What does rightward axis mean on an ECG?

A rightward axis on an ECG refers to the electrical activity of the heart being predominantly directed towards the right side of the body, typically indicated by a mean electrical axis of +90 degrees to +180 degrees. This can occur in conditions such as right ventricular hypertrophy, chronic obstructive pulmonary disease (COPD), or a right bundle branch block. A rightward axis may suggest underlying cardiac issues that require further evaluation. It is important to interpret this finding in conjunction with other ECG criteria and clinical information.