The most important cardiological diseases are presented and the indications for the various invasive procedures are defined more precisely. The technique of these interventions is described in detail in the form of instructions for action, the findings are presented and decision criteria for the resulting therapeutic consequences are listed. Possible complications of all the invasive procedures presented are described and advice is given on how to avoid them. The catheter methods described include the simple central venous catheter, left heart catheterization, PTCA, balloon valvuloplasty and catheter ablation. The book benefits from the numerous practical experiences of the authors, which have been incorporated into the presentation. Through the combination of "textbook information" and the presentation of concrete practical applications, the.