Cardiopulmonary Resuscitation (CPR) Practice 2025 - Free CPR Practice Questions and Study Tips.

The cardiac pump theory emphasizes that effective chest compressions should be delivered directly over the heart. This approach is based on the understanding that when compressions are applied in this manner, they increase intrathoracic pressure, thereby squeezing the heart and facilitating blood flow during the compression phase of CPR. By directly compressing the heart, rather than just the chest wall, blood is effectively pushed out of the heart and into the circulation, which is crucial for maintaining vital organ perfusion during cardiac arrest.

This method highlights the importance of achieving adequate depth and force in compressions, which are necessary to effectively generate the pressure required to circulate blood. The cardiac pump theory contrasts with other models, such as the thoracic pump theory, which suggests that compressions create negative pressure in the thoracic cavity and draw blood into the heart. This focus on directly impacting the heart itself is what distinguishes the cardiac pump theory as a vital principle in CPR practices.