The spiked helmet sign in severe sepsis: an unusual electrocardiographic finding in a critically ill patient.

Background: The 'spiked helmet' sign is a rare electrocardiographic (ECG) phenomenon characterized by transient ST-segment elevations mimicking an acute coronary syndrome, typically seen in critically ill patients. While often associated with severe physiological stress, its presence in sepsis is particularly uncommon. Case Presentation: A 68-year-old male with a history of hypertension and diabetes mellitus presented to the emergency department with fever, altered mental status, and hypotension. Initial workup revealed severe sepsis secondary to pneumonia. His ECG showed pronounced ST-segment elevations in leads II, III, and aVF, with a distinctive 'spiked helmet' pattern. Troponin levels were mildly elevated, raising concerns for concurrent myocardial ischemia. However, the patient denied chest pain, and further cardiac evaluation, including echocardiography, showed no evidence of ischemia or infarction. Intensive care management included broad-spectrum antibiotics, intravenous fluids, and vasopressors. Despite the severity of his illness, the patient's condition gradually improved, and repeat ECGs showed resolution of the ST-segment elevations. The 'spiked helmet' sign was attributed to severe sepsis-induced autonomic dysfunction rather than primary cardiac pathology. Conclusion: This case highlights the importance of recognizing the 'spiked helmet' sign as a marker of severe stress in critically ill patients, which may mimic myocardial ischemia on ECG. Prompt differentiation between this sign and true ischemia is crucial to avoid unnecessary interventions and focus on managing the underlying critical illness.