Abstract
Controlled hyperventilation leading to respiratory alkalosis may induce coronary artery spasm. This manoeuvre is currently used in the diagnosis of Prinzmetal's angina.We describe the case of a comatose patient with tracheostomy in whom hyperventilation, caused by excessive bronchial secretion resulting in partial obstruction of the tracheal cannula, was followed by ST segment elevation mimicking acute myocardial infarction.
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