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Central alpha agonists lower blood pressure by stimulating alpha-receptors in the brain which open peripheral arteries easing blood flow. These alpha 2 receptors are known as autoreceptors which provide negative feedback in neurotransmission (in this case, the vasoconstriction effects of adrenaline).
For most people, recommendations are to reduce blood pressure to less than or equal to somewhere between 140/90 mmHg and 160/100 mmHg. [2] In general, for people with elevated blood pressure, attempting to achieve lower levels of blood pressure than the recommended 140/90 mmHg will create more harm than benefits, [3] in particular for older people. [4]
The narrowing of blood vessels leads to an increase in peripheral resistance, thereby elevating blood pressure. While vasoconstriction is a normal and essential regulatory mechanism for maintaining blood pressure and redistributing blood flow during various physiological processes, its dysregulation can contribute to pathological conditions.
Arterial occlusion is a condition involving partial or complete blockage of blood flow through an artery. Arteries are blood vessels that carry oxygenated blood to body tissues. [1] [2] An occlusion of arteries disrupts oxygen and blood supply to tissues, leading to ischemia. [1]
Instead of using drugs to lower blood pressure, doctors use radiofrequency waves to heat and destroy nerves located in arteries near the kidneys. In patients like Davis, these nerves become ...
Phenylephrine, sold under the brand names Neosynephrine and Sudafed PE among others, is a medication used as a decongestant for uncomplicated nasal congestion in the form of a nasal spray or oral tablet, [5] to dilate the pupil, to increase blood pressure given intravenously in cases of low blood pressure, and to relieve hemorrhoids as a suppository.
The small blood vessels form a natural bypass of the blockage, but often do not supply enough blood to meet an increased demand when stressors are applied like exercise. [8] When a plaque has a greater than 50% diameter stenosis, the reduced blood flow through the coronary artery during exertion may lead to angina. [10] Acute coronary events ...
Several evidence-based natural remedies can help relieve chest congestion, says Joseph Mercola, D.O., board-certified family medicine osteopathic physician and author of Your Guide to Cellular ...
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