Hi Thanks for posting on HCM Elevated heart rate/palpitation and discomfort in chest could be caused by many medical pathologies.Possible causes may include: -Heart problems/hypertensive heart diseases -Respiratory pathologies -Strong emotional responses -Strenuous exercise -Drugs -Hormone changes like hyperthyroidism and Hormone changes associated with menstruation, pregnancy or menopause -Imbalance of electrolytes -And others I will suggest you see the Doctor for evaluation and investigations.You will need to have you BP checked as well.Tests that may help identify the cause of your symptoms may include: chest x ray, ECG, Echocardiogram, serum electrolytes, full blood count and others depending on the diagnostic orientation of the Doctor.Your treatment will depend on the identified underlying cause.In the meantime, i will advise the following: *Exercise and eat a healthy diet *Maintain a healthy weight *Keep blood pressure and cholesterol levels under control *Avoid smoking *Drink in moderation *Don t use recreational drugs like cocaine *Limit caffeine *Reduce stress or anxiety Hope this will help you Wish you good health