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Coronary embolism and myocardial infarction associated with nonbacterial thrombotic endocarditis
Insights
Nonbacterial thrombotic endocarditis, often linked to cancer, can cause coronary embolism and myocardial infarction. Early diagnosis via ECG and enzyme studies is crucial for patient outcomes.
Area of Science:
- Cardiology
- Oncology
- Pathology
Background:
- Nonbacterial thrombotic endocarditis (NTBE) is a rare condition.
- NTBE is associated with hypercoagulable states, particularly malignant neoplasms.
- Coronary embolism and myocardial infarction are potential complications.
Observation:
- A ten-year study at Mount Sinai Hospital identified six cases of NTBE.
- All patients had an underlying malignant neoplasm.
- Vegetations were observed on various heart valves, including aortic, mitral, tricuspid, and pulmonic.
Findings:
- Coronary embolism and myocardial infarction were significant complications in these cases.
- Neurologic symptoms due to cerebral embolization complicated clinical diagnosis.
- Electrocardiographic and serum enzyme studies aided in diagnosis.
- Myocardial infarction led to death in three of the six patients.
Implications:
- Highlights the critical link between malignancy and thromboembolic events.
- Emphasizes the diagnostic challenges of NTBE, especially with concurrent neurologic deficits.
- Underscores the importance of considering NTBE in cancer patients with unexplained cardiac or neurologic events.
- Suggests a need for further research into the hypercoagulability and disseminated intravascular coagulation associated with NTBE.
Abstract:
Six cases of coronary embolism and myocardial infarction associated with nonbacterial thrombotic endocarditis were seen at the Mount Sinai Hospital over a ten-year period. Every patient had an underlying malignant neoplasm. The vegetations were found on aortic, mitral, tricuspid and pulmonic valves and were located on the free or closure margins. The clinical diagnosis of this condition is difficult because of simultaneous embolization to the brain, causing widespread neurologic symptoms, but could be made by electrocardiographic and serum enzyme studies. Myocardial infarction caused the deaths of three patients. The relationship between nonbacterial thrombotic endocarditis, hypercoagulability, and disseminated intravascular coagulation is discussed.