Method to Increase The Efficacy of Cardiopulmonary Resuscitation By Means of Alternating Phases During Which The Physical Characteristics of Chest Compression Are Varied So As to Increase Overall Forward Blood Flow

1) A method to increase the overall hemodynamic efficacy of external chest compressions performed during cardiopulmonary resuscitation on a patient comprising:

• applying two or more chest compression-decompression cycles (CCDC's) to the patient, wherein applying the two or more CCDC's to the patient includes applying a first set of CCDC's optimized for cardiac output and applying a second set of CCDC's optimized for venous return;
• and
• wherein the first set of CCDC's optimized for cardiac output is performed alternately with the second set of CCDC's optimized for venous return to enhance hemodynamic efficacy.