5 Nursing Responses to Abnormal ECG Findings

Assess the patient before the monitor

An ECG finding is a signal to assess the patient, not a substitute for assessing them. Prioritize the patient over the monitor: a displayed rhythm does not by itself prove effective circulation.

When an alarm or unexpected tracing occurs:

1. Go to the patient and assess responsiveness, airway, breathing, circulation, and symptoms. Check a pulse when the rhythm or patient’s condition warrants it.

2. Check vital signs and perfusion. Note blood pressure, oxygen saturation, mental status, skin signs, chest discomfort, dyspnea, dizziness, syncope, and signs of shock or acute heart failure.

3. Validate the tracing by checking electrodes, cables, lead placement, and signal quality. Compare the waveform with the patient’s pulse and, when appropriate, obtain a 12-lead ECG. Do not dismiss a concerning alarm as artifact without checking the patient.

4. Escalate promptly for instability, a new or sustained dangerous rhythm, suspected ischemia, or a rhythm change accompanied by symptoms. Use the rapid-response or emergency system according to local policy.

5. Continue reassessment and document the finding, the patient’s condition, actions, notifications, response, and follow-up plan.

Judge urgency by clinical condition

Urgency depends on the rhythm and the patient’s clinical condition together. For bradycardia, warning signs include hypotension, altered mental status, shock, ischemic discomfort, or acute heart failure. Assess for these same signs with tachyarrhythmia; an unstable tachyarrhythmia may require urgent synchronized cardioversion by the response team.

A heart-rate number alone does not determine urgency. Follow current facility protocols and scope of practice. Do not independently choose medication or other treatment outside orders and your scope.

Apply the response to common situations

These situations illustrate how assessment, signal validation, and escalation change with the patient’s condition.

Monitor alarm with a patient who feels well

A telemetry alarm reports a heart rate of 190 beats per minute. The patient is awake, speaking comfortably, and denies symptoms, but the tracing is noisy and the left-chest electrode is partly detached. Go to the patient rather than silencing the alarm remotely. Assess symptoms, pulse, vital signs, and perfusion; correct the electrode or lead problem; then reassess the tracing and compare the displayed rate with the palpable pulse. If the abnormal rate persists, the rhythm is unclear, or symptoms develop, escalate and obtain further ECG assessment according to protocol. Document the alarm, assessment, signal correction, findings, and whether the abnormality persisted. Poor signal can create artifact, but the patient still needs direct assessment; telemetry does not replace assessment of vital signs, neurologic status, or breathing.

New irregular rhythm with a rapid rate

The monitor shows a new irregular narrow-complex rhythm at approximately 150 beats per minute. The patient reports palpitations and mild lightheadedness, and blood pressure is lower than the prior reading, although the patient is alert. Assess airway, breathing, pulse, blood pressure, oxygenation, mental status, chest discomfort, and signs of poor perfusion. Stay with the patient, notify the responsible clinician promptly, and escalate to the rapid-response team if instability develops or local criteria are met. Continue monitoring, obtain a 12-lead ECG if directed or permitted by protocol, and prepare for further evaluation. Do not independently select rate-control medication or other treatment outside orders and scope. Reassess after each intervention and document the rhythm, symptoms, vital-sign trend, notifications, orders, actions, and response. The patient’s condition—not the heart-rate number alone—determines urgency.

Slow rhythm with signs of poor perfusion

The patient’s heart rate falls to 38 beats per minute; the patient becomes confused and pale, and blood pressure is 78 over 46 mm Hg. Treat this as an emergency. Assess responsiveness, airway, breathing, pulse, and circulation; call for immediate assistance and activate the rapid-response or emergency response according to policy. Maintain monitoring, support airway and breathing, and provide oxygen if indicated by the patient’s condition and protocol. Prepare for interventions by the qualified response team, including pacing or medications if ordered and appropriate. Reassess continuously and document the timeline, findings, escalation, interventions, and response. Bradycardia with hypotension and altered mental status indicates cardiopulmonary compromise; the response includes assessment and support, evaluation of reversible causes, and escalation through the bradycardia pathway.

Wide-complex tachycardia with no pulse

The monitor displays a rapid wide-complex rhythm, and the patient is unresponsive with no definite pulse. Activate the code response immediately. Begin high-quality CPR, apply the defibrillator or AED, and follow the adult cardiac-arrest algorithm and team direction. Do not delay CPR or defibrillation to obtain a 12-lead ECG. Continue reassessment and follow the team’s rhythm checks and instructions. Document when the patient was found, pulse and responsiveness, CPR and defibrillation events, team notifications, and outcome. A monitor rhythm must be paired with a pulse and patient assessment; pulseless ventricular tachycardia is a shockable cardiac-arrest rhythm, so immediate resuscitation actions take priority.

New ST-segment change with chest discomfort

The patient reports new pressure-like chest discomfort and nausea, and the monitor appears to show a new ST-segment change. Assess symptoms and vital signs immediately, stay with the patient, and notify the responsible clinician or activate the emergency pathway according to policy. Obtain a 12-lead ECG promptly if available and within protocol; do not rely on a single telemetry lead to establish or exclude ischemia. Continue monitoring and prepare for ordered evaluation and treatment. Document symptom onset, ECG observations, vital signs, ECG acquisition, notifications, and response. New symptoms with a concerning ECG change require prompt clinical evaluation, and a 12-lead ECG provides a broader assessment than a limited telemetry display.

Persistent abnormality without symptoms

A patient with a previously regular rhythm now has frequent premature ventricular beats. The patient denies symptoms, has a palpable pulse and stable vital signs, but the pattern continues on repeat assessment. Assess symptoms, pulse, vital signs, perfusion, and ECG signal, and verify that the finding is not artifact. Review relevant context available to you, such as recent symptoms or medication changes, and report the persistent new finding to the responsible clinician according to policy. Continue monitoring and escalate immediately if the rhythm worsens or symptoms, hypotension, chest discomfort, dyspnea, or altered mental status occur. Document the pattern, assessment, communication, and plan. A stable patient may not need an emergency response, but a persistent new rhythm change still requires communication, surveillance, and a clear escalation plan.

Escalate and hand off clearly

Use a structured handoff such as SBAR. State the situation and rhythm concern; give relevant background and baseline; report your assessment and vital-sign trend; and make a clear request, including how urgently a response is needed. Confirm critical instructions using read-back when appropriate.

Document findings and follow-up

Record the following, as applicable:

• The time the alarm or change was identified and the rhythm or monitor finding observed.

• The patient’s symptoms, responsiveness, pulse, vital signs, oxygenation, and perfusion findings.

• Whether signal quality, leads, or electrodes were checked and whether the finding persisted.

• ECGs obtained and their timing, according to policy.

• Notifications, escalation pathway, instructions received, and read-back when relevant.

• Interventions performed, the patient’s response, reassessment findings, and follow-up plan.

Use objective, time-stamped language. Distinguish what you observed from what was reported, and document actions and communication promptly according to organizational policy. Reassess after each action and record the patient’s response.

• Clinical compromise