AUTHOR=Yu Jinmei , Zhou Lin , Yang Chengying , Kou Xingyuan , Li Le , Fan Xinrong , Liu Xing TITLE=Case report of severe coronary artery disease complicated by malignant arrhythmia due to inherited thrombophilia JOURNAL=Frontiers in Cardiovascular Medicine VOLUME=Volume 12 - 2025 YEAR=2025 URL=https://www.frontiersin.org/journals/cardiovascular-medicine/articles/10.3389/fcvm.2025.1517117 DOI=10.3389/fcvm.2025.1517117 ISSN=2297-055X ABSTRACT=The principal clinical manifestation of thrombophilia is venous thromboembolism, which is also markedly linked to arterial thrombosis, including myocardial infarction. Nevertheless, patients presenting with an early-onset myocardial infarction are seldom screened for thrombophilic genes, resulting in delayed diagnosis and an unfavourable prognosis. This report presents the case of a young man who suffered an acute myocardial infarction as a result of thrombophilia. The patient had a history of deep vein thrombosis and was genetically tested to carry two thrombophilia susceptibility alleles at the PAI-1 (4G/5G) and MTHFR (C > T) loci. This ultimately resulted in severe coronary artery occlusion, myocardial scarring and frequent episodes of ventricular tachycardia, which had a significant impact on the patient's quality of life. The objective of this report was to enhance clinicians' awareness of embolism susceptibility. It is recommended that young and middle-aged patients with severe coronary artery stenosis undergo screening for embolism.