While performing high-quality CPR on an adult, you should ensure the following key actions are being accomplished:

• Maintain a chest compression rate of 100 to 120 compressions per minute.
• Compress the chest to a depth of at least 2 inches (5 cm) but no more than 2.4 inches.
• Allow the chest to fully recoil between compressions without leaning on the chest.
• Minimize interruptions in chest compressions, maintaining a chest compression fraction (the percentage of time compressions are performed during CPR) greater than 80%.
• Avoid excessive ventilation (rescue breaths) that can reduce effectiveness.
• Perform compressions with proper hand placement—heel of one hand on the center of the chest, the other hand on top with fingers interlaced.
• If performing rescue breaths, give 2 breaths after every 30 compressions, ensuring each breath makes the chest rise.
• Continue CPR until the victim shows signs of life or professional medical help arrives.

These elements together maximize blood flow and oxygenation to vital organs and improve the chances of survival and recovery in cardiac arrest victims.