<s>[INST] I fell recently and broke my left 4,5,6 & 7th ribs. About two weeks later I began to experience heart palpitations, mostly after going to bed and then in the night and into the morning. Then, they would cease until the next night. No chest pain, shortness of breath or dizziness. Some days there are no evident palpitations. Could I have bruised my heart or Vegus nerve? [/INST] Hello, I would explain that your symptoms do not seem to be related to a bruised vagus nerve. Anyway, I would recommend performing some tests: - a resting ECG and a cardiac ultrasound-complete blood count for anemia-thyroid hormone levels for thyroid gland dysfunction- blood electrolytes for possible imbalance An ambulatory 24-48 hours ECG monitoring would help examine your heart rhythm trends for a prolonged time and exclude possible cardiac arrhythmia. Hope I have answered your query. Let me know if I can assist you further. Wish you good health.  </s>