This study involves patients experiencing Acute Myocardial Infarction, which is a serious condition that occurs when blood flow to a part of the heart muscle becomes blocked, causing chest pain. The study will compare two different pain-relieving medications used before patients reach the hospital. One medication is methoxyflurane, which is given as a vapor that patients breathe in themselves through an inhaler device. The other medication is morphine, which is given through a vein as an injection. The main purpose of this study is to find out if methoxyflurane is at least as effective as morphine in reducing chest pain in patients with this heart condition.
During the study, patients will receive one of the two pain medications when emergency medical services arrive to help them. The medication will be given to patients who have moderate to severe chest pain. Throughout the treatment, medical staff will measure how much the pain decreases and how quickly the pain relief occurs. They will use a pain scale where patients rate their pain from zero to ten, with higher numbers meaning more pain. The goal is to bring the pain level down to three or below.
The medical team will also monitor several other aspects during and after treatment. They will check how long it takes for the pain to reduce by half and how long it takes to reach low pain levels. They will measure heart rate, blood pressure, oxygen levels in the blood, and heart electrical activity when patients arrive at the hospital. The study will also track any unwanted effects from the medications, such as slow breathing, excessive sleepiness or agitation, dizziness, itching, nausea, vomiting, or headache. Each patient will receive treatment for one day as part of their emergency care.
France 
