Category: H
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Hinge or ginglymus joint
Involves two articular surfaces that restrict movement primarily to one axis. Example: elbow, knee, ankle.
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Heat stroke
Overexposure to heat combined with inadequate rehydration can cause heat stroke, which is a medical emergency. The symptoms are hot, dry, very red skin; generally no perspiration; rapid and strong pulse; labored breathing; loss of consciousness. Acute medical emergency characterized by rectal temperature at 105° or higher and no sweating, caused by failure of the…
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Heat exhaustion
Overexposure to heat combined with inadequate rehydration can cause heat exhaustion. The symptoms are pale, clammy skin; profuse sweating; dizziness; weak, rapid pulse; shallow breathing; nausea; headache; and loss of consciousness. The collapse of an individual, characterized by prolonged sweating and inadequate replacement of salt and fluid without failure of the body’s heat regulating system.…
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Heat cramps
Overexposure to heat combined with inadequate rehydration can cause muscle cramping (calf cramping is common). A painful condition resulting in involuntary muscle contractions due to loss of body fluids and electrolytes during heavy exercise. Cramp produced by loss of salt from the body in very hot conditions. A condition caused by prolonged activity in high…
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Heart rate reserve (HRR)
Maximal heart rate minus resting heart rate. The difference between your maximal and resting heart rates. Difference between the maximum heart rate and the resting heart rate.
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Heart rate
The number of times the heart beats or completes a cardiac cycle in one minute. The number of cardiac cycles per minute. The number of times per minute that the heart fills with blood and then pumps the blood into the vascular system. The number of times the heart beats per minute. Number of heart…
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Heart murmur
An abnormal or extra heart sound caused by the malfunctioning of a heart valve. The sound caused when a stream of blood rushes through a heart valve which has been scarred during an inflammation of the heart and its valves. An unusual sound made by turbulent blood flow, sometimes as a result of valve disease.…
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Heart attack
Medically known as myocardial infarction, in which a section of the heart dies because of lack of blood supply. Damage (tissue death) of the heart muscle due to blockage of a coronary artery by either an embolus or thrombus. Obstruction of the coronary arteries depriving the heart of blood and oxygen. A condition in which…
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Health history
A process conducted using a questionnaire or interview to collect information about a participant and determine any health risks. A record of the health history of a person. Generally, conducted in a school setting, but private physicians also obtain of their patients.
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Head injury
Result from a blow to the head producing a concussion, skull fracture, or contusion that may affect normal functioning (e.g., consciousness, motor ability, sensation, intelligence, or emotion). Damage to the head as a result of a fall or other accident, assault, or wound, the main concern being whether the brain is affected. The brain is…