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This is Dr. Bonilla, experienced in Internal Medicine, Pulmonary and Critical Care.
I understand your concerns. The vein that you felt under your right breast is a non specific finding and is unlikely to be related to the Afib. Afib can cause palpitations and sometimes discomfort on the chest related to palpitations. At the moment you are on anticoagulation and this is the right treatment. Please rate my answer. Let me know if you have any other questions.
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