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Application of ambulatory electrocardiography examination in diagnosing atrial fibrillation complicating second degree atrioventricular block |
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Abstract Objective To discuss the efficacy of ambulatory electrocardiography(AECG) examination in diagnosing atrial fibrillation complicating second degree atrioventricular block(AVB). Methods Eighty-two patients with atrial fibrillation were inspected by AECG. They had been admitted to our hospital from April 2016 to May 2017. The effect of application of AECG in diagnosing atrial fibrillation complicating second degree AVB was analyzed. Results The mean RR interval of the patients with second degree AVB was significantly longer than that of the patients with first degree AVB, with statistically significant difference[(2.66±0.34) s vs. (2.22±0.23) s, P<0.05]. The ventricular rate of the patients with second degree AVB was significantly lower than that of the patients with first degree AVB, with statistically significant difference[(71.17±6.40) times/min vs. (82.23±7.92) times/min, P<0.05]. The ECG scatterplot of the patients with second degree AVB was characterized by balanced distributed wide strips with uniform width, obvious manifestations in upper boundary and no obvious manifestation in lower boundary. The scatterplot of the patients with first and third degree AVB was narrow in width; no significant feature was showed both in the upper and lower boundaries; the distribution density and width of scattered points was not significantly characteristic. Conclusion AECG examination can be applied in effectively monitoring the changes of heart rate and accurately providing information feedback of electrocardiographic changes. A combination of AECG examination and scatterplot can provide more accurate information in diagnosing atrial fibrillation complicating second degree AVB and improve the diagnostic accuracy of the disease.
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