Intra-cardiac thrombus resolution after anti-coagulation therapy with dabigatran in a patient with mid-ventricular obstructive hypertrophic cardiomyopathy: a case report

INTRODUCTION Although dabigatran, a novel oral anti-coagulant, has been approved for the prevention of thromboembolism in patients with non-valvular atrial fibrillation, the efficacy of dabigatran for the resolution of established intra-cardiac thrombi has not been validated. Herein is describe a case in which dabigatran was effective for thrombus resolution in a patient with a left ventricular aneurysm. CASE PRESENTATION A 59-year-old Japanese man with a mid-ventricular obstructive hypertrophic cardiomyopathy-associated apical aneurysm presented with a left ventricular apical thrombus (15.0mm×17.0mm). Anti-coagulation therapy with dabigatran (150mg b.i.d. with meals) was initiated. Following dabigatran administration, weekly echocardiographic examinations demonstrated gradual decreases in thrombus size. After three weeks, no thrombus was detected and no systemic thromboembolic events had occurred. CONCLUSIONS The left ventricular apical thrombus resolved after dabigatran administration. Hence, dabigatran may represent an alternative to warfarin as a therapeutic option in patients with previously detected intra-cardiac thrombus.