I am a 35yr old female who also farms. I have 'spells' like that often and have been to the cardiologist for all kinds of tests that show nothing. My heart rate is usually very low and my blood pressure runs about 96/62. Lowest recording was 89/58. They say its a 'vagal' thing, nothing they can do. They would give me a beta-blocker if my blood pressure would be normal but, the beta-blockers would only make the fainting worse because of my blood pressure. I just depend on the Lord getting me through each day and keeping my rice farm going year after year. I've never had a spell while driving and usually know I'm going pass out because of the sudden panic feeling of nausea and diarrhea, which I never get either of during a spell. Anyway, hope you have a great year in the fields!