Underutilization of beta-blockers in patients undergoing implantable cardioverter-defibrillator and cardiac

Paul J Hauptman1, Jason P Swindle, Frederick A Masoudi

  • 1Department of Medicine, Division of Cardiology, Saint Louis University School of Medicine, St Louis, MO 63110, USA. hauptmpj@slu.edu

Insights

Beta-blockers (BB) are underused in heart failure patients before and after cardiac device implantation, despite guidelines recommending optimal medical therapy. Post-procedure BB use shows a modest increase, highlighting a need for improved pre-procedure management.

Area of Science:

  • Cardiology
  • Pharmacology
  • Health Services Research

Background:

  • Current guidelines advocate for optimal medical therapy prior to cardiac device implantation.
  • Evaluation of beta-blocker (BB) utilization in heart failure patients undergoing cardiac device procedures is essential.

Purpose of the Study:

  • To assess the utilization of beta-blockers (BB) in patients with heart failure before and after cardiac device implantation.
  • To identify trends in BB use in relation to cardiac device procedures.

Main Methods:

  • Analysis of a large, multistate managed-care database (2003-2006).
  • Inclusion criteria: adults with heart failure diagnosis and cardiac device procedure, with 180-day pre- and post-procedure enrollment.
  • Primary outcome measures: BB use before device procedure and changes in use after discharge.

Main Results:

  • A total of 2766 patients (78.8% male, median age 61) underwent primary prevention device procedures.
  • 33.4% of patients did not have a pharmacy fill for BB in the 90 days preceding the procedure; these patients were older with fewer cardiology visits.
  • BB use increased post-procedure, with 83.4% having at least one pharmacy fill during follow-up.

Conclusions:

  • Beta-blockers (BB) are underutilized both before and after cardiac device procedures in heart failure patients.
  • A slight increase in BB use is observed after device implantation.
  • Strategies are needed to ensure optimal medical therapy, including BB, is initiated before device selection.
Abstract

Related Concept Videos

Antiarrhythmic Drugs: Class II Agents as β-Adrenergic Blockers01:24

Antiarrhythmic Drugs: Class II Agents as β-Adrenergic Blockers

Adrenergic stimulation generally impacts cardiac rate and rhythm. Specifically, stimulation of the β-adrenoceptors triggers an increase in intracellular calcium ion influx and pacemaker currents, which may cause arrhythmias. Catecholamines like adrenaline also demonstrate β2-adrenoceptor-mediated hypokalemia, impacting cardiac action potential and disrupting the normal cardiac rhythm. Class II antiarrhythmic drugs are β-adrenoceptor antagonists or β-blockers, which indirectly block calcium...
Heart Failure Drugs: β-Blockers01:22

Heart Failure Drugs: β-Blockers

β-adrenergic antagonists, commonly known as β-blockers, block the effects of sympathetic neurotransmitters such as noradrenaline (NA) and adrenaline (ADR). They have several beneficial effects in heart failure treatment. They reduce heart rate, the force of contraction, and cardiac muscle relaxation. They also slow the atrial-ventricular conduction rate and raise the threshold for arrhythmias. The concentration of β-blockers determines their effects on bronchodilation, vasodilation, and...
Dysrhythmias VI: Management of Dysrhythmias01:25

Dysrhythmias VI: Management of Dysrhythmias

Dysrhythmia management involves a multifaceted approach, incorporating pharmacological treatments, medical procedures, surgical interventions, lifestyle modifications, and patient education.Pharmacological ManagementAntiarrhythmic Drugs:Class I (Sodium Channel Blockers): This class includes quinidine and procainamide, which reduce the speed of impulse conduction in the heart, stabilize the cardiac membrane, and control arrhythmias. Quinidine and procainamide are Class IA agents that prolong the...
Adrenergic Antagonists: Pharmacological Actions of β-Receptor Blockers01:27

Adrenergic Antagonists: Pharmacological Actions of β-Receptor Blockers

β-receptor blockers significantly impact the cardiovascular system by counteracting catecholamine-induced sympathetic responses. These medications decrease heart rate, contractility, and cardiac output, potentially leading to cardiac depression, life-threatening bradycardia, and death. Therapeutically, β-blockers function as mild antihypertensives and are utilized in treating angina pectoris and cardiac arrhythmias. However, nonselective β-blockers inhibit β2-receptors in bronchial smooth...
Adrenergic Antagonists: ɑ and β-Receptor Blockers01:31

Adrenergic Antagonists: ɑ and β-Receptor Blockers

Third-generation β-blockers, such as labetalol and carvedilol, represent a significant advancement in managing cardiovascular conditions. Unlike conventional β-blockers, which can induce peripheral vasoconstriction, third-generation drugs block α1 adrenoceptors. This promotes vasodilation through several mechanisms, such as increased nitric oxide production, inhibition of calcium ion entry, opening of potassium ion channels, and antioxidant action. Labetalol, for instance, is clinically...
Heart Failure Drugs: Inhibitors of Renin-Angiotensin System01:26

Heart Failure Drugs: Inhibitors of Renin-Angiotensin System

The activation of the sympathetic nervous system and the renin-angiotensin-aldosterone system (RAAS) contributes to cardiac remodeling, and inhibiting the RAAS is a pharmacological target in heart failure management. As a result, neurohumoral modulation is a crucial treatment principle for managing heart failure. This approach involves using medications like ACE inhibitors (ACEIs), angiotensin receptor blockers (ARBs), β-blockers, mineralocorticoid receptor antagonists (MRAs), and neutral...