Two Cases of Multiple Thromboembolism With Asymptomatic Atrial Fibrillation

A 70-year-old woman was brought to our hospital by ambulance due to syncope and hemiparalysis. Brain magnetic resonance imaging (MRI) and an electrocardiogram (ECG) showed the cerebral infarction and ST elevation without chest pain. The neurological findings were improved at the emergency outpatient service, therefore an emergency coronary angiography and aspiration for the thrombus was performed for acute myocardial infarction. An electrocardiogram monitor revealed asymptomatic and paroxysmal atrial fibrillation (AF) on the third day. In the other case, an 88-year-old woman was admitted to ambulatory care for abdominal pain, and the abdominal ultrasound showed findings of splenic infarction. Although there were no chest symptoms, AF was observed on the electrocardiogram at the time of admission. And endoscopic ultrasonography and brain MRI during hospitalization showed splenic infarction and multiple infarctions. Here, we report two cases with multiple thromboembolic complications associated with asymptomatic AF.