Even if your blood pressure (BP) is slightly elevated you may be prone to a stroke research says. Prehypertension is a clinical category to describe patients whose BP is elevated but still considered within normal range. People with prehypertension have a 55 percent higher chance of experiencing a stroke than people without it University of California School of Medicine noted. That hypertension or abnormally high BP is a major risk for cardiovascular diseases and strokes is well-known but much less is known about the dangers of prehypertension the journal Neurology reports. A stroke is a condition where a blood clot