Hyperventilation | How Common Is Hyperventilation
What is hyperventilation?
Hyperventilation (or alveolar hyperventilation), since it has the prefix "hyper-", is breathing more air per minute than the medical norm. The values for normal minute ventilation (or respiratory minute volume) at rest for a 70-kg man range from 4-6 L/min for older physiological textbooks and up to 6-9 L/min for some modern textbooks. Obviously, anything that is more 9-10 L/min is defined as "hyperventilation".
Hyperventilation causes hypocapnia (CO2 deficiency) in the alveoli of the lungs and, if there is no ventilation-perfusion mismatch, in the arterial blood and other body cells. In any case (too high or too low arterial CO2 - arterial hypercapnia or hypocapnia), hyperventilation always leads to tissue hypoxia (low oxygen levels in cells).
Official story about hyperventilation
Hyperventilation, as nearly all medical sources imply (e.g., Wikipedia, Emedicine.com, and many others), happens rarely, in such cases as anxiety panic, or other more exotic situations. For example, click here. These medical sources cannot even provide the correct definition of hyperventilation or "hyper" + "ventilation". What do we know about exact numbers for ventilation at rest in people with chronic diseases? Do healthy people have normal minute ventilation rates? How common is hyperventilation? What is the real story related to hyperventilation?
Minute ventilation rates (chronic diseases)
Note that advanced stages of asthma can lead to lung destruction, ventilation-perfusion mismatch,
and arterial hypercapnia causing further reduction in body oxygen levels.
This data explains the pathological changes and high prevalence of chronic disorders (or diseases of civilization), due to hyperventilation, in modern population. Since modern people breathe about 2 times more than the medical norm, they usually suffer from low CO2 values in the arterial blood (ventilation-perfusion mismatch is not a very common condition). Therefore, they need to get managed hosting of their hyperventilation.
Carbon dioxide is a potent dilator of blood vessels (vasodilator) and is crucial for the Bohr effect (O2 transport from red blood cells to tissues). As a result of hyperventilation, modern people experience reduced oxygen levels in the brain, heart, kidneys and all other vital organs. Cell hypoxia causes or favors inflammatory conditions, production of free radicals and suppression of the immune system. Apart from these effects, there are devastating effects of the hyperventilation syndrome on the brain due to hypocapnia or a lack of CO2, which has calming or sedative properties on nerve cells. These and other hyperventilation-related physiological effects promote pathological changes and the advance of chronic health problems, such as cancer, heart disease and diabetes.
Is hyperventilation common in ordinary people?
Chronic hyperventilation is very common for ordinary people (or "normal subjects") these days. Their average minute ventilation values are much greater than the normal value, which used to be the norm about 80-100 years ago.
Minute ventilation (or respiratory minute volume, or flow of air) is the volume of air which can be inhaled (inhaled minute volume) or exhaled during 1 minute. It is used to measure one's degree of hyperventilation.
Prevalence of hyperventilation in the modern population
Technical note. If we consider Wikipedia or some other sources saying 5-8 or 6-8 L/min as a normal range for minute ventilation, then hyper means more than 8 L/min. With numerous studies that found about 12 L/min as an average and bell-shape or Gaussian distribution with standard deviation 2-3 L/min (also common), we know that about 90% will be in the range from 10 to 14 or 9 to 15 L/min. The remaining part will have less than the lower range 9 or 10, or higher than the upper range that 14 or 15 L/min. Therefore, less than 10% of subjects (even less than 5%) are within or less than the norm. We can get the same result even if you assume 6-9 or 5-9 as normal values. These are basics of the theory of probability.
Reference pages: Breathing norms and the DIY body oxygen test:
- Breathing norms: Parameters, graph, and description of the normal breathing pattern
- Body-oxygen test (CP test) : How to measure your own breathing and body oxygenation (two in one) using a simple DIY test
References: pages about CO2 effect:
- Vasodilation: CO2 expands arteries and arterioles facilitating perfusion (or blood supply) to all vital organs
- The Bohr effect: How and why oxygen is released by red blood cells in body tissues
- Nerve stabilization: Carbon dioxide has powerful calmative and sedative effects on brain neurons and nerve cells
You can leave your feedback and comments below. Thanks.