Are blood pressure readings juggling with your health?

A letter to the Times in response to the announcment that blood presure measurements need to be performed differently to get more accurate readings.

Sir, when my doctor identified my hypertension, he warned of white coat syndrome whereby the very visit to the doctor can cause anxiety and push up blood pressure. He provided me with a device to be worn under my shirt for 24 hours, which automatically took and recorded blood pressure readings at random intervals. It is surprising that it has taken National Institure for Clinacal Excellence so long to catch up.