Mimicking myocardial infarction: a subarachnoid haemorrhage case report.

We present a case detailing the diagnostic challenges of a 23-year-old male presenting with a sudden severe headache, nausea, vomiting, and chest heaviness. Initial evaluation showed elevated blood pressure and respiratory rate. An emergency electrocardiogram (ECG) indicated ST-segment elevation myocardial infarction (STEMI), leading to immediate referral for percutaneous coronary intervention, which revealed normal coronary arteries. Further investigations identified a cisternal subarachnoid haemorrhage (SAH) on CT brain imaging. Despite multidisciplinary management, the patient's condition rapidly deteriorated, resulting in cardiac arrest and mortality. Our case highlights the importance of thorough evaluation and multidisciplinary collaboration in managing complex presentations, emphasizing vigilance in recognizing and managing concurrent pathologies in young patients with acute symptoms.