Heleen Lameijer was born in Delfzijl, on September 17, 1987. After primary school, high school followed, where she passed her exam in 2005 within two chosen profiles. After high school, she went to the city of Groningen to study Medicine. During her internships, she worked as an ergometrist at Cavari Clinics, a private clinic run by Dr.René van Dijk focused on the detection of cardiovascular diseases. During the training there, Heleen came into contact with semi-acute cardiology, which got her interested. Furthermore, she got acquainted with the cardiologist from the Martini Hospital, where she subsequently completed her medical training. During her last internships, she ran her own 'semi-acute chest pain’ outpatient clinic under the supervision of Dr. Jan Posma. In this period she wrote her first scientific article under the supervision of Dr. Robbert Steggerda. She completed her scientific internship under the supervision of Dr. Els (P.G) Pieper, titled 'Ischemic heart disease during pregnancy'. This internship ultimately resulted in the publication of three scientific articles. In 2012, Heleen obtained her master’s degree in Medicine and combined a clinical job within the Cardiology department at Martini Hospital, with a doctoral (PhD) trajectory under the supervision of Dr. Pieper and Prof. Dr. Dirk Jan van Veldhuisen.
Heleen gained experience in emergency cardiology awoke her passion for emergency medicine. In 2014 she started her residency (specialized medical training) in emergency medicine under the supervision of Prof. Dr. Jan ter Maaten and Dr. Jorrit Harbers, at the University Medical Centre Groningen. She completed this in 2017, under the supervision of emergency medicine physicians Drs. Amanda Drost and Drs. Evelien van der Meeberg. During her training as an emergency medicine physician, Heleen published several emergency medicine-related articles. These were mainly focused on emergency cardiovascular pathology and resuscitation, electrocardiography, procedural sedation and analgesia, and point-of-care ultrasound. She also continued her PhD trajectory during her medical training. This resulted in multiple scientific publications, poster presentations, and oral presentations at various national and international conferences. Heleen is currently working as an emergency medicine physician at the Medical Center Leeuwarden in the Netherlands. She combines a clinical with a scientific job, as a principal investigator and supervisor of several research projects in emergency medicine.