The pressure valve is a valve that opens when you squeeze on it and the pressure inside it rises as the valve closes.
It allows air to escape from your lungs and allows the air in your body to expand.
The pressure is released when you breathe normally.
If the valve is closed, the pressure is too high and your lungs can’t handle the pressure.
If you’re having a stroke, for example, you might not be able to breathe normally if the valve doesn’t close.
To help you understand how your heart is working and what’s happening to your lungs, we spoke to Dr. Scott Wintrich, director of cardiac rehabilitation at Vanderbilt University Medical Center, to find out the best time to fill your valve.