After aortic valve replacement, a clicking sound is a common complaint reported by patients. Generally, the noise is caused by a small disc that moves inside the artificial valve. While this sound may be alarming at first, it is often not a cause for concern as the disc typically remains in a single position and does not cause any damage to the aorta or heart. Most people become accustomed to the clicking. If you experience pain or irregular heartbeats with this clicking noise, it is recommended that you seek medical attention right away.