Welcome to Ask The Doctor.
We are here to help you.
What she is feeling is called as Palpitations. In her case this can be due to cardiac issues as she is having the pain radiation to left arm. However, I would also like to rule out Thyroid issues in cases of Palpitations.
Many a times, people on any medications can also feel the palpitations like people taking Salbutamol for Asthma.
I would advise you to get her following investigations done:
If they are normal, she should start practicing yoga and meditation.
I hope it helps.
These Q&A’s are for educational purposes and should not be relied upon as a substitute for medical advice you may receive from your physician. If you have a medical emergency, please call 911. These answers do not constitute or initiate a patient/doctor relationship.