Hello! Welcome and thank you for asking on HCM! Regarding your concern, I don t think that your symptoms are related to any cardiac disorders. Your cardiac performed tests have a shown an normal heart function and structure and have excluded any possible coronary artery disease. Coming to this point, I would recommend performing further tests to investigate for other possible causes of this symptomatology: - a chest X ray study and respiratory function tests to exclude a possible lung disorder - an arterial blood gas analysis - inflammation tests (PCR, sedimentation rate) for possible inflammation - a cervico-thoracic spine X ray study for possible chronic degenerations of the spine, which could cause similar symptoms. You should discuss with your doctor on the above issues. Another advice I would give is to try taking an antiacid or a PPI (omeprazole, lansoprazole). If your symptoms are relieved by these drugs it may indicate possible gastro-esophageal reflux. A fibrogastroscopy may be needed in such case. Hope you will find this answer helpful! Kind regards, Dr. Iliri