Overview

• Martín Arellano began posting at 12:34 on September 4 that he had a probable heart attack and could not get help through the IMSS Código Infarto app, tagging IMSS leadership and the president.
• He reported initial stabilization by the Cruz Roja and later showed a one‑second video at 17:53 from a corridor after being moved to IMSS HGZ/MF No. 3 in Mazatlán.
• IMSS states he arrived at 16:28, received labs and electrocardiograms that did not show an acute myocardial infarction, and was treated for cardiac and renal insufficiency.
• According to the IMSS account, he was intubated after deteriorating, suffered two cardiac arrests despite advanced resuscitation, and died at 02:25 on September 5.
• Officials note the hemodynamics lab for high‑complexity infarct care is in Culiacán, with a Mazatlán unit described as about to begin operation, as colleagues share condolences and plan a memorial.