![]() What are the complications of elevated diastolic pressure? Renovascular hypertension, due to narrowing of the main artery leading to the kidneys, is another possible cause of IDH. Most diseases that damage the kidney can lead to IDH by reducing the ability of the kidneys to remove fluids from the body or by increasing the production of angiotensin. Endocrine diseases producing high levels of aldosterone, parathyroid hormone, or corticosteroids can also cause IDH. Hypothyroidism may be suspected in a person with weight gain, fatigue, and intolerance to the cold, but blood tests are required to confirm the diagnosis. As in primary hypertension, the elevated diastolic pressure is the result of excessive arteriolar narrowing. What are the causes of high diastolic blood pressure?Īn underactive thyroid, or hypothyroidism, is one of the more common secondary causes of IDH. Unusually high levels of certain substances that raise blood pressure, such as angiotensin, or inappropriate contraction of tiny muscles in the arteriole walls are two possible reasons. In IDH caused by primary hypertension, the underlying reason for the arteriolar narrowing is poorly understood. ![]() This compresses the blood flowing through the arterioles, thus raising the pressure. In IDH, the diastolic pressure is generally elevated because tiny arteries, called arterioles, in the body are narrower than usual. ![]() What is high diastolic blood pressure?ĭiastolic pressure is the force exerted by the blood on the walls of arteries as it flows through these blood vessels between heartbeats. Diastolic Blood Pressure, the second number, is the pressure when the heart relaxes between beats. Systolic pressure is the first number of a blood pressure measurement and reflects the pressure inside arteries when the heart pumps. Lood pressure has two components, systolic and diastolic pressure.
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