There are two numbers given by doctors when testing blood pressure; examples 12-8 so that the first represents the first blood pressure and the second is the next pressure which is slightly lower. If the first blood pressure is less than (<9), this will indicate low blood pressure. Symptoms: In addition to having to be tested with a special device, the person may feel tired or have dizziness, wheezing or tingling in the ears, may lead to fainting and loss of consciousness, blurred vision, dizziness suddenly standing up ...