This electrocardiogram shows low voltage.

The characteristic feature is the QRS amplitude of less than or equal to 5 mm (0.5 mv or 5 small boxes) in the limb leads and less than or equal to 10 mm (1.0 mv or 10 small boxes) in the precordial leads when the ECG is taken at normal standardization.

There are many etiologies of low voltage. The most common include pericardial effusion, chronic obstructive lung disease, obesity and cardiac amyloidosis.