Final answer:
The statement is true; successful defibrillation is more likely if the time between the last chest compression and the defibrillator shock is minimized.
Step-by-step explanation:
The statement, True or False: Shortening the interval between the last compression and the shock by even a few seconds can improve shock success, is indeed true. During cardiopulmonary resuscitation (CPR), the period right before a defibrillator delivers a shock is critical. The success of a shock is higher if it is administered as soon as possible after the last chest compression.
This concept is rooted in the goal of CPR, which is to maintain blood flow to the brain and heart, delivering oxygen and nutrients to these vital organs. When a defibrillator is used, it attempts to reset the heart's rhythm back to normal by applying an electrical shock. If this shock is delivered immediately after chest compressions, the chances that the heart will resume its normal rhythm increase because blood and oxygen have just been circulated thanks to the compressions. In contrast, if there's a long pause between CPR and defibrillation, the blood flow decreases, and the tissues may not respond as well to the electrical shock.
Studies have shown improvements in shock success when the hands-off interval—that is, the time when no chest compressions are performed—is minimized. Healthcare professionals are trained to ensure that defibrillators are charged and ready to deliver a shock as soon as compressions are paused, to minimize the time the heart is without blood flow. This can be especially true in a hospital setting, where advanced life support measures are available, and defibrillation can be seamlessly integrated into the resuscitation process.
In summary, the timing of defibrillation relative to chest compressions is a significant factor in the outcome of a resuscitation attempt, and efforts should be made to reduce any delay between these elements of CPR.