Ciudad Juárez, Chihuahua, Mexico – Dejanira Patricia Muñiz Escobar, a 25-year-old medical student from the Biomedical Sciences Institute (ICB) at the Autonomous University of Ciudad Juárez (UACJ), has brought international recognition to her university and country. While still in her social service stage, Muñiz Escobar presented her research on the clinical follow-up of patients with subcutaneous defibrillators at the Latin American Heart Rhythm Society (LAHRS) Scientific Sessions and the 14th Argentine Congress of Arrhythmias in Buenos Aires, Argentina, yesterday, June 2, 2026.
From Ciudad Juárez to International Cardiology Elite
Most medical students focus on passing exams and meeting academic demands. However, Dejanira Patricia Muñiz Escobar chose to add another challenge to her training: high-level scientific research. Her dedication led her to represent Mexico at one of the most important arrhythmia congresses in Latin America.
Her work garnered significant attention, even from international specialists and evaluators who initially assumed she was already pursuing a medical residency. “When I told them I was still a student, they were very surprised. That was a great boost for me,” she recalled.
Understanding Subcutaneous Defibrillators
The research presented by Dejanira focused on patients at risk of severe arrhythmias or cardiac arrest, who require the implantation of defibrillators capable of detecting electrical heart alterations and delivering shocks to correct them. A subcutaneous implantable cardioverter-defibrillator (S-ICD) is a device that detects and corrects rapid, life-threatening heart rhythms, known as arrhythmias-an irregular heartbeat. If an arrhythmia is detected, the device quickly sends an electrical shock to the heart, returning its rhythm to normal. This process is called defibrillation, according to MedlinePlus, the portal of the U.S. National Library of Medicine (NLM).
Traditionally, these devices are placed using wires that enter the venous system to reach the heart. However, the subcutaneous defibrillator operates differently: it is implanted under the skin without the need to access veins. Although this technology has only been in use for about a decade and its cost can exceed 500,000 pesos per procedure, it represents a crucial alternative for pediatric patients or those with heart malformations. “In some patients, venous access can be very complicated. The subcutaneous system reduces complications and facilitates the procedure,” Muñiz Escobar explained.
Groundbreaking Research: Avoiding Unnecessary Procedures
Muñiz Escobar’s investigation analyzed approximately 150 patients treated between 2020 and 2025 at a national high-specialty institute. The primary finding was that certain procedures, typically considered routine, might not be necessary. After a defibrillator is implanted, an arrhythmia is usually induced under controlled conditions to ensure the device functions correctly. However, this test involves stress and risks for the patient.
“We observed that patients who underwent the test and those who did not had very similar outcomes,” she indicated. This finding aligns with recent medical guidelines that are beginning to question the necessity of performing this test in all cases. Beyond its technical impact, the study contributes to a broader discussion in contemporary medicine about reducing invasive procedures when they do not offer real clinical benefits.
A Northern Student in a Field Dominated by Major Universities
At national and international medical conferences, institutions like the National Autonomous University of Mexico (UNAM) or the Benemérita Autonomous University of Puebla (BUAP) are frequently mentioned. For Dejanira, representing a border university also meant challenging certain academic preconceptions. “In the center and south of the country, it’s common to hear about those universities, but less about northern institutions. I believe that little by little, the academic level of our university and its students is starting to be recognized,” she noted.
The experience also had a cultural and human dimension. In addition to medical learning, Muñiz Escobar highlighted the value of interacting with specialists from different countries and understanding diverse approaches to medicine. A particularly memorable moment for her was meeting Dr. Pedro Brugada, one of the discoverers of Brugada syndrome, a genetic heart condition detectable via electrocardiogram. “Being able to talk with him and see his humility as a person was something that deeply impacted me,” she shared. For any cardiology student, this encounter would be akin to conversing with a living historical figure in the specialty.
Muñiz Escobar’s personal experience solidified her professional path, one she had envisioned for years. “I was very excited because for a long time I’ve known I want to dedicate myself to cardiology, specifically electrophysiology,” she explained. “Participating as a student in a highly specialized congress was a very important step.”
