Low Blood Pressure Glossary of Terms

The following are health and medical definitions of terms that appear in the Low Blood Pressure article.

Abdomen: The belly, that part of the body that contains all of the structures between the...

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Abnormal: Outside the expected norm, or uncharacteristic of a particular patient.

Acetylcholine: A neurotransmitter released by nerves that is essential for communication b...

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Acute: Of abrupt onset, in reference to a disease. Acute often also connotes an illness th...

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Adrenal gland: A small gland located on top of the kidney. The adrenal glands produce horm...

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Adrenaline: A stress hormone produced within the adrenal gland that quickens the heart bea...

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Allergic reaction: The hypersensitive response of the immune system of an allergic indiv...

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Artery: A vessel that carries blood high in oxygen content away from the heart to the far...

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Autonomic nervous system: A part of the nervous system that regulates key involuntary func...

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Blood pressure: The blood pressure is the pressure of the blood within the arteries. It is...

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Blood sugar: Blood glucose. See also: High blood sugar; Low blood sugar.

Blood transfusion: The transfer of blood or blood components from one person (the donor) i...

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Bowel: The small and large intestine.

Brain: The portion of the central nervous system that is located within the skull. It func...

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Calcium: A mineral found mainly in the hard part of bones, where it is stored. Calcium is ...

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Chest: The area of the body located between the neck and the abdomen. The chest contains t...

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Chest pain: Pain in the chest that can be a result of many things, including angina, heart...

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Cortisone: A naturally occurring adrenocorticoid hormone that is produced in minute amount...

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Dehydration: Excessive loss of body water. Diseases of the gastrointestinal tract that cau...

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Diabetes: Usually refers to diabetes mellitus or, less often, to diabetes insipidus. Diabe...

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Diagnosis: 1 The nature of a disease; the identification of an illness. 2 A ...

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Diarrhea: A common condition that involves unusually frequent and liquid bowel movements. ...

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Diastole: The time period when the heart is in a state of relaxation and dilatation (expan...

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Dilate: To stretch or enlarge. Also known as dilatate.

Dilating: The widening and opening of an opening, such as the cervix or esophagus. For exa...

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Dilation: The process of enlargement, stretching, or expansion. The word "dilatation" mean...

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Diuretic: Something that promotes the formation of urine by the kidney. All diuretics caus...

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Dysfunction: Difficult function or abnormal function.

ECG: Electrocardiogram.

Electrocardiogram: A recording of the electrical activity of the heart. Abbreviated ECG an...

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Emergency department: The department of a hospital responsible for the provision of medica...

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Endocrine: Pertaining to hormones and the glands that make and secrete them into the blood...

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Epinephrine: Also known as adrenaline. A substance produced by the medulla inside of the a...

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Feedback: In order to maintain a stable internal environment, or homeostasis, the body use...

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Gland: A group of cells that secrete a substance for use in the body. For example, the thy...

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Heart: The muscle that pumps blood received from veins into arteries throughout the body. ...

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Heart attack: The death of heart muscle due to the loss of blood supply. The loss of bloo...

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Heart muscle: A type of muscle with unique features only found in the heart. The heart mus...

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High blood pressure: A repeatedly elevated blood pressure exceeding 140 over 90 mmHg. Chro...

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Hives: A raised, itchy area of skin that may be a sign of an allergic reaction. It can be ...

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Hormone: A chemical substance produced in the body that controls and regulates the activit...

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Hyperglycemia: A high blood sugar. An elevated level specifically of the sugar glucose in...

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Hypotension: Any blood pressure that is below the normal expected for an individual in a ...

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Hypothyroid: Deficiency of thyroid hormone which is normally made by the thyroid gland wh...

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Infarction: The formation of an infarct, an area of tissue death, due to a local lack of o...

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Infection: The invasion and multiplication of microorganisms such as bacteria, viruses, an...

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Intervention: The act of intervening, interfering or interceding with the intent of modify...

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Intestine: The long, tubelike organ in the abdomen that completes the process of digestion...

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Ischemia: Inadequate blood supply to a local area due to blockage of blood vessels leading...

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Kidney: One of a pair of organs located in the right and left side of the abdomen. The kid...

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Large intestine: Comes after the small intestine. Large because it is wider than the smal...

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Low blood pressure: Any blood pressure that is below the normal expected for an individua...

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Lungs: The lungs are a pair of breathing organs located with the chest which remove carbon...

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Micturition: Urination; the act of urinating.

Micturition syncope: The temporary loss of consciousness upon urinating. (Syncope is the ...

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Muscle: Muscle is the tissue of the body which primarily functions as a source of power. T...

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Myocardial infarction: A heart attack. Abbreviated MI.

Neck: The part of the body joining the head to the shoulders. Also, any narrow or constric...

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Nerve: A bundle of fibers that uses electrical and chemical signals to transmit sensory an...

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Operation: In medicine, a surgical procedure. Many operations are named after persons. The...

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Organ: A relatively independent part of the body that carries out one or more special func...

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Orthostatic hypotension: A temporary lowering of blood pressure, usually related to sudden...

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Oxygen: The odorless gas that is present in the air and necessary to maintain life. Oxygen...

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Pain: An unpleasant sensation that can range from mild, localized discomfort to agony. Pa...

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Physiologic: Something that is normal, that is due neither to anything pathologic nor sign...

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Pituitary: 1. As an adjective, pertaining to the pituitary gland or its hormonal se...

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Pituitary gland: The main endocrine gland. It is a small structure in the head. It is ca...

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Pneumonia: Inflammation of one or both lungs, with dense areas of lung inflammation. Pneum...

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Postural: Pertaining to the posture or position of the body, the attitude or carriage of t...

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Pregnancy: The state of carrying a developing embryo or fetus within the female body. Thi...

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Pregnant: The state of carrying a developing fetus within the body.

Pulse: The rhythmic dilation of an artery that results from beating of the heart. Pulse is...

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Red blood cells: The blood cells that carry oxygen. Red cells contain hemoglobin and it is...

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Serum: The clear liquid that can be separated from clotted blood. Serum differs from plas...

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Shock: In medicine, a critical condition that is brought on by a sudden drop in blood flow...

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Shortness of breath: Difficulty in breathing. Medically referred to as dyspnea. Shortness ...

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Spine: 1) The column of bone known as the vertebral column, which surrounds and protects ...

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Stenotic: Narrowed, as in a stenotic artery. From the Greek "stenos" meaning narrow.

Stroke: The sudden death of brain cells due to lack of oxygen, caused by blockage of blood...

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Sympathetic nervous system: A part of the nervous system that serves to accelerate the hea...

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Symptom: Any subjective evidence of disease. In contrast, a sign is objective. Blood comin...

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Symptomatic: 1 With symptoms, as a symptomatic infection. 2 Characteristic o...

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Syncope: Partial or complete loss of consciousness with interruption of awareness of one...

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Systole: The time period when the heart is contracting. The period specifically during whi...

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Systolic: The blood pressure when the heart is contracting. It is specifically the maximum...

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Tension: 1) The pressure within a vessel, such as blood pressure: the pressure within t...

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Therapy: The treatment of disease. Therapy is synonymous with treatment.

Thyroid: 1. The thyroid gland. Also, pertaining to the thyroid gland. 2. A p...

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Thyroid gland: A gland that makes and stores hormones that help regulate the heart rate, b...

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Transfusion: The transfer of blood or blood products from one person (the donor) into the ...

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Tubes: The "tubes" are medically known as the Fallopian tubes. There are two Fallopian tub...

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Urinary: Having to do with the function or anatomy of the kidneys, ureters, bladder, or ur...

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Urinary tract: The organs of the body that produce, store, and discharge urine. These orga...

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Urine: Liquid waste produced by the kidneys. Urine is a clear, transparent fluid that norm...

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Vagus nerve: A nerve that supplies nerve fibers to the pharynx (throat), larynx (voice box...

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Vasovagal syncope: The temporary loss of consciousness in a particular kind of situation ...

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Vessel: A tube in the body that carries fluids. Examples of vessels are blood vessels and ...

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Vital: Necessary to maintain life. For example, breathing is a vital function.

Wheezing: A whistling noise in the chest during breathing. Wheezing occurs when the airway...

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