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单词 av interval
释义 DictionarySeeinterval

AV drive


AV drive

(Audio Video drive) In the late 1990s, an AV drive was a hard drive optimized for audio and video applications, which required long, sustained transfers of music and video tracks. AV drives were designed to postpone thermal recalibration so that writing to the disk would not be interrupted while periodic recalibration took place. Today, hard drives use servo calibration to monitor head alignment and have large memory buffers, which together adequately support real-time audio and video transfer.

SuperSpeed USB (USB 3.0)
Because of the much higher transfer rate of SuperSpeed USB, drives that use the USB 3.0 interface are sometimes touted as AV drives (see USB 3.0). See underrun and thermal recalibration.


An AV Drive
Inside or out, an AV drive looks much like any other hard drive. (Image courtesy of Western Digital Corporation.)

AV interval


interval

 [in´ter-val] the space between two objects or parts; the lapse of time between two events.AA interval the interval between two consecutive atrial stimuli.atrioventricular interval (AV interval) 1. P–R interval.2. in pacing" >dual chamber pacing, the length of time between the sensed or paced atrial event and the next sensed or paced ventricular event, measured in milliseconds; called also atrioventricular or AV delay.cardioarterial interval the time between the apical 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 distance between two linked events in the cardiac cycle.His-ventricular (H-V) interval an interval of the electrogram of the bundle of His" >bundle of His, measured from the earliest onset of the His potential to the onset of ventricular activation as recorded on eight of the intracardiac bipolar His bundle leads or any of the multiple surface ECG leads; it reflects conduction time through the system" >His-Purkinje system.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.PA interval the interval from the onset of the P wave on the standard electrocardiogram (or from the atrial deflection on the high right atrial ECG) to the A wave on the His bundle ECG; it represents intra-atrial conduction time.postsphygmic interval the short period (0.08 second) of ventricular diastole, after the period" >sphygmic period, and lasting until the atrioventricular valves open.P–R interval in electrocardiography, the time between the onset of the P wave (atrial activity) and the QRS complex (ventricular activity).presphygmic interval the first phase of ventricular systole, being the period (0.04–0.06 second) immediately after closure of the atrioventricular valves and lasting until the semilunar valves open.QRST interval (Q–T interval) in the electrocardiogram, the length of time between ventricular depolarization (the Q wave) and repolarization (the T wave); it begins with the onset of the QRS complex and ends with the end of the T wave.VA interval [ventricular-atrial interval] the interval between a ventricular stimulus and the succeeding atrial stimulus; it is equal to the interval" >AA interval minus the interval" >atrioventricular interval.

AV in·ter·val

the time from the beginning of atrial systole to the beginning of ventricular systole as measured from pressure pulses or cardiac volume curves in animals, or from the electrocardiogram in humans.

AV in·ter·val

(in'tĕr-văl) The time from the beginning of atrial systole to the beginning of ventricular systole as measured from pressure pulses or cardiac volume curves in animals, or from the electrocardiogram in humans.
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更新时间:2025/2/28 19:31:19