MSc A.S.M. Steijlen

PhD student
Electronic Instrumentation (EI), Department of Microelectronics

Expertise: Integrated Product Design, Smart Clothing, Design for medical applications. Themes: Biomedical devices


Annemarijn Steijlen was born in Nijmegen, the Netherlands in 1993. She received her bachelor’s degree and master’s degree in Industrial Design Engineering (both cum laude) from Delft University of Technology. Annemarijn’s main research interests are smart materials and wearable sensor technology. During her graduation project she designed a mobile 12-lead electrocardiographic system for home use.

She is currently a PhD student working on sensor technology for unobtrusive athlete monitoring within the Citius Altius Sanius Programme, a nationwide research consortium that aims to make injury-free exercise possible for everyone.


  1. Analyzing sweat to determine state of fatigue
    Miguel Thomas; Andre Bossche; Pim Groen; Jeroen Bastemeijer; Annemarijn Steijlen; Paddy French;
    In Proceedings SSI conference,
    Barcelona, Spain, April 2019.

  2. A Novel 12-Lead Electrocardiographic System for Home Use: Development and Usability Testing
    Annemarijn SM Steijlen; Kaspar MB Jansen; Armagan Albayrak; Derk O Verschure; Diederik F Van Wijk;
    JMIR mHealth and uHealth,
    Volume 6, Issue 7, pp. e10126, July 2018. DOI: 10.2196/10126
    Abstract: ... Background: Cardiovascular diseases (CVD) are the leading cause of morbidity and mortality worldwide. Early diagnosis is of pivotal importance for patients with cardiac arrhythmias and ischemia to minimize the consequences like strokes and myocardial infarctions. The chance of capturing signals of arrhythmias or ischemia is substantially high when a 12-lead electrocardiogram (ECG) can be recorded at the moment when a patient experiences the symptoms. However, until now, available diagnostic systems (Holter monitors and other wearable ECG sensors) have not enabled patients to record a reliable 12-lead ECG at home. Objective: The objective of this project was to develop a user-friendly system that enables persons with cardiac complaints to record a reliable 12-lead ECG at home to improve the diagnostic process and, consequently, reduce the time between the onset of symptoms and adequate treatment. Methods: Using an iterative design approach, ECGraph was developed. The system consists of an ECG measurement system and a mobile app, which were developed with the help of several concept tests. To evaluate the design, a prototype of the final design was built and a final technical performance test and usability test were executed. Results: The ECG measurement system consists of a belt and 4 limb straps. Ten wet Ag/AgCl electrodes are placed in the belt to optimize skin-electrode contact. The product is controlled via an app on the mobile phone of the user. Once a person experiences symptoms, he or she can put on the belt and record ECGs within a few minutes. Short instructions, supported by visualizations, offer guidance during use. ECGs are sent wirelessly to the caregiver, and the designated expert can quickly interpret the results. Usability tests with the final prototype (n=6) showed that the participants were able to put on the product within 8 minutes during first-time use. However, we expect that the placement of the product can be executed faster when the user becomes more familiar with the product. Areas of improvement focus mainly on confidence during product use. In the technical performance test, a 12-lead ECG was made and reproduced 6 times. Conclusions: We developed a new 12-lead ECG system for home use. The product is expected to be more user-friendly than current hospital ECG systems and is designed to record more reliable data than current ECG systems for home use, which makes it suitable for expert interpretation. The system has great potential to be incorporated into an outpatient practice, so that arrhythmias and ischemia can be diagnosed and treated as early as possible.

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Last updated: 15 Jul 2019

Annemarijn Steijlen