After 4 minutes of rescue breathing, you should be performing your second pulse check. Current guidelines call for reassessing the victim’s pulse every 2 minutes during rescue breathing, spending no more than 10 seconds each time. What you find during that check determines your next step: continue rescue breathing, switch to full CPR, or manage the person’s recovery if they start breathing on their own.
The 2-Minute Pulse Check Cycle
When someone has a pulse but isn’t breathing adequately, rescue breathing is the correct response: one breath every 6 seconds, or about 10 breaths per minute. But a pulse can disappear at any point, so you need to keep verifying it’s still there. The American Heart Association recommends checking the pulse approximately every 2 minutes throughout rescue breathing.
At the 4-minute mark, you’ve already completed one check at 2 minutes and you’re due for another. Feel for a pulse at the carotid artery (side of the neck) for no longer than 10 seconds. You’re looking for a definitive yes or no. If you’re unsure whether you feel a pulse after 10 seconds, treat it as absent and begin chest compressions immediately.
If the Pulse Is Gone: Start CPR
If you check at 4 minutes and find no pulse, stop rescue breathing and begin full CPR right away. That means 30 chest compressions followed by 2 breaths, repeating in cycles. Push hard and fast, aiming for a depth of about 2 inches at a rate of 100 to 120 compressions per minute. If an AED is available nearby, have someone retrieve it while you start compressions. Every second without blood flow matters, so don’t delay compressions to go searching for equipment yourself.
If another person is available to help, switch who performs compressions every 1 to 2 minutes. Fatigue sets in quickly and compression quality drops significantly even when the rescuer doesn’t feel tired yet. Research suggests rotating every minute produces better compressions than waiting the full two.
If the Pulse Is Present: Keep Going
A pulse at the 4-minute check means rescue breathing is still the right intervention. Continue at the same rate of one breath every 6 seconds, making sure each breath produces visible chest rise. If the chest isn’t rising, reposition the head by tilting it back and lifting the chin before delivering the next breath.
Keep cycling through this pattern: breathe for 2 minutes, check the pulse for up to 10 seconds, then resume. This continues until the person starts breathing on their own, emergency medical services arrive, or the pulse disappears and you transition to CPR.
If You Suspect an Opioid Overdose
Opioid overdose is one of the most common reasons an adult stops breathing while still maintaining a pulse. If you haven’t already administered naloxone (commonly known by the brand name Narcan) and it’s available, give a dose while continuing rescue breathing. If the person hasn’t responded within 2 to 3 minutes after the first dose, administer a second dose. Continue providing rescue breaths while waiting for the naloxone to take effect. It’s not a replacement for breathing support; it’s an addition to it.
Signs the Person Is Recovering
During or between your 2-minute check cycles, watch for signs that the person is beginning to breathe independently. These include visible chest movement that isn’t caused by your breaths, coughing or gagging, purposeful movement of the limbs, or improved skin color (from bluish or pale to more normal tones). These signs need to last more than a few seconds to be meaningful. A single gasp or twitch doesn’t necessarily mean the person has recovered.
If the person begins breathing on their own but remains unconscious, place them in the recovery position. This keeps their airway open and lets any fluids drain from the nose and throat rather than being inhaled. To do it: kneel beside the person, place the arm nearest to you straight out from their body, position the far hand against the near cheek, bend the far knee, and gently roll them toward you using that knee. Tilt the head slightly to keep the airway open. Don’t use this position if you suspect a spinal or neck injury.
What to Tell Paramedics When They Arrive
When EMS takes over, the information you provide helps them make faster decisions. Be ready to report the approximate time you found the person unresponsive, how long you’ve been providing rescue breathing, what you found at each pulse check (whether the pulse was strong, weak, or absent at any point), and whether the person showed any signs of recovery along the way. If you administered naloxone, tell them how many doses and roughly when you gave them. If the person lost their pulse at any point and you performed CPR, note how long compressions lasted before a pulse returned.
Stay with the person and continue rescue breathing until paramedics physically take over. Even if you hear sirens, don’t stop. A gap of even 30 seconds without breathing support can cause oxygen levels to drop dangerously.