What is the appropriate step to take after giving 30 chest compressions?

After performing 30 chest compressions during CPR, the appropriate step is to give 2 rescue breaths. This step is critical in the cycle of CPR because it helps provide oxygen to the lungs and, subsequently, to the heart and brain. The sequence of 30 compressions followed by 2 breaths follows the recognized rhythm of CPR for adult victims, with the goal of maintaining blood circulation and supplying oxygen to vital organs.

The rationale behind this sequence lies in the importance of continuous circulation and oxygenation. While compressions help to maintain blood flow, rescue breaths are essential to ensure that the oxygen exchange occurs, allowing the blood to gain the oxygen it needs to nourish the body's tissues and organs. This combination is pivotal for improving the chances of survival and recovery for the victim.

The other options do not align with the flow of CPR post-compressions. Calling for help is important, but it should typically be done before starting compressions if you are the only rescuer or after the initial CPR cycle is well underway. Checking for responsiveness is usually done before starting CPR to assess if the person is conscious or needs assistance. Changing the position of the patient may be necessary in certain scenarios but is not the immediate next step during CPR after compressions. Thus,