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  2. Hyperventilation syndrome - Wikipedia

    en.wikipedia.org/wiki/Hyperventilation_syndrome

    The hyperventilation is self-promulgating as rapid or deep breathing causes carbon dioxide levels to fall below healthy levels, and respiratory alkalosis (high blood pH) develops. This makes the symptoms worse, which causes the person to breathe even faster, which then, further exacerbates the problem. The respiratory alkalosis leads to changes ...

  3. Shortness of breath - Wikipedia

    en.wikipedia.org/wiki/Shortness_of_breath

    Shortness of breath (SOB), known as dyspnea (in AmE) or dyspnoea (in BrE), is an uncomfortable feeling of not being able to breathe well enough. The American Thoracic Society defines it as "a subjective experience of breathing discomfort that consists of qualitatively distinct sensations that vary in intensity", and recommends evaluating dyspnea by assessing the intensity of its distinct ...

  4. Panic attack - Wikipedia

    en.wikipedia.org/wiki/Panic_attack

    Panic attack. Panic attacks are sudden periods of intense fear and discomfort that may include palpitations, sweating, chest pain or chest discomfort, shortness of breath, trembling, dizziness, numbness, confusion, or a feeling of impending doom or of losing control. [1][2][7] Typically, symptoms reach a peak within ten minutes of onset, and ...

  5. Hyperventilation - Wikipedia

    en.wikipedia.org/wiki/Hyperventilation

    Hyperventilation is irregular breathing that occurs when the rate or tidal volume of breathing eliminates more carbon dioxide than the body can produce. [1][2][3] This leads to hypocapnia, a reduced concentration of carbon dioxide dissolved in the blood. The body normally attempts to compensate for this homeostatically, but if this fails or is ...

  6. Hypocapnia - Wikipedia

    en.wikipedia.org/wiki/Hypocapnia

    Hypocapnia (from the Greek words ὑπό meaning below normal and καπνός kapnós meaning smoke), also known as hypocarbia, sometimes incorrectly called acapnia, is a state of reduced carbon dioxide in the blood. [1] Hypocapnia usually results from deep or rapid breathing, known as hyperventilation. Hypocapnia is the opposite of hypercapnia.

  7. Syncope (medicine) - Wikipedia

    en.wikipedia.org/wiki/Syncope_(medicine)

    Syncope, commonly known as fainting or passing out, is a loss of consciousness and muscle strength characterized by a fast onset, short duration, and spontaneous recovery. [ 1 ] It is caused by a decrease in blood flow to the brain, typically from low blood pressure. [ 1 ]

  8. Reflex syncope - Wikipedia

    en.wikipedia.org/wiki/Reflex_syncope

    Reflex syncope. Reflex syncope is a brief loss of consciousness due to a neurologically induced drop in blood pressure and/or a decrease in heart rate. [5][6][7][8][9][10][2] Before an affected person passes out, there may be sweating, a decreased ability to see, or ringing in the ears. [1] Occasionally, the person may twitch while unconscious. [1]

  9. Central neurogenic hyperventilation - Wikipedia

    en.wikipedia.org/wiki/Central_neurogenic...

    Central neurogenic hyperventilation (CNH) is an abnormal pattern of breathing characterized by deep and rapid breaths at a rate of at least 25 breaths per minute. Increasing irregularity of this respiratory rate generally is a sign that the patient will enter into coma. CNH is unrelated to other forms of hyperventilation, like Kussmaul's ...