ABSTRACT
Additional comments The voltage calibration setting is 20 mm/mV, double the ‘standard’ setting.
1. At first glance, this ECG might appear to meet a number of the diagnostic criteria for left ventricular hypertrophy (see Case 35). However, on closer inspection it can be seen that the voltage calibration has been set at 20mm/mV, which is double the standard setting (10 mm/ mV). Therefore all the waves/complexes on the ECG will be twice their ‘usual’ size. When this is taken into account, the ECG is in fact normal.
