This volume contains the revised texts of the presentations at the 29th International Congress of the European Society of Cardiovascular Surgery, held from July 2-5, 1980, in Dusseldorf under the presidency of Jan Nielobowicz (Warsaw). We express our gratitude to all the authors who have been partici- pating in the Congress, in particular to the invited speakers A. R. Castaneda (Boston), D. B. Effler (Syracuse), F. Fontan (Bordeaux), F. Robicsek (Charlotte), and D. N. Ross (London) for their cooperation. We are grateful to our colleagues of the Surgical Department B at the University of Dusseldorf, J. A. Herzer, G. Irlich, R. Karfer, and A. Krian, for their help during preparation and organisation of the Congress. Finally, we are indebted to Sanol Schwarz GmbH for its support of this publication. Dusseldorf, June 1981 Wolfgang Bircks Jarg Ostermeyer Hagen D. Schulte Contents The Contribution of European Surgeons to the Development of Modern Vascular Surgery. J. Nielubowicz. With 20 Figures *. ****** Session I Cardiac Surgery Valvular Surgery I Chairman: V. O. Bjork, Stockholm; Co-Chairman: A. Carpentier, Paris Special Morphological Structures Along the Closing Zone of the Mitral Valve. H. Heine and M. Laatz. With :5 Figures **. **. . *. *. . ** 25 Conservative Surgery of the Mitral Valve. Annuloplasty on a New Adjustable Ring. M. Puig Massana, J. M. Calbet, and E. Castells With :5 Figures ********. **. *****. **. ****. *****************...*.

The first cardiovascular operation in Duesseldorf, a ligation of an open ductus arteriosus (Botallo), was performed in 1938 by E. K. Frey. During the Second World War and the subsequent years many difficulties hindered cardiovascular surgery in Duesseldorf. However, it was resumed on 3 May 1949 by Prof. Ernst Derra, again by ligating an open ductus arteriosus. This was the starting pOint of the successful cooperation between the cardiological and surgical working groups - the "birthday" of the Duesseldorf Heart Centre. Further highlights in cardiac surgery were the introduction of open heart surgery by means of surface-cool- ing hypothermia (9 February 1955) and extracorporeal circulation (21 February 1959) . In addition to cardiac catheterization and surgery in patients with acquired and congenital heart disease, the diagnosis and treatment of arrhythmias was one of the focal points of the centre. On 3 October 1961 the first pacemaker was implanted in a patient with a third-degree AV-block after he had been treated using an external device for about 1 year. In recent years interest has increasingly turned to the tachy- arrhythmias. Close cooperation between the medical and surgical teams made possible the application of new pacing techniques for the treat- ment of tachycardia. In patients with intractable arrhythmias, surgical interventions were made to eliminate the "focus" of the arrhythmia. In the past 2 years intraoperative electrophysiologic studies (endo-cardi- al and epicardial mapping) were applied to enhance the success of the surgical procedures.

Dass die wirkliche Mortalitat an Lungenkrebs aber noch eine erheblich hoehere ist, als wir wissen, daran ist wohl kaum zu zweifeln. Zeigen doch alle groesseren Sektionsstatistiken, wie haufig bei den boesartigen Geschwulsten der Lunge die Diagnose verfehlt wird. W. Tabelle 1. Sterbefallraten fiir Krebs und andere maligne Tumoren und fur Krebs der Atmungsorgane in 14 ausgewahlten Landern (bezogen a tj 100000 Lebende). [Nach H. L. DuNN, J. Int. College of Sur- geons 23, (326 1955)} Krebs Krebs und andere maligne Tumoren der Atmungsorgane Land und Jahr ins i- mannlich weiblich mannlich weiblich gesamt gesamt England und Wales 147,8 8,4 12,9 4,3 1930-1932 145,5 143,0 1951 196,8 212,7 182,1 33,5 58,3 10,7 Schottland 10,6 1930-1932 146,9 141,4 157,1 8,0 5,6 50,9 1951 193,1 184,9 30,5 11,9 202,0 Finnland 107,0 13,6 1936-1938 107,6 108,3 7,8 2,3 132,8 21,5 38,0 1951 142,7 11\3,6 6,5 Schweiz 1929-1931 139,7 6,8 12,0 146,9 155,6 2,0 1951 180,1,19,3:33,8 192,1 204,7 5,5 Niederlande 1929-1931 125,7 4,7 7,2 2,2 121,7 117,7 29,7 1951 146,3 17,3 5,1 148,4 150,6 N euseeland 100,5 7,1 1930-1932 4,9 2,5 101,9 103,3 150: 3 1951 160,7 15,6 25,3 5,8 155,5 u SA 108,8 4: 3 1929-1931 3,1 1,9 97,4 86,3 136,1 14,7 24,4 1951 145,1 5,2 140,5 D anemark 1934-1936 161.