RESUMO
Two groups of drugs commonly used for the treatment of hypertension are atenolol and amlodipine. These drugs are reported to have conflicting changes on pulmonary responses. In order to study the effect of hypertension and antihypertensive treatment on pulmonary responses, 40 patients with essential hypertension having diastolic blood pressure between 90-114 mmHg on three consecutive weekly visits were taken. Pulmonary responses were tested at the end of 2 weeks of placebo washout period and then at the end of 6 weeks of treatment with either atenolol or amodipine. Using a computerized autospiror along with the weekly recordings of heart rate and blood pressure, the various pulmonary and cardiac parameters were taken. Analysis of the result showed that atenolol treatment resulted in significant decline of forced vital capacity (FVC), % forced vital capacity (%FVC), and forced expiratory volume in first second (FEV1) whereas amlodipine did not show any significant change on pulmonary parameters.