axis138Before calculating the heart axis, we must understand that each lead represents a different point of view of the same electrical stimulus.. To calculate the cardiac axis we will only use the limbs leads. Taking the exampleRelease date: New products. AXIS D4100-VE Mk II. AXIS D4200-VE. AXIS I8307-VE . Corrections. AXIS Sensor Metrics Dashboard Applies to: AXIS F9104-B, AXIS F9111, AXIS F9114, AXIS F9114-B, AXIS F9104-B Mk II, AXIS