https://revistas.uautonoma.cl/index.php/ijmss <p><strong>International Journal of Medical and Surgical Sciences</strong>, (IJMSS) is a serial and peer-review publication, edited by the Universidad Autónoma de Chile. IJMSS has an international scope, is open access and uses a License Creative Commons 4.0 International (CC BY 4.0). The contents are available in open access immediately after being published.</p> <p><strong>Objective</strong>: To publish original research papers within the medical and surgical sciences, on all basic scientific aspects of structure, chemistry, developmental biology, physiology and pathology of relevant tissues, microbiology, biomaterials, and behavioral sciences. In general, analytical studies are preferred to descriptive ones.</p> <p><strong>Vision</strong>: IJMSS seeks to be a space for academic discussion and multidisciplinary dialogue in the area of biomedical, medical and surgical sciences in all its aspects, which contributes to scientific communication between research peers and academics in the area.</p> <p><strong>Aimed to</strong> professionals and academics in the field of medical and surgical sciences, health administration, and related specialties.</p> <p>The Journal Publishes in continuous publication schema (four issues per year), original articles, reviews, short communications and letters to the editor in English and Spanish. The IJMSS <strong>has no article processing charges (APC)</strong> or article submission charges for any of the editorial processes or publication.</p> <p><strong>e-ISSN</strong> 0719-532X</p> <p><strong>p-ISSN</strong> 0719-3904</p> Universidad Autónoma de Chile en-US International Journal of Medical and Surgical Sciences 0719-3904 <p>La publicación se distribuye bajo la <a href="https://creativecommons.org/licenses/by/4.0/">Licencia <em>Creative Commons</em> Atribución- 4.0 Internacional</a> (<a href="https://creativecommons.org/licenses/by/4.0/">CC BY 4.0</a>). Los derechos de los trabajos publicados en esta revista son propiedad del autor, los cuales son libres de distribuir y difundir las mismas, siempre que cite correctamente la fuente.</p> https://revistas.uautonoma.cl/index.php/ijmss/article/view/2792 <p>Shock, a medical emergency characterized by inadequate perfusion and organ dysfunction, can be classified as distributive, hypovolemic, cardiogenic and obstructive. Point-of-care ultrasound (POCUS) has established itself as a fundamental tool in the differential diagnosis and therapeutic guidance in patients with shock. This article reviews the clinical utility of POCUS, highlighting its high diagnostic accuracy in differentiating types of shock, with sensitivities and specificities greater than 90% in scenarios such as hypovolemic and obstructive shock. In addition, the use of POCUS has been shown to improve diagnostic accuracy in the emergency department, optimize hydric resuscitation and reduce mortality in critical patients. Its implementation strengthens clinical decision making, integrating a rapid and effective diagnostic approach that favors interdisciplinary management to prevent multiorgan failure and death.</p> Juan Santiago Serna Trejos Stefanya Geraldine Bermúdez – Moyano Manuela Castaño – Orozco Vanessa Montoya – Valencia Juan Camilo Diaz – Beltrán Melissa Martínez – Garcia Henry Fernando Botero – Suárez Copyright (c) 2025 Juan Santiago Serna - Trejos, Stefanya Geraldine Bermúdez – Moyano, Manuela Castaño – Orozco, Vanessa Montoya – Valencia, Juan Camilo Diaz – Beltrán, Melissa Martínez – Garcia, Henry Fernando Botero – Suárez https://creativecommons.org/licenses/by/4.0 2025-01-17 2025-01-17 12 1 1 17 10.32457/ijmss.v12i1.2792 https://revistas.uautonoma.cl/index.php/ijmss/article/view/2997 Ximena González Berta Cerda Ana María Ciudad Isabel Abarca Diego Rojas Rossana Guerrero Carmen Gloria San Martin Juvenal A. Ríos Leal, MD, PhD Copyright (c) 2025 Juvenal A. Ríos Leal, MD, PhD, Ximena González, Berta Cerda, Ana María Ciudad, Isabel Abarca, Diego Rojas, Rossana Guerrero, Carmen Gloria San Martin https://creativecommons.org/licenses/by/4.0 2025-04-02 2025-04-02 12 1 1 4 10.32457/ijmss.v12i1.2997 https://revistas.uautonoma.cl/index.php/ijmss/article/view/2773 <p>Background: Ventricular capture failure could be a sign of macrodisplacement. Electrode displacement is one of the complications related to cardiac pacing. Knowing the different production mechanisms of macrodisplacements is not just for a nominal distinction. It is important to understand that the mechanisms are different, that´s why each type of macrodisplacement requires different form of therapy. Case report: A 79-year-old male patient. On physical examination, the heart rate was 38 beats per minute. The 12-lead electrocardiogram (ECG-12) showed a second-degree 2:1 atrioventricular block. It was decided to implant a VVIR pacemaker. On follow-up, the ECG-12 review showed ventricular capture failure without spike and 2:1 atrioventricular block. The fluoroscopic study showed electrode displacement. The distal tip of the electrode was in the area of the pacemaker pocket with radiological appearance of thread wound on a reel. Reintervention was immediately decided, during surgery, the diagnosis of reel type macrodisplacement was corroborated. The lead was repositioned in the right ventricle. Conclusions: Knowledge of the risk factors allows us to avoid macrodisplacement syndromes of the electrode. Knowing the different mechanisms of production of the three syndromes described is of great importance to finally carry out the appropriate therapy.</p> Armando E. Hernández Castellón Fernando Rodríguez González Juan Miguel Cruz Elizundia Elibet Chávez-González Copyright (c) 2025 Armando E. Hernández Castellón, Fernando Rodríguez González, Juan Miguel Cruz Elizundia, Elibet Chávez-González https://creativecommons.org/licenses/by/4.0 2025-02-25 2025-02-25 12 1 1 8 10.32457/ijmss.v12i1.2773