Antihypertensive treatment changed within the last two weeks prior to the CAG.

Severe aortic valve stenosis (\<1 cm) as central hemodynamics may be altered

Maximum number of patients in CKD-group already reached.

Atrial fibrillation or other cardiac arrhythmia making radial Pulse Wave Analysis (PWA) estimations impossible.

Known significant stenosis of a. subclavia or a. brachialis

Bilateral arteriovenous-fistula (even if one or both of these have been surgically removed) as this may significantly affect the pulse-wave form.

Aortic Calcification and Central Blood Pressure in Patients With Chronic Kidney Disease