Date of Award


Degree Type



Education and Human Services

First Advisor

Sparks, Kenneth

Subject Headings

Electrocardiography, Heart rate monitoring, Cardiology -- Research, Health Sciences


Purpose: To determine whether a 12-lead electrocardiogram (ECG) using five dry electrodes in the modified EASI electrode position in the CardioWare harness can be derived from a standard 12-lead ECG during rest, ambulatory walking, and strenuous walking on a treadmill. Methods: Thirty healthy men (n=15) and women (n=15), ages 20-54 years, from Cleveland State University and the surrounding community participated in this study. Each subject served as their own control as they were connected to both types of ECG simultaneously (Modified EASI CardioWare and Standard Mason-Likar). Data was collected from both ECG placements for five minutes of rest (Trial A) and during Trial B for two intensities of exercise. The first half of Trial B included rest and ambulatory walking (Stage 1: standing rest and Stage 2: walking 1.7mph, 0 incline). The second half of Trial B consisted of strenuous walking and recovery (Stage 3: walking 1.7mph, 10 incline, Stage 4: walking 2.5mph, 12 incline, and Stage 5: standing recovery). Paired samples t-tests were used to compare the two electrode placements. Results: There was no significant difference between the root mean square error (RMSE) of the two different types of electrode placements during either the first half or the second half of Trial B (p > .05). All correlations were robust (r range= 0.658 - 0.942) and significant (p =0.0001). The subjective goodness of fit measure based on the overlay of both types of ECGs was similar. Conclusions. It can be concluded that the modified EASI derived 12-lead ECG is an acceptable alternative to the standard 12-lead ML system at rest, ambulatory, and strenuous walking

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