Her breathing was shallow, rapid, erratic, and she was using only the muscles in her neck and upper chest. Her abdomen wasn't moving at all. She was breathing at a rate of 22 breaths per minute, about twice as fast as is considered normal. They don't use their diaphragm when breathing, or only partly use it. They breath rapidly and shallowly, so it is hard to see them breathe unless they sigh or are requested to take a deep breath.
Alkalosis causes the arteries shrink so blood flow is restricted.
Moreover, the oxygen being carried by the corpuscles cannot be transferred to the tissues and organs as it should. Under these circumstances, the oxygen available to the brain can be reduced by 50 percent. At first vision begins to blur. Then people report feeling dizzy, tense, anxious, jittery, nervous. They often feel like crying.