Health A-Z


Clinical Definition Hypertension is elevated pressure or tension on the arterial walls during systemic circulation. Increased force on the arterial walls can occur during the contractions of the myocardium, which is known as systolic pressure, and/or during rest, which is diastolic pressure. Although hypertension can be transient, a diagnosis of hypertension usually refers to a


Clinical Definition Hyperthyroidism is a endocrine-based condition that occurs when your level of thyroid hormones, T3 and T4, are above normal, and your thyroid-stimulating hormone (TSH) is low. In Our Own Words Located in the lower part of your neck, your thyroid gland produces hormones that regulate your body temperature and control your heart rate


Clinical Definition Hyperventilation is an increase in alveolar ventilation. It can lead to hypocapnia if carbon dioxide is removed from the blood in excess of production. Hyperventilation may be caused by physical or emotional stimuli. In Our Own Words Hyperventilation is increased breathing, which may lead to low levels of carbon dioxide in the body.


Clinical Definition Hypogammaglobulinemia is a decreased level of immunoglobulins (i.e., antibodies). Because of the decrease in disease-fighting immunoglobulins, hypogammaglobulinemia can cause an increased susceptibility to certain diseases and infections. Although its etiology is not always known, it may be present from birth or acquired later in life. In Our Own Words Hypogammaglobulinemia is a condition


Clinical Definition A hysterectomy is a surgical operation to remove the uterus and possibly other reproductive organs, such as the ovaries and/or fallopian tubes. In Our Own Words There are many reasons why women undergo a hysterectomy to remove the uterus, and possibly other reproductive organs. Medical reasons may include severe endometriosis and uterine fibroids,

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