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Coronary dissection and myocardial infarction following blunt chest trauma
Insights
Blunt chest trauma can cause myocardial infarction (MI) due to coronary artery dissection. Early diagnosis with electrocardiography and coronary angiography is crucial for identifying this rare but serious condition.
Area of Science:
- Cardiology
- Trauma Surgery
- Diagnostic Imaging
Background:
- Myocardial infarction (MI) after blunt chest trauma is often misdiagnosed, with pain attributed to chest wall injury.
- Coronary pathology associated with traumatic MI is infrequently reported, complicating diagnosis and management.
Observation:
- This report details three cases of acute anterior MI secondary to coronary artery dissection following blunt chest trauma.
- Coronary angiography revealed intimal tears in the left anterior descending artery (LAD) in two patients and near-total LAD occlusion with possible thrombus in another.
- All patients underwent conservative treatment and showed no major complications or symptoms during a 5-year follow-up.
Findings:
- Coronary artery dissection is a significant cause of myocardial infarction following blunt chest trauma.
- Electrocardiography is essential for excluding MI in trauma patients, with coronary angiography indicated for suspected coronary pathology.
Implications:
- Accurate differentiation of traumatic MI from other chest pain causes is critical.
- Coronary angiography is vital for diagnosing dissection and guiding treatment in suspected cases of traumatic MI.
- Understanding coronary dissection as a mechanism for traumatic MI improves diagnostic accuracy and patient outcomes.
Abstract:
Myocardial infarction (MI) following blunt chest trauma is rarely diagnosed because the ensuing cardiac pain is commonly attributed to contused myocardium or the traumatic injuries in the local chest wall. There are only scattered reports on the coronary pathology associated with MI secondary to blunt chest trauma. Because differentiation of the pathology is difficult but important, we report here three cases of acute anterior MI secondary to coronary dissection following blunt chest trauma. Coronary dissection was demonstrated by coronary angiography. Two of the patients had intimal tears at the proximal left anterior descending artery (LAD) with normal flow, and the other patient had nearly total occlusion of the LAD associated with filling defects probably caused by an intracoronary thrombus. All three patients received conservative treatment without major complications and remained free from angina or heart failure throughout a 5-year follow-up period. In order to exclude associated MI in cases of blunt chest trauma, electrocardiography is necessary, and coronary angiography may be indicated to demonstrate coronary arterial pathology. Dissection of the coronary artery with subsequent thrombus formation is one of the possible pathophysiologic mechanisms of MI following blunt chest trauma.