الفهرس 
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Abstract
The aged people are prone to many diseases especially hypertension. B-blockers have been used increasingly in the treatment of hypertension. Aging is associated with altered pharmacokinetic and pharmacodynamic properties of the drugs. Eiderly patient will handle or respond to certain group of drugs differently than younger patients(Gerber & Brass, 1990) . The present work is a comparative study of the effect of therapeutic doses of different B-blockers in elderly versus younger hypertensives on some haemodynamic, electrocardiographic parameters and the changes in mood and cognitive functions. The material of our study comprised: (24) elderly hypertensive patients of mean age (70.08±9.24 years) .(24) younger hypertensive patients of mean age (40.2±4.5 years) . The patients were selected from out patients clinic of Mansoura University Hospital. The patients were subjected to thorough history taking, clinical examination with stress on heart rate.