In EKG terminology, what does RAD stand for?

Right Axis Deviation (RAD) refers to a shift in the electrical axis of the heart to the right side, which is typically measured on an electrocardiogram (EKG). Normally, the heart's electrical axis is oriented between -30 degrees and +90 degrees; when it deviates beyond this range toward the right, it indicates either structural changes in the heart or the presence of certain medical conditions.

RAD can be identified by analyzing the lead II and lead III readings on the EKG. In RAD, lead I shows a decreased positive deflection, while lead III shows an increased positive deflection. This can be associated with conditions such as right ventricular hypertrophy, chronic obstructive pulmonary disease (COPD), pulmonary embolism, and other conditions affecting right heart function.

Understanding RAD is significant in the clinical setting because it can provide insight into a patient’s cardiovascular health and guide further diagnostic evaluation and treatment.