Conversation: The conversation between human and AI assistant.
[|Human|] Recently my heart has been pounding very hard immediately after standing. I am a 43 yr old man that smokes and drinks, but not heavily. I did have some anxiety from stress several months ago, but this heart pounding is not the same symptoms. I have trouble catching my breath, it feels like my heart is racing, but it isn t really, just pounding through my chest and throat. I typically can make it feel better by taking deep breaths. I was wondering if it is a lack of oxygen in my blood? Maybe not resting fully. But they I noticed below that tachycardia may be the cause? I have had ECG s and have worn a heart monitor and there is nothing seemingly wrong with my ticker. I can also almost feel when it is going to happen as my legs feel like i just ran a sprint. My quads ache like they are full of latic acid. Any suggestions? Thank you
[|AI|]  Hi Thereafter going through your query I understand your concern. I would like to tell you the symptoms you are telling, pounding heart and breathlessness can happen in both conditions heart diseases and stress. If you feel breathless during exertion and feel better after resting then it can be due to underlying heart disease and It's advisable to get a Treadmill test and echocardiography done for proper evaluation. And It's advisable to cease smoking for better health. Hopefully this will answer your querying you Good Luck Chat Doctor.