 The published literature reports that the need for pacemaker after AAC is very rare as the (electrical) conduction center of the heart near the aortic valve is not disturbed in any way.AAC avoids the risk of leakage around a replacement heart valve (aortic insufficiency), a serious complication of alternate treatments such as aortic valve replacement (AVR) and percutaneous aortic valve replacement (PAVR or TAVI).With AAC, the native aortic valve is left completely undisturbed.