Visual Summary

Beta-Blockers in Heart Failure

Module 3 — Introduction to Medical Pharmacology

Why It Works: Acute Harm Becomes Chronic Benefit

Old Thinking

Sympathetic drive helps a weak heart pump

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Reality

Chronic sympathetic activation injures the heart over time

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At Start

Beta-blockers can transiently worsen pumping

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Over Months

Ejection fraction improves with reverse remodeling

The Three Approved Agents

Non-Selective Plus Alpha-1

Carvedilol

  • Blocks beta-1, beta-2, and alpha-1
  • Vasodilating, more hypotension risk

Beta-1 Selective

Metoprolol Succinate

  • Extended-release, once daily
  • Not interchangeable with metoprolol tartrate

Most Beta-1 Selective

Bisoprolol

  • Once daily
  • Preferred with significant reactive airway disease
Only these three agents are proven in heart failure Do not stop abruptly during hospitalization