Why does coughing increase blood pressure?!
Question: The chest is essentially a fixed volume.
When you cough, the diaphragm contracts sharply upwards, expelling air from the lungs. This decreases the pressure in the chest which rapidly fills with air again. This swing in pressure from full lungs, to empty, back to full again takes place over a second.
The heart is sitting right behind the left lung, on top of the diaphragm. It moves with the diaphragm. The pulsatile cough increases interthroacic, and hence intercardiac pressure increasing the blood pressure.
Answers: The chest is essentially a fixed volume.
When you cough, the diaphragm contracts sharply upwards, expelling air from the lungs. This decreases the pressure in the chest which rapidly fills with air again. This swing in pressure from full lungs, to empty, back to full again takes place over a second.
The heart is sitting right behind the left lung, on top of the diaphragm. It moves with the diaphragm. The pulsatile cough increases interthroacic, and hence intercardiac pressure increasing the blood pressure.
wow. didn't know that.