To get a quantitative statement concerning the significance of modern therapy in supraventricular tachyarrhythmias 200 consecutive patients who were admitted to a coronary unit were analysed retrospectively. Finally accepted treatment were empirical drug therapy in 85 per cent, electrophysiologically controlled medical treatment in 12.5 per cent, pacemaker therapy in 1 per cent, and ablative procedures (catheter ablation and surgical Kent bundle dissection) in 2.5 per cent. As strictly atrial tachyarrhythmias are prevailing and advantages of electrophysiologically controlled drug therapy are not proven, in the majority of cases of supraventricular tachyarrhythmias empirical medical treatment is sufficient. Only in very few cases it is surpassed by the modern procedures. But, nevertheless these modern methods should be known to find the best treatment in problematical cases.