special considerations

For infants or children with very fast heart rates you may find it necessary to adjust the paper speed to 50mm/ sec; This will allow the physician to view each of the deflections on the ECG

patients with ventricular infarction may need V4R (V4 placed on the right side of the chest)

By increasing the speed to 50 mm/second, the EKG appears to slow, and waves that were previously bunched together due to tachycardia become more clearly visible because of the spacing of the waveforms