What is one of the consequences of positive pressure created by rescue breaths?

The consequence of positive pressure generated by rescue breaths leading to reduced venous return is an important physiological concept in resuscitation. When rescue breaths are administered, air is forced into the lungs, which can create intrathoracic pressure that is higher than normal. This increased pressure can compress the great veins returning blood from the body to the heart, thereby diminishing the amount of blood that flows back to the heart (venous return).

Reduced venous return can negatively impact cardiac output, as less blood returning to the heart means there is less blood available to be pumped to the body. In a resuscitation scenario, this can be critical, as it may hinder the effectiveness of chest compressions and overall circulation. Therefore, understanding this relationship highlights the importance of careful technique during rescue breaths to minimize negative impacts on circulation during resuscitation efforts.