Reverse gradient between aorta and left ventricle

Reverse gradient between aorta and left ventricle

Can there be a reverse gradient between aorta and left ventricle, with aortic pressure higher than that in left ventricle?
Theoretically it is not possible as the factor driving the aortic flow is the left ventricular systolic pressure and ejectile force. But practically when a pull back pressure tracing is taken from left ventricle to aorta, sometimes the peak pressure in the aorta may be slightly higher than that in the left ventricle. This is due to the peripheral amplification of the pressure wave and is more prominent if a left ventricular tracing is compared with a femoral arterial pressure tracing.