Attenuation of Hemodynamic Response to Laryngoscopy and Endotracheal Intubation With Single Dose of Dexmedetomidine in Hypertensive Patients.

Inclusion Criteria: * \- Age group 20-60 years * ASA grade 1 and 2 * control hypertensive patients. Exclusion Criteria: * \- Consent not given * ASA Grade 3 and 4 * history of myocardial ischemia or infarction, or had an abnormal ECG on admission to the hospital * Patients with cardiovascular, pulmonary, hepatic, and renal disease. * Patients on B blockers. * patients with difficult airway; laryngoscopy and intubation time more than 20 s, or requiring more than two attempts will be exclude from the study.