P–r interval Health Dictionary

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P–r Interval: From 1 Different Sources

the interval on an *electrocardiogram between the onset of atrial activity and ventricular activity. It represents the time required for the impulse from the *sinoatrial node to reach the ventricles.
Health Source: Oxford | Concise Colour Medical Dictionary
Author: Jonathan Law, Elizabeth Martin

Confidence Interval

A range of values for a variable of interest, e.g. a rate, constructed so that this range has a specified probability of including the true value of the variable. The specified probability is called the confidence level, and the end points of the confidence interval are called the confidence limits.... confidence interval

Lucid Interval

A temporary restoration of consciousness after a person has been rendered unconscious from a blow to the head. The victim subsequently relapses into COMA. This is a sign of raised INTRACRANIAL PRESSURE from arterial bleeding and indicates that surgery may be required to control the intracranial haemorrhage. (See also GLASGOW COMA SCALE.)... lucid interval

Q-t Interval

The interval in an ELECTROCARDIOGRAM (ECG) that registers the electrical activity generated during ventricular contraction of the HEART.... q-t interval

Class Interval

The difference between the lower and upper limits of a class.... class interval

Interval

Time between paroxysms in malaria.... interval

Interval Scale

See “measurement scale”.... interval scale

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