After being rushed to hospital with a heart rate of 300 beats per minute, a reader’s 10-year-old granddaughter was diagnosed with supraventricular tachycardia (SVT).  She has been put on beta-blockers for two years, but the medication is causing terrible mood swings.  Does anyone have any ideas for either the SVT or the mood swings?

“I had a similar condition that I experienced for years,” says one reader.  “I found that by lying down with my head below my feet (on an incline) that I could end the episode.  Also, after the diet ‘The Zone’ came out I gave it a try for weight control. One of the benefits I found was that the tachycardia problem went away entirely.  Perhaps this will work for your granddaughter as well.”

Nevertheless, it maybe best to consult a qualified nutritionist before putting your granddaughter on this diet.