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Non-vitamin K antagonist oral anticoagulants (NOACs) are used to treat acute pulmonary embolism (PE). However, lower NOAC doses are often prescribed because of increased risk of NOAC complications. We sought to determine the incidence and clinical outcomes of patients with acute provoked PE receiving lower NOAC doses. 140 patients with acute PE with only NOACs used for medical management was enrolled and were followed up for 6 months. The composite primary endpoint was all-cause death, venous thromboembolism recurrence, and residual thrombus on follow-up computed tomography. Of the 140 patients, 99 (70.7%) received the standard NOAC dose and 41 (29.3%) received the lower dose. The crude incidences of the primary endpoint were 19 (19.2%) in patients who received the standard NOAC dose and 13 (31.7%) in those who received the lower dose. Compared with patients who received the standard dose, those who received the lower dose had no differences in the rate of primary endpoints (hazard ratio 1.140, 95% confidence interval 0.536–2.423,  p  = 0.733) during a median of 185 days. We found that up to 30% of patients received the lower dose of NOACs for acute PE in clinical practice. Clinical outcomes with appropriate underdoing of NOAC treated in acute PE might not increase compared to the standard NOAC doses.

acta cardiologica

Clinical outcomes of patients who received a lower dose of non-vitamin K antagonist oral anticoagulants for the medical management of acute pulmonary embolism