<s>[INST] My husband has dissy spells, somtimes on waking. Today he was gardening and had a sudden attack of dissiness, nausia and vomiting. He says he feels as though he is sea sick. He also complained of a sudden sharp pain in left back of neck. He had open heart surgery in 2004 to replace a bicusbet ascending aortic valve and a portion of damaged aorta. (please excuse spelling). These spells have been more frequent the last two weeks. We saw a new doctor today and he is going to fit him with a heart monitor on Friday. I am worried, could he be having small strokes? Or trouble with blook clotting? [/INST] Hi, I am Chat Doctor. The Symptoms you have described 1. Sudden attack of dizziness, 2. Nausea and 3. Vomiting. 4. feels as though he is sea sick. Indicate a problem in Posterior Fossa of Brain (mostly decreased blood circulation or rarely a space occupying lesion) The sudden sharp pain in left back of neck can be due to Conditions Associated with the above I would suggest you to visit a Neurosurgeon immediately and get evaluated If you need any clarification / have doubts / have additional questions / have follow-up questions, then please do not hesitate in asking again. I will be happy to answer your questions. </s>