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Aims The 2019 European Society of Cardiology (ESC) guidelines provide a revised definition of high-risk pulmonary embolism (PE) encompassing three clinical presentations: Cardiac arrest, obstructive shock, and persistent hypotension. This study investigated the prognostic implications of this new definition. Methods and results Data from 784 consecutive PE patients prospectively enrolled in a single-centre registry were analysed. Study outcomes include an in-hospital adverse outcome (PE-related death or cardiopulmonary resuscitation) and in-hospital all-cause mortality. Overall, 86 patients (11.0%) presented with high-risk PE and more often had an adverse outcome (43.0%) compared to intermediate-high-risk patients (6.1%; P Graphical Abstract |