interval /in·ter·val/ (in´ter-val) the space between two objects or parts; the lapse of time between two events.
interval
interval
atrioventricular (AV) interval the time between the start of atrial systole and the start of ventricular systole, equivalent to the P–R interval of electrocardiography.
cardioarterial interval the time between the apex beat and arterial pulsation.
confidence interval an estimated statistical interval for a parameter, giving a range of values that may contain the parameter and the degree of confidence that it is in fact there.
coupling interval the length of time between an ectopic beat and the sinus beat preceding it; in an arrhythmia characterized by such beats, the intervals may be constant (fixed coupling i's) or inconstant (variable coupling i's) .
escape interval the interval between an escape beat and the normal beat preceding it.
interdischarge interval the time between two discharges of the action potential of a single muscle fiber.
interpotential interval the time between discharges of action potentials of two different fibers from the same motor unit.
P–R interval the portion of the electrocardiogram between the onset of the P wave (atrial depolarization) and the QRS complex (ventricular depolarization).
lucid interval
1. a brief period of remission of symptoms in a psychosis.
2. a brief return to consciousness after loss of consciousness in head injury.
pacemaker escape interval the period between the last sensed spontaneous cardiac activity and the first beat stimulated by the artificial pacemaker.
P–P interval the time from the beginning of one P wave to that of the next P wave, representing the length of the cardiac cycle.
QRS interval the interval from the beginning of the Q wave to the termination of the S wave, representing the time for ventricular depolarization.
QRST interval , Q–T interval the time from the beginning of the Q wave to the end of the T wave, representing the duration of ventricular electrical activity.
systolic time intervals (STI) any of several intervals measured for assessing left ventricular performance, particularly left ventricular ejection time, electromechanical systole, and preejection period.
V–A interval the time between a ventricular stimulus and the atrial stimulus following it.
in·ter·val ( n t r-vl)n. 1. A space between two objects, points, or units. 2. The amount of time between two specified instants, events, or states. |
interval
[in′tərval]
Etymology: L, intervallum, space between
a space between things or events, or a break or interruption in an otherwise continuous flow.
interval
the space between two objects or parts; the lapse of time between two events. In statistical terms, the numerical distance between two values.
atrioventricular interval, A-V interval
see P-R interval (below).
cardioarterial interval
the time between the apex beat and arterial pulsation.
P-R interval
in electrocardiography, the time between the onset of the P wave (atrial activity) and the QRS complex (ventricular activity).
QRST interval, Q-T interval
the duration of ventricular electrical activity.
interval
Vox populi A period of time or space between 2 discrete periods or objects. See AH interval, AV interval, Class interval, Confidence interval, Conference interval, Dosing interval, Escape interval, Lucid interval, PA interval, QT
interval, V-A interval.
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