Final answer:
The common selective beta 1 adrenergic agonist used for treating cardiogenic shock or heart failure is Dobutamine. It targets the beta 1 receptors in the heart to improve myocardial contractility, contrasting with beta-blockers which inhibit these receptors and are used in the management of hypertension.
Step-by-step explanation:
The common selective beta 1 adrenergic agonist used for the treatment of cardiogenic shock or heart failure is a. Dobutamine. Dobutamine is specifically designed to increase heart rate and improve cardiac output by stimulating beta 1 receptors in the heart without causing significant stimulation of beta 2 or alpha receptors, which mainly affect the lungs and vascular system, respectively.
Selective beta 1 adrenergic agonists benefit cardiac function by enhancing myocardial contractility, helping in conditions where the heart cannot pump sufficient blood, such as in heart failure or cardiogenic shock. In contrast, beta-blockers like metoprolol or propanolol inhibit these receptors and are used in treating hypertension, among other cardiovascular conditions, by preventing vasoconstriction and reducing heart rate.