RRI：R～R间期
“R to R interval”在医学和生理学领域常缩写为RRI，以方便快速记录和日常使用。该术语主要用于描述心电图中相邻两个R波之间的时间间隔，通常被译为“R～R间期”，用以评估心率的变异性及心脏节律的稳定性。
R to R interval的英文发音
例句
- This study purposes to explore electrophysiological mechanism of short P _ R interval syndrome with supraventricular tachycardia. Authors carried out electrophysiological studies in 7 patients with short P _ R interval syndrome and supraventricular tachycardia.
- 为探讨短PR综合征合并室上性心动过速的电生理机制，对7例短PR综合征合并室上性心动过速的患者进行心内电生理检查。
- The maximum velocity V in blasting vibration is a random variable, it has no definite function relation to Q and R in general meaning. So V only can be controlled in a confidence interval.
- 阐述了爆破地震波的质点最大振速V是一个随机变量，它与Q、R没有一般意义上确定的函数关系，因此振动只能控制在某一区间。
- Proposes mean and range control charts with variable sample size and sampling interval time to signal for x and R charts and combined x and R charts.
- 根据Costa（1998）在固定时间抽样的可变样本容量和抽样区间（VSSIFT）控制图[1]模型，研究了x图的制定方法，并设计R图和联合x-R图。
- Several methods including vitrinite reflectance ( R_o ), interval transit time and apatite fission track, are used to reconstruct the sedimentary thickness of Middle-Lower Triassic, and to plot the isopach map of the proto - type basin.
- 应用镜质体反射率（Ro）法、声波时差法及磷灰石裂变径迹法等多种方法恢复了中下三叠统的沉积厚度，编制了原型盆地沉积等厚图。
- Then simulation analyzes the relation be-tween theR ( S / N ) ratio of the DRM system and channel delay (τ) as well as the gain of multi-path ()ρ, proving that appropriate guard interval has great immunity to the ISI.
- 同时仿真分析了DRM系统的信噪比R（S/N）与信道时延τ和路径增益ρ之间的关系，证明了采用合适的保护间隔可以有效的克服符号间干扰ISI。
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