Warfarin: Lack of efficacy : case report.

A 59-year-old man with a history of myocardial infarction, decompensated heart failure, and hypertension experienced a lack of efficacy during treatment with warfarin for a left ventricular thrombus. He developed symptoms such as fatigue, edema, and decreased urinary output, leading to hospitalization for decompensated heart failure. Despite being on warfarin, he later developed right hemiplegia, dysarthria, and worsening consciousness, and intracardiac thrombi were detected. This case highlights a lack of efficacy of warfarin in this particular patient. [Extracted from the article]