DISCUSSION OF THE DIAGNOSE OF PERSISTENT ATRIAL FIBRILLATION ACCOMPANY WITH II DEGREE ATRIAL VENTRICULAR BLOCK THROUGH THE T-RR PLOT OF AMBULATORY ELECTROCARDIOGRAM
Aims: To diagnose qualitatively the persistent atrial fibrillation (Af) accompany with II degree atrial ventricular block (AVB) by observing the characters of the t-RR plot of ambulatory electrocardiogram (AECG).
Methods: We selected 340 cases who had been diagnosed persistent atrial fibrillation from 10900 ambulatory electrocardiogram, and then divided them into three groups A: Simple persistent atrial fibrillation B: Persistent atrial fibrillation with two degree atrioventricular block and C: Persistent atrial fibrillation + ventricular pacemaker)
- The stripe of the t-RR plot in group A was wide,and the upper limb was like thin cloudiness,whereas the lower limb was a limited stripe or wave;
- The upper limb which was between 1.5s and 1.8s in the stripe of t-RR plot in group B was obvious, whereas the lower limb was like spots or cloudiness.
- The character of the t-RR plot in group C was similar to group B,but the boundary of the upper limb in former was within 1.2s;
- We can find the obvious difference in group B which there was a evident limited line located between 1.5s and 1.8s.We also find the mean age in group A was higher than that in group B and group A was the lowest.Conclusion:We can visually rapidly and qualitatively diagnose the persistent atrial fibrillation accompany with II degree atrial ventricular block under the help of the t-RR plot of 1h ambulatory electrocardiogram with the character that the diagram has a evident limited line located between 1.5s and 1.8s.
Fig. 93.1. The ambulatory electrocardiogram of persistent atrial fibrillation accompany with II degree atrial ventricular block,the second stripe indicates 24 hour t-RR plot.