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High blood pressure, hypertension (HTN) or arterial hypertension is a chronic medical condition in which the blood pressure in the arteries is high. As a result of this increased pressure, the heart has to work harder than normal to circulate blood through the vessels. Blood pressure consists of two measurements, systolic and diastolic, which are related to the contraction (systole) and relaxation (diastole) of the heart muscle between heartbeats. Normal blood pressure at rest is between 100–140 mmHg (highest point) for systolic blood pressure and 60–90 mmHg (lowest point) for diastolic blood pressure. High blood pressure is when blood pressure is consistently at or above 140/90 mmHg. To watch the lesson videos sorted by topic, visit our website: https://tr.khanacademy.org Subscribe to our channel to be the first to watch our latest educational content every day: https://www.youtube.com/khanacademytu... On Khan Academy, the world's largest free learning platform benefiting 140+ million students in 52 languages, you can access thousands of lesson videos, topic explanations, question solutions, interactive exercises and more for all ages, from mathematics to art history, economics to science, simple addition to differential equations, primary school to university level, completely free of charge and without ads. You Should Know Only One Thing: #YouCanLearnEverything * * Khan Academy Turkish World-class and free education for everyone, everywhere, for equal opportunities in education. / khanacademyturkce / khanacademyturkce / khanacademyturkce / khanacademyturkce / khanacademytr https://tr.khanacademy.org https://khanacademy.org.tr #KhanAcademyTurkish #health #KhanAcademy #OnlineEğitim #School #Course #Education * * For Khan Academy's courses in English and other languages: https://www.khanacademy.org High blood pressure: http://www.khanacademy.org/video?v=yd...