Conversation: The conversation between human and AI assistant.
[|Human|] Heart beatMy heart beats go from very slow to fast and pounding. I have many dx pvcs & pacs daily. Heart structure is normal. My heart pounds so hard it vibrates throughout my whole body...leaves me feeling exhausted. I used to run 2~3 miles a day.... What could this be?
[|AI|]  Hello! Welcome and thank you for asking on Chat Doctor! I understand you concern, and would explain that your symptoms may be related to a cardiac arrhythmia. Anxiety and some metabolic disorders (like thyroid dysfunction, a Chat Doctor. ) could also mimic this clinical scenario. It is normal to have some PACs and PVC's during the day. But what is their frequency in your case? I would like to know more about your past medical history. Do you suffer from high blood pressure or diabetes? What tests have you performed to examine your cardiac function? As far as I understand a resting ECG and a cardiac ultrasound have been performed (you mention PVC's, PACs and a structurally normal heart)You should consult with your GP for a careful physical exam, a chest x-ray and some blood tests (besides resting ECG and cardiac ultrasound) :- complete blood count (for chronic anemia)- PCR, sedimentation rate (for chronic inflammation)- fasting glucose-thyroid hormone levels-cortisol plasma levels (a