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Electrocardiogram
Published in Kayvan Najarian, Robert Splinter, Biomedical Signal and Image Processing, 2016
Kayvan Najarian, Robert Splinter
An important disease that is often detected in the frequency domain is sinus tachycardia. A sinus rhythm of higher than 100 beats per minute is called sinus tachycardia. Similar conditions often occur as a physiological response to physical exercise or physical stress, but, in diseased cases, the condition results from congestive heart failure. More specifically, if the sinus rhythm is irregular such that the longest PP or RR intervals exceed the shortest interval by 0.16 s, the situation is diagnosed as sinus arrhythmia. This condition is very common in all age groups but more common in teenagers and preteens who may have never considered having a heart disease. One potential origin for the sinus arrhythmia may be the vagus nerve, which regulates respiration as well as heart rhythm. The nerve is active during respiration and through its effect on the sinus node, causes an increase in heart rate during inspiration and a decrease during expiration.
What Are the Users’ Needs? Design of a User-Centered Explainable Artificial Intelligence Diagnostic System
Published in International Journal of Human–Computer Interaction, 2023
Xin He, Yeyi Hong, Xi Zheng, Yong Zhang
After receiving applications from potential participants who met the above criteria, we considered their differences in AI knowledge and discipline distribution and finally identified eight focus group members (see Table 4). According to Ribera and Lapedriza (2019), users of AI systems can be classified into three types: developers and AI researchers, domain experts, and end users. End users usually don't have a deep understanding of both AI and AI's application areas. The consumer group in our research belongs to the end users of the system. Therefore, we chose most of the participants who rated themselves as having low and average AI knowledge. Given that end users have different technical backgrounds (Colborne, 2017), and not all of them know little about AI, we also recruited a participant who rated himself as having a moderately high level of AI knowledge. In addition, it should be noted that sinus tachycardia is a condition of arrhythmia with a relatively high incidence, especially among young people. All applicants in this recruitment are patients previously diagnosed with sinus arrhythmia (Table 4).