[Comparative review of various resuscitation procedures].
During the last 10 years many experiments have confirmed the theory that blood flow during CPR likely occurs as a result of manipulation of intrathoracic pressure. In order to improve vital organ perfusion by increasing intrathoracic pressure many different techniques of CPR have been developed. These include "new CPR" (simultaneous ventilation and compression), asynchronous ventilation, prolonged compression, and continuous or interposed abdominal compression. Other methods like open chest CPR and the use of mechanized CPR or even cardiopulmonary bypass have also recently been proposed. All these techniques are reviewed in detail.