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The article by Kranjec et al. [1], “Novel methods of noncontact heart rate measurement: A feasibility study” is interesting and informative as it compares different contactless methods for heart rate detection. Nevertheless, the use of the term “capacitively coupled ECG” (CCECG) in the article is confusing and may mislead readers. That article studies the feasibility of four noncontact methods for heart rate measurement, which are classified in two groups: “the methods measuring electromagnetic energy generated by the bioelectrical activity within the cardiac muscle (referred to as direct methods), and the methods measuring displacement of a part of the subject’s body caused by the periodic physical contractions of the heart (referred to as indirect methods). The first group is represented by a measuring device which detects changes in surrounding electric field...” [sic]. Later on, this device is described in [1] as being based on “capacitively coupled electrodes” and hence termed “CCECG Measuring Device.” The electrodes are two 48-cm2 metal plates placed side by side (see [1, Fig. 3]) placed at distances from 5 to 60 cm from the chest.

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