Nursing care
Bradycardia nursing care: what to assess and what to do first
Written and reviewed by Dana Whitfield, RN, MSN · 5 min read · Updated September 2026
Short answer
Bradycardia is a heart rate under 60 beats per minute, and the number alone does not tell you what to do. A fit adult can sit at 45 and need nothing. A patient who is dizzy, hypotensive, or losing consciousness at the same rate needs atropine, pacing, and close monitoring. Assess perfusion before you assess the monitor.
The clinical picture
Sinus bradycardia means the SA node is firing slowly but normally, at a rate below 60. Causes range from high vagal tone and physical conditioning to hypothyroidism, hypothermia, raised intracranial pressure, and drugs such as beta blockers, digoxin, and calcium channel blockers. It also shows up as a side effect of sick sinus syndrome or as a complication after an inferior MI, where the right coronary artery supplies the SA node.
The rate is not the problem; the symptoms are. A trained athlete at 48 with warm skin, clear mentation, and a blood pressure of 118/70 needs nothing more than a note in the chart. A postoperative patient at 48 who is diaphoretic, confused, and has a systolic pressure of 82 needs atropine drawn up and pacer pads on the chest before you finish the assessment. Same rate, opposite response, because the second patient's rate cannot support cardiac output.
Assessment: what to look for and in what order
Start with the patient, not the monitor. Airway, breathing, level of consciousness, skin colour and temperature, and a blood pressure. A symptomatic bradycardia presents with syncope, presyncope, confusion, chest pain, dyspnoea, or hypotension. If any of these are present, treat it as unstable regardless of the exact number on the strip.
Once the patient is assessed, look at the rhythm. Confirm the rate, check for a 1:1 P wave to QRS relationship, and rule out a higher-grade block masquerading as simple bradycardia, since second-degree type II and third-degree block need pacing rather than atropine. Check the medication administration record for beta blockers, digoxin, or calcium channel blockers given in the last few hours, and pull a recent potassium and digoxin level if the patient is on either drug. Twelve-lead ECG confirms the rhythm and rules out an evolving inferior MI as the cause.
Immediate interventions
For a symptomatic patient, follow the ACLS bradycardia algorithm: atropine 1 mg IV push, repeated every three to five minutes to a maximum of 3 mg. Have transcutaneous pacer pads on the patient before the first dose if the presentation is severe, since atropine can fail in a transplanted heart or a high-grade block, and pacing should not be delayed while you wait to find out.
If atropine fails or pacing is needed, dopamine or epinephrine infusions are the next line while a transvenous pacer is arranged. Stop or hold any AV-nodal blocking drug the patient is currently receiving and notify the prescriber immediately rather than waiting for the next scheduled dose. For an asymptomatic patient, the correct intervention is often observation: continuous telemetry, trended vital signs, and no drug given for a number that is not causing harm.
Ongoing nursing management
Keep the patient on continuous cardiac monitoring until the cause is identified and the rate has been stable long enough to trust it. Trend blood pressure and mental status alongside the rate, since a rate that was tolerated an hour ago can become symptomatic as other factors change. Reassess after every dose of atropine for effect and for new ectopy, since atropine can provoke tachyarrhythmias in some patients.
Review the medication list daily with pharmacy if the cause is drug-related, and hold doses rather than stopping them outright without a prescriber order. If a permanent pacemaker is placed, monitor the insertion site, confirm capture and sensing on the post-procedure strip, and document the paced rate and underlying rhythm clearly in the chart for the next shift.
Patient and family education
Explain the difference between a low rate that is normal for that person and one that is a warning sign, using language tied to how they feel rather than the number itself: dizziness, near-fainting, or unusual fatigue on exertion are the symptoms to report, not the rate on a home monitor.
If a pacemaker is placed, teach site care, signs of infection, and the need to avoid strong magnetic fields and to carry the device identification card. Reinforce that missed doses of a beta blocker or calcium channel blocker should never be doubled up, and that any new dizziness or fainting after starting one of these drugs warrants a call to the prescriber rather than waiting for the next appointment.
How this appears on the NCLEX
NCLEX bradycardia items are written to test whether you treat the monitor or the patient. Expect a stem giving a rate in the 40s alongside either a completely normal set of vital signs and an asymptomatic description, or a patient who is hypotensive, diaphoretic, and confused. Selecting atropine for the first patient is the wrong answer; selecting observation and reassessment for the second is equally wrong.
Priority questions often ask what to do first, and the answer sequence is usually assess for symptoms, then intervene. Expect distractors that offer a nursing action, such as elevating the head of the bed, before the correct first action of assessing perfusion and level of consciousness. Know the atropine dose and maximum, and know that pacer pads are applied before, not after, atropine fails in an unstable patient.
The next step on this is the same as on everything else here: answer questions and read the rationales. Our cardiovascular practice questions are the closest set to what this page covers.
Common questions
What heart rate is considered bradycardia in an adult?
A resting heart rate below 60 beats per minute is bradycardia by definition. Whether it needs treatment depends entirely on whether the patient is symptomatic, not on how far below 60 the rate sits.
What is the first nursing action for a patient with bradycardia?
Assess the patient for symptoms of poor perfusion: level of consciousness, skin colour and temperature, and blood pressure. Treat the rhythm strip only after you know whether the patient can tolerate the rate.
Why does an athlete have a low heart rate without needing treatment?
Conditioning increases stroke volume, so the heart can maintain adequate cardiac output at a lower rate. Their perfusion is normal, so the low number reflects efficiency rather than a failing conduction system.
What is the maximum dose of atropine for bradycardia?
Atropine is given as 1 mg IV push, repeated every three to five minutes, up to a total of 3 mg. Beyond that dose, full vagal blockade has usually been reached and further doses will not help.
Can bradycardia be a side effect of medication?
Yes. Beta blockers, calcium channel blockers, and digoxin are common causes, and a toxic digoxin level can produce profound bradycardia. Review the medication administration record and recent lab values whenever a new bradycardia appears without another clear cause.
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