R R interval alternates RR间期交替
contour r interval 等高距 ; 等高线间隔
r-r interval time rr间期
short p r interval 短pr间期综合征
R-S1 interval S1间期
Objective to evaluate clinical significance of atrial fibrillation with long R-R interval on Holter monitoring in the elderly patients.
目的探讨老年心房颤动伴动态心电图长r - R间隔的临床意义。
In monitor of the chief systems of experimental cattle, only bradycadia, mild imbalance of acid-base and prolonged P-R interval of ECG were found.
对实验牛心血管系统、呼吸系统，肝肾系统和血液指标监测，仅见心率减慢、轻度酸碱平衡紊乱以及ECG的P—R间期延长，其他指标均无明显变化。
Objective To study structure of the unstable periodic orbits (UPOs) of R-R interval signals of heart during orthostatic standing, and to reveal the dynamic characters of heart rate variability (HRV).
目的研究立位心脏R- R间期信号的非稳定周期轨道的结构，进一步探讨心率变异（HRV）的动力学特征。
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