What is the difference between vasodilation and venodilation

The accompanying vasoconstriction can lead to an increase in blood pressure as well as buildup of fluid in tissues such as the lungs. This condition is called high-altitude pulmonary edema and can be life-threatening.

The condition may be treated with vasodilator drugs or supplemental oxygen. Increasing age is associated with a decrease in function of blood vessels, including vasodilation. This can contribute to the risk of cardiovascular events such as heart disease and stroke. In an obese individual, blood vessels are more resistant to vasodilation, which can lead to cardiovascular issues. Weight loss can help to alleviate the dysfunction in vasodilation.

Vasodilator drugs are medications that can cause vasodilation. Many can act directly on the smooth muscle found in the walls of blood vessels. Others can act on the part of the nervous system that regulates vasodilation and vasoconstriction. Because vasodilation lowers blood pressure, doctors often prescribe vasodilators for conditions such as high blood pressure or heart failure.

Some vasodilators are strong medications and can cause side effects such as fast heartbeat, fluid retention, and flushing. It helps treat erectile dysfunction by affecting the biological pathways that lead to vasodilation of the smooth muscle. This leads to an increase in blood flow to the penis. A secondary use for Viagra is treating some forms of high blood pressure. Vasoconstriction is the opposite of vasodilation.

While vasodilation is the widening of your blood vessels, vasoconstriction is the narrowing of blood vessels. Your blood pressure also rises. Vasodilation occurs naturally in your body in response to triggers such as low oxygen levels, a decrease in available nutrients, and increases in temperature. It causes the widening of your blood vessels, which in turn increases blood flow and lowers blood pressure.

Although vasodilation is a natural process, there are situations in which it can be harmful, such as in severe hypotension, allergic reactions, and strong inflammatory responses. Nonetheless, inducing vasodilation can be a valuable tool to treat conditions such as high blood pressure and even sickness related to high altitude.

Learn what your blood pressure reading means. The endogenous substances and drugs are able to cause vasodilation are known as vasodilators. Dilation of arteries and arterioles has a significant therapeutic value in decreasing arterial blood pressure and heart rate. Hence, chemical arterial dilators are commonly used to treat heart failure , systemic and pulmonary hypertension and angina.

Vasodilation refers to the widening of blood vessels while vasoconstriction refers to the narrowing of blood vessels. This is the main difference between vasoconstriction and vasodilation.

These two processes affect the blood pressure and blood flow. During vasoconstriction, smooth muscles of the blood vessel walls constrict by reducing the internal diameter of the vessel. In oppose to that, vasodilation relaxes the smooth muscles of the blood vessel walls by increasing the internal diameter of the vessel.

You can download PDF version of this article and use it for offline purposes as per citation notes. Wikimedia Foundation, 10 July Available here. Samanthi Udayangani holds a B. Degree in Plant Science, M. Your email address will not be published. Figure Vasoconstriction. Figure Vasodilation.

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