Lorenz-RR scatter plot has an obvious shortcoming in that it does not indicate the time when the scatter point happens.On the Lorenz RR scatter plot,one cannot know the time during which the cardiac rhythms take place...Lorenz-RR scatter plot has an obvious shortcoming in that it does not indicate the time when the scatter point happens.On the Lorenz RR scatter plot,one cannot know the time during which the cardiac rhythms take place.Since occurrence of cardiac rhythms is time-related,time should be introduced to such plots.In this study,time was used as abscissa and RR interval(the time interval between the previous RR wave and the R wave)as the ordinate and time was compressed into a visually observable length,and thereby a timed RR-interval scatter plot,or t-RR scatter plot,for short,was developed.On t-RR scatter plot,the patterns were band-shaped or were of linear type.On the t-RR plot,the sinus rhythm presented bands of various widths,with the spiculate or burred upper and lower boundaries,having diurnal variation.Premature beats showed separate layers(“stratification”),the layer number corresponding the number of RR-intervals.With simple premature beats,the layers were clearly separated.With parasystole rhythm,the upper and lower bands or layers might become thicker.With arial premature beats,the space or distance between layers varied.Ventricular premature beats presented equal space or distance between layers.With tachycardia,the lower layer became a“solid”layer.With atrial fibration,the“stratification”disappeared,presenting thicker or widened layers or bands,with neat lower boundary.With atrial flutter,the layers went parallel,with the layers being evenly separated or some distances being exact multiples of others.The second degree atrioventricular block displayed two layers,the lower and upper bands being equally away from the X-axis,presenting a straight line(pacing at a fixed rate)or a thicker or wider bands,with a neat upper boundary(the lowest pacing rate).When the scatter plot presented uncharacteristic patterns or had some scattered points,which rendered diagnosis difficult,a reverse technology could be used.Briefly,upon selection of scattered points,they were subjected to computerization,by regression,to reveal the piece of electrocardiogram(ECG)containing an R wave(QRS complex).Then ECG was analyzed to diagnose the cardiac rhythms.In conclusion,t-RR is a novel methodology which helps us understand heart rhythms from a new perspective.展开更多
目的 观察窦性心率谱在冠心病(CHD)患者中的变化及其经皮冠状动脉介入(PCI)术对其产生的影响。方法 收集101例行冠状动脉造影(CAG)患者的术前24 h 12导联动态心电图信息,根据CAG结果分为CHD组71例(至少1支主要血管狭窄≥50%)和对照组30...目的 观察窦性心率谱在冠心病(CHD)患者中的变化及其经皮冠状动脉介入(PCI)术对其产生的影响。方法 收集101例行冠状动脉造影(CAG)患者的术前24 h 12导联动态心电图信息,根据CAG结果分为CHD组71例(至少1支主要血管狭窄≥50%)和对照组30例。CHD组中36例行PCI,并行PCI术前与术后48 h内24 h动态心电图信息的比较。比较不同分组Lorenz-RR散点图稳态吸引子、时间散点图形态与相关测量值。结果 CHD组稳态吸引子多为非棒球拍形,总占比95.8%,对照组多为棒球拍形(50.0%);PCI术后组棒球拍形(33.3%)占比较术前(5.6%)增多,P<0.05;CHD组的Lorenz-RR散点图的长轴(SD2)短于对照组[(850.479±168.064) ms vs (943.700±176.053) ms,P=0.014],PCI术后组SD2短于PCI术前组[(747.056±150.603) ms vs (832.139±145.348)ms,P=0.001],时间散点图条带平均宽度大于术前组[(2.250±0.613)ms vs (1.917±0.579) ms,P<0.05]。结论 冠状动脉狭窄与狭窄解除后窦性心率谱的变化反映了心脏自主神经张力的变化及其对心率调节与平衡的影响。展开更多
文摘Lorenz-RR scatter plot has an obvious shortcoming in that it does not indicate the time when the scatter point happens.On the Lorenz RR scatter plot,one cannot know the time during which the cardiac rhythms take place.Since occurrence of cardiac rhythms is time-related,time should be introduced to such plots.In this study,time was used as abscissa and RR interval(the time interval between the previous RR wave and the R wave)as the ordinate and time was compressed into a visually observable length,and thereby a timed RR-interval scatter plot,or t-RR scatter plot,for short,was developed.On t-RR scatter plot,the patterns were band-shaped or were of linear type.On the t-RR plot,the sinus rhythm presented bands of various widths,with the spiculate or burred upper and lower boundaries,having diurnal variation.Premature beats showed separate layers(“stratification”),the layer number corresponding the number of RR-intervals.With simple premature beats,the layers were clearly separated.With parasystole rhythm,the upper and lower bands or layers might become thicker.With arial premature beats,the space or distance between layers varied.Ventricular premature beats presented equal space or distance between layers.With tachycardia,the lower layer became a“solid”layer.With atrial fibration,the“stratification”disappeared,presenting thicker or widened layers or bands,with neat lower boundary.With atrial flutter,the layers went parallel,with the layers being evenly separated or some distances being exact multiples of others.The second degree atrioventricular block displayed two layers,the lower and upper bands being equally away from the X-axis,presenting a straight line(pacing at a fixed rate)or a thicker or wider bands,with a neat upper boundary(the lowest pacing rate).When the scatter plot presented uncharacteristic patterns or had some scattered points,which rendered diagnosis difficult,a reverse technology could be used.Briefly,upon selection of scattered points,they were subjected to computerization,by regression,to reveal the piece of electrocardiogram(ECG)containing an R wave(QRS complex).Then ECG was analyzed to diagnose the cardiac rhythms.In conclusion,t-RR is a novel methodology which helps us understand heart rhythms from a new perspective.
文摘目的 观察窦性心率谱在冠心病(CHD)患者中的变化及其经皮冠状动脉介入(PCI)术对其产生的影响。方法 收集101例行冠状动脉造影(CAG)患者的术前24 h 12导联动态心电图信息,根据CAG结果分为CHD组71例(至少1支主要血管狭窄≥50%)和对照组30例。CHD组中36例行PCI,并行PCI术前与术后48 h内24 h动态心电图信息的比较。比较不同分组Lorenz-RR散点图稳态吸引子、时间散点图形态与相关测量值。结果 CHD组稳态吸引子多为非棒球拍形,总占比95.8%,对照组多为棒球拍形(50.0%);PCI术后组棒球拍形(33.3%)占比较术前(5.6%)增多,P<0.05;CHD组的Lorenz-RR散点图的长轴(SD2)短于对照组[(850.479±168.064) ms vs (943.700±176.053) ms,P=0.014],PCI术后组SD2短于PCI术前组[(747.056±150.603) ms vs (832.139±145.348)ms,P=0.001],时间散点图条带平均宽度大于术前组[(2.250±0.613)ms vs (1.917±0.579) ms,P<0.05]。结论 冠状动脉狭窄与狭窄解除后窦性心率谱的变化反映了心脏自主神经张力的变化及其对心率调节与平衡的影响。
