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Left ventricular mural thrombus in a patient with thrombocytosis and agnogenic myeloid metaplasia
Insights
Left ventricular mural thrombi typically result from myocardial infarction or dysfunction. This case highlights thrombocytosis as a potential cause of left ventricular thrombi, even without endothelial damage.
Area of Science:
- Cardiology
- Hematology
Background:
- Left ventricular mural thrombi are commonly linked to endocardial injury from myocardial infarction and impaired left ventricular function.
- Arterial thrombi formation is typically initiated by endothelial damage.
Observation:
- A patient with thrombocytosis secondary to agnogenic myeloid metaplasia developed a left ventricular mural thrombus.
- This occurred without evidence of endothelial injury, coronary artery disease, or significant left ventricular dysfunction.
Findings:
- Thrombocytosis, a condition of elevated platelet count, can contribute to left ventricular mural thrombus formation.
- This case suggests a potential pathway for thrombus development independent of traditional risk factors like endothelial damage.
Implications:
- This finding expands our understanding of the etiology of left ventricular mural thrombi.
- It suggests that myeloproliferative disorders and associated thrombocytosis should be considered in the differential diagnosis of unexplained left ventricular thrombi.
Abstract:
The two factors responsible for the development of left ventricular mural thrombi are endocardial injury secondary to old or recent anterior myocardial infarction and left ventricular dysfunction. Endothelial damage also is thought to be the initial event in the development of arterial thrombi. However, arterial thrombi may develop in patients with thrombocytosis secondary to myeloproliferative disorders in the absence of endothelial injury. A patient had thrombocytosis secondary to agnogenic myeloid metaplasia and a left ventricular mural thrombus developed in the absence of clinical or laboratory evidence of old or coronary angiogram and left ventricular function. To our knowledge, this is the first such case reported.