Abstract：ObjectiveTo determine the special functions of cardiac pacemaker by observing the morphological characteristics of its timeRR scatterplot.
MethodsA total of 128 patients implanted with pacemakers were classified into four groups according to special functions of cardiac pacemakers: group A
(without special function), group B(frequency lagging behind function), group C(with sick sinus syndrome or atrial fibrillation complicating VVI pacemakers
frequency adapting to function) and group D(with sleeping function). The morphological characteristics of timeRR scatterplot were observed in each group.
ResultsPatients in the four groups shared the following features: (ⅰ) when pacing rhythm covered 24 hours, timeRR scatterplot appeared as narrow and
compact “line”; (ⅱ) when pacing rhythm partly covered 24 hours, an obvious “boundary line” below 1.2 s showed at the upper edge of timeRR scatterplot
while the lower edge formed a “punctate or cloudlike” bar chart. The timeRR scatterplot of each group had its own characteristics: in group A, it was a
straight line or “boundary line”; in group B, it was separated into three layer—compact middle layer, straight linear upper layer and lower layer with
fluctuating scatter belt; in group C, it was a line or “boundary line” varying in height and disobeying any changing law; in group D, it appeared as a
straight line in the day while it was “laddershaped” at night. ConclusionThe morphological characteristics of timeRR scatterplot vary among pacemakers
with different special functions and the characteristics help to make quick judgment of pacemakers special functions. It provides a new method and
reference for primary medical staffs to judge the special functions of pacemakers quickly and accurately.
张芳芳, 李世锋, 潘运萍, 李中健. 不同特殊功能起搏器的时间散点图特征及意义[J]. 实用心电学杂志, 2018, 27(1): 33-37.
ZHANG Fang-Fang, LI Shi-Feng, PAN Yun-Ping, LI Zhong-Jian. Characteristics and significance of timeRR scatterplot of cardiac pacemaker with different special functions. JOURNAL OF PRACTICAL ELECTROCARDIOLOGY, 2018, 27(1): 33-37.
2018, Vol. 27 
