ABSTRACT
An ECG recording showed an R wave 10.4 mm high in lead I and 6 mm high in lead aVF. a. Is the size difference indicative of cardiac disease? b. What angle in the frontal plane does a lead I recording represent? c. What angle in the frontal plane does a lead aVF recording represent? d. What angle is the patient’s cardiac electrical axis? (Hint: review Figure 5.3, and remember
Pythagorus from your schooldays!) e. Is this electrical axis typical of left ventricular hypertrophy?
