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  Indian J Med Microbiol
 

Figure 2: Electrocardiography tracing of a 6-year-old girl with ventricular septal defect. Note the variable heart rate (71 to 115/min, varying P-wave morphology and duration, and beat to beat variation in PR-interval - all pointing to a wandering atrial pacemaker

Figure 2: Electrocardiography tracing of a 6-year-old girl with ventricular septal defect. Note the variable heart rate (71 to 115/min, varying P-wave morphology and duration, and beat to beat variation in PR-interval - all pointing to a wandering atrial pacemaker