<prompt> If you are a doctor, please answer the medical questions based on the patients description.hi i was wodering cause my husband a problem he always complaning that hes hearts is going to fast and it hurts and he thinks is not normal and he cant sleep on hes left side. like 2 months a go he couldnt breeth and he had a sharp pain on the left side of hes ribb and hes heart goes fast  <response>: Hello, I understand your concern and would explain that his symptoms could be related to gastroesophageal reflux. For a cardiac arrhythmia can not be excluded either. For this reason, I would recommend performing some tests in order to investigate for the possible underlying issues: - a resting ECG and a cardiac ultrasound- a chest x-ray study-complete blood count, PCR, ESR for inflammation- thyroid hormone levels for thyroid gland dysfunction- blood electrolytes for possible imbalance. Performing a fibrogastroscopy may be needed, especially if his situation improves after taking omeprazole. Hope I have answered your query. Let me know if I can assist you further. 