| Background: Cardiovascular disease is the leading cause of death worldwide,and coronary artery disease is a major cause.Coronary atherosclerotic sex heart disease namely coronary heart disease,show coronary artery produces atherosclerotic sex to cause lumen narrow or occlusive,bring about myocardial ischemia anoxia or necrotic and cause heart disease,threaten human health seriously.Coronary angiography（CAG） is currently recognized as the "gold standard" for the diagnosis of coronary heart disease.However,it is an invasive and complicated procedure,and with the widespread application of coronary angiography,it is obvious that not all patients with clinical suspicion of myocardial ischemia have fixed coronary atherosclerotic obstruction.Ambulate monitoring is inexpensive and noninvasive,and can identify transient episodes of myocardial ischemia,often a precursor to myocardial infarction,even when asymptomatic.While the detection time of dynamic electrocardiogram is long,doctors can shorten the analysis time,improve accuracy and intuitively monitor the occurrence of myocardial ischemia events by combining the ST segment trend diagram when analyzing arrhythmia and myocardial ischemia as a whole.Objective: To investigate the clinical diagnostic value of intermittent night-time ST segment trend pattern change of dynamic electrocardiogram in coronary heart disease.Methods: 50 patients with intermittent nocturnal ST segment trend pattern change and55 patients with no nocturnal ST segment trend pattern change were selected from our hospital by dynamic electrocardiogram.All patients underwent coronary angiography to analyze the clinical diagnostic value of nocturnal ST segment trend pattern change for coronary heart disease.Results: The detection rate of coronary heart disease without nocturnal ST segment changes（21.82%）was significantly lower than that of nocturnal ST segment changes（92%）,and the difference was statistically significant（P < 0.05）.Among the 50 patients with intermittent nocturnal ST segment trend pattern changes,29 were male and 21 were female,with a male to female ratio of 1.4∶1.The mean ages of male and female were（63.0 ± 13.1）years and（64.5±13.9）years,respectively（P > 0.05）.The change duration of ST segment trend chart in CHD group（13.75±1.71）min was not significantly different from that in non-CHD group（10.72±5.60）min（P > 0.05）.The detection rate of CORONARY heart disease（CHD）in the nighttime ST segment trend chart with "peak type" dynamic change group（95.56%）was significantly higher than that in the "wall type" dynamic change group（60.00%）,and the difference was statistically significant（P < 0.05）.Conclusion: This study showed that intermittent nocturnal ST-segment trend pattern changes are helpful for early diagnosis of coronary heart disease.There was no significant difference in age of onset between male and female.The night-time ST segment trend showed a "peak shape" change,suggesting coronary artery disease.There was no significant relationship between the duration of ST segment trend and the degree of coronary stenosis. |
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