What to Do If You Are Unable or Unwilling to Perform Full CPR

If you witness a cardiac arrest and cannot or do not want to give mouth-to-mouth breathing, push hard and fast on the center of the chest. Hands-only CPR, meaning chest compressions without rescue breaths, is the single most valuable thing an untrained or reluctant bystander can do, and research consistently shows it produces survival rates as good as or better than traditional CPR for most adult cardiac arrests. But even if you cannot physically perform compressions at all, you still have a role: calling emergency services immediately, finding an automated external defibrillator, and staying with the person until help arrives each improve the odds of survival.

Why Hands-Only CPR Works So Well for Adults

For the first several minutes after a sudden adult cardiac arrest, the blood still contains enough oxygen to keep the brain and heart alive if someone keeps it moving. That is the core reason chest compressions alone can be effective without rescue breaths. A meta-analysis of bystander-witnessed cardiac arrests found that compression-only CPR was associated with about 11.5% survival to hospital discharge, compared with roughly 9.4% for standard CPR that included mouth-to-mouth ventilation.¹ A large study from Arizona reported an even starker picture: survival was about 13.3% with compression-only bystander CPR, 7.8% with conventional CPR, and just 5.2% when no bystander CPR was attempted at all.²

The numbers can seem counterintuitive. How could skipping breaths outperform giving them? One reason is practical: pausing compressions to deliver breaths interrupts blood flow. Each pause drops the pressure that has been building in the chest, and it takes several compressions to get it back. Untrained rescuers tend to pause too long during ventilation attempts, and the net blood flow to the brain suffers. Another reason is that the simplicity of hands-only CPR makes people more willing to start at all, and starting is what matters most.

That said, a nationwide Japanese study found that conventional CPR with rescue breathing was associated with slightly better one-month survival and neurological outcomes compared to compression-only CPR when bystanders witnessed the arrest.³ The takeaway is not that one approach is universally superior. For someone trained and confident in rescue breathing, giving breaths between compressions is a reasonable choice. But for someone who is untrained, uncomfortable, or simply unable to provide breaths, hands-only CPR is not a lesser alternative. It is a proven lifesaver.

When Compression-Only CPR Falls Short

The “compressions are enough” message applies primarily to adults who collapse suddenly from a cardiac cause, which accounts for the majority of out-of-hospital cardiac arrests. It does not apply equally to every scenario. In children, drowning victims, and people whose hearts stopped because they could not breathe, the oxygen reserves in the blood deplete faster or were already low. Rescue breathing becomes more important in these cases.

A nationwide study of pediatric drowning-related cardiac arrests found that compression-only CPR was linked to roughly 38% higher 30-day mortality compared to CPR that included rescue breathing.⁴ Separate research covering non-cardiac arrests more broadly confirmed that rescue breathing made the biggest difference in children and in drowning cases, while for adults the benefit was less clear.⁵ If you find yourself with a child who has drowned or choked and you are able to give rescue breaths, doing so matters more than for the typical adult cardiac arrest. But if you cannot, compressions alone are still far better than standing by and waiting.

What Holds People Back

Understanding the barriers is useful because it can help you think through your own hesitations before you are in a crisis. The most commonly reported reasons bystanders do not start CPR cluster around a few themes: fear of disease, fear of hurting the person, uncertainty about whether CPR is even appropriate, and the sheer emotional overwhelm of watching someone collapse.

Disease transmission fear is powerful. Surveys have found that about 82% of people are at least moderately concerned about catching an illness through mouth-to-mouth contact. Only 15% said they would “definitely” perform full CPR with rescue breathing on a stranger, compared with 68% who would “definitely” do chest compressions alone.⁶ In reality, the risk of contracting a serious disease from mouth-to-mouth resuscitation is extremely low, but the fear is real enough to stop people from acting.⁷ Hands-only CPR sidesteps this concern entirely.

Fear of causing injury is the other big one, and it persists even when mouth-to-mouth is off the table. A systematic review of psychological and behavioral factors found that bystanders commonly reported feeling unprepared, uncertain about when CPR is appropriate, and afraid of doing harm.⁸ A study of hospital non-clinical staff found that concern about harming the victim was a bigger barrier than fear of infectious disease, even shortly after the COVID-19 pandemic.⁹ This fear, while understandable, is misplaced: a person in cardiac arrest is clinically dead. You cannot make their situation worse by trying. Cracked ribs are a known possibility during good compressions, and they are considered an acceptable trade-off for survival.

The Gender Gap in Bystander CPR

Women who collapse in public are less likely to receive bystander CPR than men, and the reasons reveal how social discomfort compounds medical reluctance. Research into public perceptions identified three main themes behind the disparity: concerns about touching or exposing a woman’s chest during compressions, a perception that women are physically fragile and more prone to injury, and a failure to recognize that women experience cardiac arrest at all.¹⁰

A web-based survey found that many male respondents hesitated to perform CPR on women because of concerns about removing clothing, while female respondents were significantly less likely to view chest exposure during resuscitation as embarrassing or offensive.¹¹ These hesitations are worth confronting now, before you are ever in the situation. You do not need to remove a bra to perform chest compressions. You place the heel of your hand on the center of the chest, between the nipples, and press. If an AED needs to be applied, pads do need to go directly on skin, but that is a matter of seconds and someone’s life is at stake.

Let the 911 Dispatcher Talk You Through It

If you have never taken a CPR class or your training was years ago, the emergency dispatcher can walk you through compressions in real time. This is called dispatcher-assisted CPR, and it makes a measurable difference. Research has shown that when dispatchers instruct callers to perform compression-only CPR rather than conventional CPR, bystanders are significantly more likely to actually do it.¹² The simplified instruction set removes confusion and gets hands on the chest faster.

Dispatcher guidance also improves outcomes. A multicenter study found that dispatcher-assisted CPR was particularly effective for bystanders who had never been trained, roughly doubling the odds of a favorable neurological outcome compared to no bystander CPR at all.¹³ The combination of prior CPR training and dispatcher guidance produced the best results, but even completely untrained bystanders who followed dispatcher instructions did far better than those who did nothing. So even if you feel completely unprepared, call 911, put the phone on speaker, and follow the operator’s voice.

If You Truly Cannot Do Compressions

Some people face physical limitations that make chest compressions impractical. Arthritis, back injuries, small body size relative to the patient, disability, or advanced age can make it difficult to sustain the hard, fast pushing that effective CPR requires. Even fit rescuers experience a significant decline in compression quality within two minutes, with the depth of compressions dropping measurably as fatigue sets in.¹⁴ One study found that almost 80% of rescuers reported fatigue affecting their performance, and that the proportion of adequately deep compressions dropped from about 53% in the first minute to 38% by the fifth minute.¹⁵

If you cannot do compressions yourself, you can still save a life through other actions:

Call 911 immediately: Delays in calling emergency services are independently associated with higher mortality. Getting paramedics dispatched is the single most time-critical step.¹⁶
Find and bring an AED: Automated external defibrillators are increasingly available in public buildings, airports, gyms, and shopping centers. They give voice prompts and are designed for untrained users. The machine analyzes the heart rhythm and will only deliver a shock if one is needed.
Recruit another bystander: If there are other people nearby, direct someone specific to start compressions. Pointing at a person and saying “You, come do chest compressions” is more effective than a general call for help. You can relay the dispatcher’s instructions.
Clear the area for paramedics: Unlock doors, turn on lights, move furniture, and send someone to wave down the ambulance. Shaving even 30 seconds off the time between the ambulance arriving and the paramedics reaching the patient matters.

Recognizing Cardiac Arrest in the First Place

One reason people freeze is that cardiac arrest does not always look the way you expect. A person may gasp, gurgle, or make snoring sounds. This is called agonal breathing, and it is not real breathing. It is a reflex that can persist for minutes after the heart stops. Some people also experience brief seizure-like movements at the onset of cardiac arrest, occurring in roughly 13% of cases in one observational study.¹⁷ Bystanders who see gasping or twitching often assume the person is breathing or having a seizure, not that their heart has stopped.

The simple rule: if someone collapses, is unresponsive when you shout at them and tap their shoulders, and is not breathing normally, assume cardiac arrest and act. Agonal gasps do not count as normal breathing. You do not need to check for a pulse, as even trained professionals sometimes struggle to find one quickly and reliably. If in doubt, start compressions. If you were wrong and the person was not in cardiac arrest, they will react to being pushed on, and you can stop.

How the Pandemic Changed the Conversation

COVID-19 intensified the reluctance many people already felt about mouth-to-mouth contact and pushed it into the territory of chest compressions too. Surveys during the pandemic found that laypeople were significantly less willing to perform even compression-only CPR on strangers and acquaintances, though willingness to help family members held relatively steady.¹⁸ Major resuscitation organizations responded by updating their guidelines to explicitly recommend hands-only CPR for lay rescuers and suggested covering the patient’s nose and mouth with a cloth or face mask during compressions to reduce aerosol exposure.¹⁹ Research supported the feasibility of this approach, finding that the recommendation to perform at least hands-only CPR with a cloth covering was both practical and aligned with bystander willingness.²⁰

These pandemic-era adaptations are worth keeping in mind regardless of the current infectious disease landscape. If you are worried about any respiratory illness, placing a cloth over the patient’s mouth and nose while performing chest compressions is a reasonable precaution that does not meaningfully interfere with the quality of compressions.

You Can Learn Hands-Only CPR in Minutes

One of the most effective things you can do right now, before you ever face a cardiac arrest, is watch a short training video. Research has shown that even ultra-brief video instruction lasting just a few minutes dramatically improves a person’s willingness and ability to perform hands-only CPR. In one study, nearly a quarter of untrained people did not even attempt CPR on a simulation mannequin, compared with less than 1% of those who had watched a short training video beforehand.²¹ Another study conducted in a shopping mall found that people who viewed a brief video called 911 more often, started compressions sooner, compressed at a faster rate, and spent less time with their hands off the chest.²²

The technique itself is straightforward. Place the heel of one hand on the center of the person’s chest. Place your other hand on top and interlace your fingers. Lock your elbows and use your body weight to push straight down at least two inches deep. Push at a rate of 100 to 120 compressions per minute, which is roughly the tempo of the song “Stayin’ Alive.” Do not stop until emergency responders take over or the person starts moving and breathing normally. If someone else is available, take turns every two minutes so fatigue does not erode your compression quality.

What “Cough CPR” Is and Why It Does Not Work

You may have seen social media posts or chain emails claiming that forceful coughing can restart your heart or substitute for CPR. A systematic review of alternative CPR methods, including so-called cough CPR, concluded that these techniques should not be routinely used in established cardiac arrest.²³ Cough CPR is sometimes used in very controlled medical settings, such as during a cardiac catheterization when a patient is conscious, monitored, and develops a specific arrhythmia. Outside that narrow context, it is not a real intervention. A person in cardiac arrest is unconscious and cannot cough. Sharing or relying on this myth wastes time and gives people a false sense of preparedness.

Legal Protections for Bystanders

A common worry is getting sued for helping. In the United States, all 50 states have some form of Good Samaritan law that provides legal protection to people who offer emergency assistance in good faith. Researchers examining the legal landscape have recommended that CPR training courses explicitly reiterate these protections, since awareness of them increases willingness to help.²⁴ The specifics vary by state and country, but the general principle is consistent: if you are acting voluntarily, without expecting payment, and without gross negligence, you are protected. Broken ribs from compressions, bruises, or other injuries that result from a good-faith resuscitation attempt are not grounds for liability.

The Emotional Aftermath of Responding

Even if you know what to do, the experience of performing CPR on a real person is intense. It is worth being honest about this, because some of the reluctance people feel is not about technique or disease risk but about the psychological weight of the situation. A study that conducted structured telephone interviews with bystanders found that roughly one in three showed signs of pathological psychological processing weeks after witnessing a cardiac arrest, including flashbacks, heightened anxiety, and feelings of guilt.²⁵

At the same time, many bystanders process the event well. A study of citizen responders who had participated in resuscitation found that average post-traumatic stress scores were low.²⁶ Qualitative research found that when the patient survived, responders tended to feel empowered and more confident about helping in the future. When the patient died, responders often experienced self-doubt, wondering whether they acted fast enough or did something wrong.²⁷ Knowing in advance that these reactions are normal, and that cardiac arrest has a high mortality rate regardless of bystander action, can help take some of the emotional weight off. If you do perform CPR on someone and find yourself struggling afterward, talking to a mental health professional or even calling a crisis line is a reasonable step that more people should feel comfortable taking.

Drone-Delivered Defibrillators and the Near Future

For situations where no AED is nearby and emergency services are minutes away, emerging technology may soon fill the gap. Simulation studies have tested drones that fly automated defibrillators directly to the scene of a cardiac arrest. In one set of trials, the median time from the emergency call to drone takeoff was about two and a half minutes, and bystanders were generally able to retrieve the AED safely from the drone once it arrived. However, many bystanders struggled with actually using the AED correctly, and the hands-off time while applying it averaged over two minutes.²⁸ The technology is promising but still being refined, and it underscores that the human element, the willingness and ability to act, remains the bottleneck. A defibrillator that lands at your feet only helps if someone applies it.