Vital Signs Across the Life Span

Scope of Practice and Heart Rate Assessment

In healthcare settings, the EKG technician plays an essential frontline role in patient safety and clinical workflow. The technician is responsible for proper patient preparation, accurate electrode placement, and recording quality tracings. Maintaining diagnostic readability requires the technician to actively identify tracing artifacts and implement corrective actions. While an EKG technician may recognize and immediately report life-threatening rhythms to clinical staff, the technician does not diagnose cardiac conditions or provide a formal EKG interpretation. Formal diagnostic interpretation of an EKG belongs entirely to a qualified licensed provider.

Evaluating a patient's pulse provides foundational clinical data before and during cardiac testing. For a conscious adult, the radial artery serves as the most common site for evaluating a resting pulse. For an adult, auscultate the apical pulse at the fifth intercostal space near the left midclavicular line; in infants and young children, the apical site is generally at the fourth intercostal space. The apical site is also the preferred location for assessing heart rate in infants and children younger than 2 years. If an adult patient displays a regular pulse, the technician counts the beats for 30 seconds and multiplies by 2. However, an irregular pulse must be counted for a full 60 seconds to ensure an accurate measurement.

Pulse characteristics and rates vary substantially across different stages of life. The normal resting heart rate for a healthy adult ranges between 60 and 100 beats per minute. An adult resting rate that falls below 60 beats per minute is defined as bradycardia, while a rate rising above 100 beats per minute is defined as tachycardia. In comparison, a resting heart rate for a newborn typically ranges between 100 and 160 beats per minute. In young children aged 1 to 3 years, the resting heart rate varies with age and activity, with a typical range of approximately 80 to 130 beats per minute.

Technicians must also understand how central and peripheral pulses relate to one another. A pulse deficit represents the numeric difference between the auscultated apical rate and the palpated radial rate. When assessing heart rhythms, detecting extreme values requires urgent intervention. Promptly report an adult resting heart rate below 40 or above 140 beats per minute, and report other concerning rates according to symptoms, the patient's baseline, and facility protocol; these numbers are not universal critical-value cutoffs.