The pulse amplitude measures the pulse quality, which indicates the strength of the left ventricular contraction.

Additionally, it evaluates the uniformity of blood circulation throughout the blood vessels.

The amplitude of peripheral pulses is palpable in areas where the arteries run superficially in the peripheral region.

It can be palpated at various locations, such as the temporal, carotid, apical, brachial, radial, ulnar, femoral, popliteal, posterior tibial and dorsalis pedis arteries.

Pulse quality is graded on a scale of 0 to 4+ using the amplitude grading system.

When assessing pulse, a 0 reading indicates an absence of pulsation, even when force is applied.

The 1+ is a thready pulse, hard to find, and even slight pressure causes it to disappear.

Similarly, 2+ is a weak pulse stronger than the thready, and a light pressure causes the pulse to disappear.

A pulse of 3+ is normal and easy to detect, and moderate pressure causes the pulse to disappear.

The 4+ is a bounding pulse, so strong that it persists even with moderate pressure.