Transthoracic Echocardiography (TTE) is the best initial<unk>  modality for evaluating AS severity. Although, multimodality<unk>  is needed for preprocedural planning and intraoperative decision making given the complex 3D anatomy of the aortic valve, sinuses, and annulus.
Multi-Detector CT (MDCT) is a core element of the standard<unk>  pathway for the preprocedural planning of<unk> .
In patients being evaluated for<unk> , MDCT systems with at least 64 detectors and a spatial resolution of 0.5 to 0.6 mm are recommended.
Evaluation of kidney function to avoid contrast induced nephropathy must be taken in to consideration.
TAVR imaging
TAVR evaluation
TIMI frame count 
Coronary angiography quantitative angiography
Pulmonary hypertension CT
Palpitation x ray
Air embolism CT
Auscultation