How the heart pumps blood into the arteries with enough force to push blood to the far reaches of each organ from the top of the head to the bottom of the feet. Blood pressure can be defined as the pressure of blood on the walls of the arteries as it circulates through the body. Blood pressure is highest as its leaves the heart through the aorta and gradually decreases as it enters smaller and smaller blood vessels (arteries, arterioles, and capillaries). Blood returns in the veins leading to the heart, aided by gravity and muscle contraction.
Quitting smoking. Visit Smoking and Your Heart and the National Heart, Lung, and Blood Institute’s Your Guide to a Healthy Heart [PDF – 2MB]. Although these resources focus on heart health, they include basic information about how to quit smoking. For free help and support to quit smoking, you can call the National Cancer Institute’s Smoking Quitline at 1-877-44U-QUIT (1-877-448-7848).
Hispanic Community Health Study/Study of Latinos (HCHS/SOL). The NHLBI supports the HCHS/SOL, which is the most comprehensive long-term study of health and disease in Hispanics and Latinos living in the United States. Study data will pave the way for future research into possible causes of health disparities among Hispanic and Latino communities. Visit Hispanic Community Health Study/Study of Latinos for more information.
^ Xie, X; Atkins, E; Lv, J; Bennett, A; Neal, B; Ninomiya, T; Woodward, M; MacMahon, S; Turnbull, F; Hillis, GS; Chalmers, J; Mant, J; Salam, A; Rahimi, K; Perkovic, V; Rodgers, A (30 January 2016). "Effects of intensive blood pressure lowering on cardiovascular and renal outcomes: updated systematic review and meta-analysis". Lancet. 387 (10017): 435–43. doi:10.1016/S0140-6736(15)00805-3. PMID 26559744.

Unlike high blood pressure symptoms, which are poorly defined and often totally absent, low blood pressure symptoms tend to be more upfront and easily recognizable. The development of symptoms is often a warning sign of a potentially serious underlying disorder. Generally speaking, your blood pressure would need to fall pretty dramatically before symptoms develop.
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