Table 1.

Comparison of cardiac catheterization vs. TTE in AS diagnostic pathway.

	Advantages	Pitfalls
Echocardiography	Non invasive Widely anatomical assessment Instantaneous transaortic pressure drop measurement	Operator dependent Poor quality of image Lack of alignment Low flow states Hearth rhythm disorders Overstatement in case of high output condition
Cardiac Catheterization	Direct measurement of mean transaortic pressure drop Assessment of hemodynamic status	Invasive Radiation exposure Risk of embolic stroke Unknown exact anatomic point where pressure recovery occurs