A deteriorating patient rarely announces that they are about to arrest. There may be increasing oxygen requirements, a changing conscious state, worsening work of breathing, hypotension, chest pain or a rhythm that does not look right. For nurses, paramedics and other frontline clinicians, adult resuscitation is not simply what happens once a patient becomes unresponsive. It begins with recognising deterioration, escalating early and being ready to act decisively when seconds matter.
High-quality resuscitation is a team skill, but every team member must be able to perform the fundamentals reliably. That means knowing the current approach, practising technical skills until they are automatic, and communicating clearly under pressure. It also means understanding that the best outcome is often achieved before the resuscitation trolley reaches the bedside.
Adult resuscitation begins before the arrest
Early recognition is one of the strongest opportunities to change a patient’s trajectory. Clinical deterioration can be subtle, particularly in patients with complex comorbidities, sedation, sepsis, respiratory disease or altered baseline observations. A single abnormal vital sign may not tell the whole story, but an adverse trend should prompt closer assessment and escalation.
For ward-based clinicians, this means using local observation and escalation systems as intended, while applying clinical judgement. A patient whose respiratory rate rises steadily, who appears exhausted or who is becoming newly confused requires attention even if every trigger threshold has not yet been met. For paramedics, it means reassessing frequently, considering the likely cause of deterioration and pre-alerting the receiving team when a patient is at high risk.
A structured A-E assessment remains practical because it keeps the immediate priorities in view. Address airway compromise, assess breathing and oxygenation, evaluate circulation and perfusion, check neurological status, and expose the patient appropriately while maintaining dignity and temperature control. Treating reversible problems early, such as hypoxia, hypoglycaemia, hypotension or severe bronchospasm, may prevent cardiac arrest altogether.
The first minutes: calm, clear, high-quality action
When a patient is unresponsive and not breathing normally, the response needs to be prompt and organised. Call for help, activate the relevant emergency response, begin CPR and bring the defibrillator or monitor to the patient without delay. Agonal gasps are not normal breathing and should not delay action.
Effective chest compressions are central to adult resuscitation. The aim is to provide consistent compressions with adequate depth and rate, full chest recoil and minimal interruptions. In real clinical environments, this depends on more than knowing the numbers. Bed height, patient position, rescuer fatigue, mattress compression and crowded rooms can all reduce compression quality.
Teams should use practical strategies to protect performance. Place the patient on a firm surface where possible, use a backboard according to local practice, change the compressor before fatigue compromises quality and make role changes efficient. The team leader should watch for unnecessary pauses during rhythm checks, ventilation, airway procedures and drug administration. A technically advanced intervention is not worthwhile if it creates long interruptions in compressions.
Ventilation also requires discipline. Excessive ventilation can increase intrathoracic pressure and reduce venous return, compromising circulation during CPR. Use the appropriate airway technique and ventilation approach for the clinician’s scope, training and available equipment. Basic airway manoeuvres, suction and a well-fitted bag-valve-mask can be highly effective when performed well. An advanced airway may be appropriate, but it should not distract the team from oxygenation, ventilation and continuous quality CPR.
Defibrillation: speed matters, but preparation matters too
Early defibrillation is critical for shockable rhythms. The defibrillator should be attached as soon as practical, and the team should work to minimise the time from rhythm recognition to shock delivery. In a coordinated team, pads can be applied while compressions continue, with roles allocated before the rhythm check occurs.
Safety remains non-negotiable. During analysis and shock delivery, the team leader needs to ensure nobody is touching the patient, bed or connected equipment that could create risk. Clear, closed-loop language helps: identify the rhythm, state the plan, confirm charging, confirm clearance and deliver the shock. CPR should resume immediately afterwards unless there is a specific reason to pause.
It is easy to focus on the defibrillator as the defining piece of resuscitation equipment. In practice, it is only one part of a reliable system. Pads need to be positioned correctly, batteries and consumables need checking, and staff need enough familiarity with their local device to use it without hesitation. Training with the same equipment used in your workplace has a real advantage.
Treat the rhythm, then find the cause
Resuscitation algorithms provide an essential framework, but patients do not arrest because of an algorithm. The team must actively look for reversible causes throughout the event. Hypoxia, hypovolaemia, hypo- or hyperkalaemia and other metabolic disturbances, hypothermia, tension pneumothorax, cardiac tamponade, toxins, and thrombosis are all possibilities that need consideration in the right context.
The likely cause will depend on the setting. A patient who arrests after progressive respiratory distress may require a different line of thinking from a dialysis patient with suspected hyperkalaemia, a trauma patient with haemorrhage or a person with sudden collapse and chest pain. Good teams share relevant information aloud so that the leader can form a working clinical picture rather than treating the arrest as a sequence of isolated tasks.
Medication and advanced interventions should be delivered in accordance with current guidelines, local policy and clinician scope of practice. Drug preparation, dose confirmation and documentation need designated roles. This reduces duplication and protects the team from avoidable errors when workload and stress are high.
Leadership is a clinical intervention
A capable team leader does not need to perform every task. Their job is to maintain situational awareness, set priorities, allocate roles, anticipate the next step and keep communication focused. In smaller teams, roles may overlap. In a well-staffed resuscitation response, clarity still matters because too many people doing the same thing can be as unhelpful as too few.
Closed-loop communication is particularly useful. Rather than saying, “Can someone get IV access?”, the leader assigns the task to a named person. The clinician repeats the instruction, performs the task and reports completion. This simple practice makes gaps visible and reduces the chance that an instruction is assumed to have been completed.
The recorder is also a key member of the team. Accurate timing of collapse, CPR, rhythm changes, shocks, medications, return of spontaneous circulation and key clinical events supports decision-making during the arrest and handover afterwards. Documentation should not become more important than patient care, but it should be planned rather than treated as an afterthought.
After return of spontaneous circulation
Return of spontaneous circulation is not the end of the emergency. These patients remain critically unwell and can deteriorate again without close monitoring and active management. Priorities include airway and ventilation, oxygenation targets, haemodynamic support, temperature management as guided by local protocols, glucose assessment, ECG acquisition and identification of the cause of arrest.
Post-arrest care also demands a high-quality handover. Communicate the patient’s pre-arrest condition, likely cause, downtime where known, rhythms identified, shocks delivered, medications given, airway interventions and response to treatment. In hospital, early involvement of the appropriate critical care, medical or specialty teams is essential. In pre-hospital care, the receiving service needs enough information to prepare for a complex arrival.
Families and colleagues require support as well. Resuscitation events can be confronting, particularly after an unexpected death or a prolonged arrest. A respectful approach to family communication and an appropriate team debrief can help identify learning opportunities while recognising the emotional impact on staff.
Why practice must be realistic
Competence fades when skills are not used. Reading an algorithm is useful, but it does not replicate the physical demands of compressions, the noise of an emergency call, the challenge of bag-valve-mask ventilation or the need to communicate while multiple interventions occur at once.
Scenario-based education gives clinicians a safe place to make decisions, practise technical skills and receive specific feedback. The most valuable sessions reflect the clinical setting. A ward team may need to rehearse recognising deterioration and managing the first minutes before the arrest team arrives. An emergency or critical care team may focus on role allocation, advanced airway management, rhythm recognition and post-arrest priorities. Paramedic teams may benefit from scenarios that account for confined spaces, limited personnel and transport decisions.
ECT4Health supports practical, clinician-led education that helps teams translate guidelines into confident action at the bedside, in the resus bay or on scene. Training should leave participants clearer about what they need to do, when they need to escalate and how they contribute to a coordinated response.
The next cardiac arrest will not arrive at a convenient time or with a perfect team mix. Regular, realistic practice gives clinicians something better than confidence alone: the ability to recognise the problem early, perform the essentials well and work together when the patient has no time to spare.