Kerckhoff-Institute, Bad Nauheim. 1976 Election of Prof. Wolfgang Schaper to the executive board of the society and assumption of the office of the executive secretary until 1989.