Book excerpt: Essential (primary) Hypertension is the most current, concise, and practical step-by-step guide to the diagnosis, evaluation, and treatment of hypertension. This book provides all the knowledge base needed to identify and manage patients with Hypertension. 60% of those over the age of 60 suffer from Hypertension, a disease which affects hundreds of millions of individuals worldwide. This book guides the reader to understanding, proper diagnosis treatment.