Cardiac
Cardiac Monitoring & Rhythm Recognition
Introduction to 3-lead monitoring and dysrhythmia awareness using NIH cardiovascular education resources.
Electrical activity and perfusion
The heart’s electrical system coordinates contraction and forward flow.1 AEMTs attach monitor leads to detect rate, rhythm, and signs of ischemia—not to replace 12-lead acquisition performed by paramedics when indicated.
Heart disease remains a leading U.S. health concern;2 many EMS calls involve chest discomfort, syncope, or palpitations where monitoring guides urgency and destination.
Lead placement and artifact
Correct lead placement improves trace quality. Dry skin, secure electrodes, and patient stillness reduce motion artifact. Compare the monitor to the patient: a slow rhythm with a strong pulse may differ from pulseless electrical activity.
Treat unstable patients per protocol—synchronized cardioversion and advanced interventions may require paramedic backup.
Documentation and trend monitoring
Capture rhythm strips for symptomatic events, before and after interventions, and during transport changes. Note pain scores, blood pressure, and exam findings alongside the rhythm.
Trending helps receiving teams see evolution—not a single snapshot in time.
