High blood pressure is also known as hypertension and means high pressure caused in the arteries. Arteries as is commonly known are the blood vessels that carry blood after the pumping action of the heart is complete. The blood is circulated to all the tissues and organs of the human body. Emotional tension as well as stress can temporarily be responsible for an increment in blood pressure. Normal blood pressure is usually below 120/80 while a blood pressure rate of 140/90 or even above is considered high.
Formerly medical experts thought that sudden rises in the diastolic blood pressure were a more important risk factor when compared to many systolic elevations. The top number is the systolic blood pressure. This corresponds to the pressure in the human arteries just the way the heart contracts and continously pumps blood into the arteries. The bottom number represents the diastolic pressure which is the pressure in the arteries.