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Hyperventilation syndrome (HVS), also known as chronic hyperventilation syndrome (CHVS), dysfunctional breathing hyperventilation syndrome, cryptotetany, [1] [2] spasmophilia, [3] [4] [5] latent tetany, [4] [5] and central neuronal hyper excitability syndrome (NHS), [3] is a respiratory disorder, psychologically or physiologically based, involving breathing too deeply or too rapidly ...
For the clinical diagnosis of CNH, it is essential that the symptoms, particularly respiratory alkalosis, persist while the patient is both awake and asleep. The presence of hyperventilation during sleep excludes any possible emotional or psychogenic causes for the sustained hyperventilation. [8]
This explains the other common symptoms of hyperventilation—pins and needles, muscle cramps and tetany in the extremities, especially hands and feet. [ citation needed ] Because the brain stem regulates breathing by monitoring the level of blood CO 2 instead of O 2 , hypocapnia can suppress breathing to the point of blackout from cerebral ...
The exact prevalence of obesity hypoventilation syndrome is unknown, and it is thought that many people with symptoms of OHS have not been diagnosed. [4] About a third of all people with morbid obesity (a body mass index exceeding 40 kg/m 2) have elevated carbon dioxide levels in the blood. [5]
Sepsis, encephalitis, neuroleptic malignant syndrome, [8] malignant hyperthermia, [8] lethal catatonia, spinal cord injury (not associated with PSH), seizures, and hydrocephalus (this can be associated with PSH) are examples of diagnoses that should be considered due to the manifestation of similar symptoms before confirming a diagnosis of PSH. [3]
Factors that may induce or sustain [2] hyperventilation include: physiological stress, anxiety or panic disorder, high altitude, head injury, stroke, respiratory disorders such as asthma, pneumonia, or hyperventilation syndrome, [5] cardiovascular problems such as pulmonary embolisms, anemia, an incorrectly calibrated medical respirator, [1] [3 ...
Celine Dion took to the stage for the first time since revealing her stiff-person syndrome diagnosis in September 2022. Wearing a white gown, with the rain beating down and the Eiffel Tower in the ...
[3] [4] This sign may also be observed as a symptom of hyperventilation syndrome as a result of hypocapnia-induced reduction of calcium levels in the blood. [5] To elicit the sign, a blood pressure cuff is placed around the arm and inflated to a pressure greater than the systolic blood pressure and held in place for 3 minutes.