If a single reading for arterial hypertension in msSBP \> 180 mmHg or msDBP \> 110 mmHg at any visit after randomization.

Inability to discontinue all prior antihypertensive medications safely for a period of 2 weeks prior to randomization.

Known history of hypotensive symptoms or orthostatic hypotension.

Concomitant use of statins or statin intake during the four weeks prior to Visit 1.

Known Keith-Wagener grade III or IV hypertensive retinopathy.

A history of heart failure (NYHA II-IV).

Safety and Efficacy of Valsartan vs Atenolol and Hydrochlorothiazide Combination on Blood Flow in Hypertensive Patients