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| Value of Lorenz scatter plot in predicting the prognosis of patients with acute myocardial infarction |
| GUO Chao, ZHANG Hui, CHEN Min |
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Abstract Objective To investigate the relationship between morphological characteristics of Lorenz scatter plot and the prognosis among patients with acute myocardial infarction (AMI). Methods A total of 80 patients with AMI were selected as the research objects. All the patients underwent ambulatory electrocardiography examination after being definitely diagnosed. The obtained data were analyzed in the Lorenz scatter plot method. According to the follow-up results after treatment, the patients were divided into good prognosis group and poor prognosis group. The incidence of arrhythmias and the distribution characteristics of Lorenz scatter plot were compared between the two groups, and the correlation between the prognosis and the characteristics of Lorenz scatter plot was analyzed. ResultsAmong the 80 patients with AMI, the incidence of occasional premature supraventricular beats is the highest, reaching 31.25% while the incidence of RR interval>2.5 s is the lowest, reaching 2.50%. After one year of follow-up, 54 cases are divided into the good prognosis group and 26 cases are divided into the poor prognosis group. The incidence of occasional premature supraventricular beats, frequent premature supraventricular beats, occasional premature ventricular beats (PVB), frequent PVB, and conduction block in the good prognosis group are significantly lower than those in the poor prognosis group with statistically significant differences (P<0.05). There is no significant difference in the incidence of atrial fibrillation and RR interval>2.5 s between the two groups (P>0.05). In the poor prognosis group, the proportion of fanshaped, three and fourdistributed, irregular, complex, and short rodshaped Lorenz scatter plot are significantly higher than those in the good prognosis group. The proportion of baseball bat and cometshaped distributed Lorenz scatter plot along the 45° line are significantly lower than those in the good prognosis group (P<0.05). Spearman correlation analysis shows that the prognosis is significantly related to the distribution of Lorenz scatter plots (r=0.338, P=0.002). AMI patients featured by baseball bat and cometshaped distributed Lorenz scatter plot have better prognosis. Conclusion Lorenz scatter plot has important value in predicting the prognosis of AMI patients.
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. [J]. JOURNAL OF PRACTICAL ELECTROCARDIOLOGY, 2021, 30(6): 448-452. |
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