Atenolol, a selective beta-blocker agent, blocks cardiac beta1 receptors which affect mainly the cardiovascular system (decrease heart rhythm, decrease cardiac contraction and decrease blood pressure); in patients with angina pectoris, it lowers myocardial oxygen requirements, decreases angina crisis frequency, lowers nitrate requirements, and increases the physical work tolerance. Atenolol decreases the systolic and diastolic arterial pressure.
Atenolol is indicated in arterial hypertension (essential or renal, alone or combined with other drugs); angina pectoris caused by coronary arteriosclerosis; ventricular arrythmia; arrythmia or supraventricular tachycardia; acute myocardial infarction.