My wife started left hand pain in the evening. After dinner when she came for sleeping everything was normal. No stress no tension. Only left hand pain was there. When she was laying on bed she started sudden severe pain in chest for a few minutes. Pain was very severe. She get nausea and mild cough. We take her to the general physician. He done ECG, Stress test and Pulse with oxygen saturation. All Reports were normal. I want to know the cause of pain whether it was cardiac or non cardiac. Pls help. Her body weight and height is absolutely normal. Pls need second opinion.