Beta-blockers in hypertension

  • Ram C
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Beta blockers have been used in the treatment of cardiovascular conditions for decades. Despite a long history and status as a guideline-recommended treatment option for hypertension, recent meta-analyses have brought into question whether β blockers are still an appropriate therapy given outcomes data from other antihypertensive drug classes. However, β blockers are a heterogenous class of agents with diverse pharmacologic and physiologic properties. Much of the unfavorable data revealed in the recent meta-analyses were gleaned from studies involving nonvasodilating, traditional β blockers, such as atenolol. However, findings with traditional β blockers may not be extrapolated to other members of the class, particularly those agents with vasodilatory activity. Vasodilatory β blockers (i.e., carvedilol and nebivolol) reduce blood pressure in large part through reducing systemic vascular resistance rather than by decreasing cardiac output, as is observed with traditional β blockers. Vasodilating ability may also ameliorate some of the concerns associated with traditional β blockade, such as the adverse effects on metabolic and lipid parameters, including an increased risk for new-onset diabetes. Furthermore, vasodilating ability is physiologically relevant and important in treating a condition with common co-morbidities involving metabolic and lipid abnormalities such as hypertension. In patients with hypertension and diabetes or coronary artery disease, vasodilating β blockers provide effective blood pressure control with neutral or beneficial effects on important parameters for the co-morbid disease. In conclusion, it is time for a reexamination of the clinical evidence for the use of β blockers in hypertension, recognizing that there are patients for whom β blockers, particularly those with vasodilatory actions, are an appropriate treatment option. © 2010 Elsevier Inc. All rights reserved.

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  • C. Venkata S. Ram

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