Why Do Chf Patients Have Orthopnea?

Orthopnea is caused by increased pressure in the blood vessels of your lungs. When you lie down, blood flows from your legs back to the heart and then to your lungs. In healthy people, this redistribution of blood doesn't cause any problems.

Why does Orthopnea occur with heart failure?

Orthopnea is due to increased distribution of blood to the pulmonary circulation when a person lies flat or closer to a horizontal position. Lying flat decreases the inhibitory effect that the gravity usually has on the blood that is coming back to the heart from the lower extremities of the body.

How is Orthopnea characterized in heart failure?

Orthopnea is an early symptom of heart failure and may be defined as dyspnea that develops in the recumbent position and is relieved with elevation of the head with pillows. As in the case of exertional dyspnea, the change in the number of pillows required is important.