I have panic dis/sometimes when im sitting i get sinking feeling in chest like my heart stopped. have had ekg and is normal..is this anxiety related?

Sinking feeling: Though panic disorder can cause chest symptoms any new occurrences should be evaluated,an extended ECG monitor such as 24-48 hr Holter ECG or a 30 day event monitoring device should help clarify matters.If not recently performed a few basic lab values should be checked.Anxiety as a cause is a diagnosis of exclusion so see a physician