What Researchers Did
Researchers reported a case of a 47-year-old woman who developed variant angina (coronary artery spasm without blockage) following accidental carbon monoxide poisoning from soot inhalation.
What They Found
Coronary angiography showed no stenosis, confirming the diagnosis of CO-induced coronary spasm. ECG showed progressive ST elevation and T-wave changes consistent with myocardial ischemia. The patient improved with anticoagulation and HBOT.
What This Means for Canadian Patients
CO poisoning can cause coronary artery spasm even without structural heart disease -- an important point for Canadian emergency cardiologists and emergency physicians who may otherwise dismiss chest pain in CO poisoning patients with clean coronaries.
Canadian Relevance
Carbon monoxide poisoning is an OHIP-covered indication for HBOT in Ontario.
Study Limitations
This is a single case report; the mechanism is plausible but cannot be confirmed without systematic study of CO-induced vascular effects.