Which beta blocker is known for its cardioselective properties?

Atenolol is known for its cardioselective properties, meaning it primarily blocks beta-1 adrenergic receptors found in the heart, leading to a decrease in heart rate and myocardial contractility without significantly affecting beta-2 receptors, which are more prominent in vascular smooth muscle and the lungs. This selectivity makes atenolol particularly useful for patients with respiratory issues like asthma, as it minimizes the risk of bronchoconstriction that can occur with non-selective beta blockers.

Propranolol, in contrast, is a non-selective beta blocker, affecting both beta-1 and beta-2 receptors, which can lead to side effects in individuals with asthma or other pulmonary conditions. Carvedilol has additional alpha-blocking properties, and although it can provide benefits for heart failure patients, it is not classified as cardioselective. Sotalol, while beneficial in certain arrhythmias, also lacks the same level of cardioselective action as atenolol. Thus, the cardioselectivity of atenolol makes it the preferred choice in situations where selective beta-1 blockade is desirable.