When performing CPR, how long should each cycle be before reassessing?

During CPR, it is recommended to perform each cycle of compressions and ventilations for 2 minutes before reassessing the patient's condition. This duration aligns with guidelines that emphasize the importance of providing a consistent and effective rhythm of compressions to maximize blood flow to vital organs. After 2 minutes of uninterrupted CPR, it is crucial to pause briefly to check for responsiveness and pulse, allowing for a quick assessment of the patient's situation. This approach strikes a balance between delivering adequate care and ensuring timely reassessment for any changes in the patient's status. The effectiveness of CPR generally diminishes if cycles are too short or if there are prolonged pauses, hence the rationale behind the 2-minute interval.