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Ivabradine: pharmacodynamic aspects of its clinical use
1Institute for Experimental and Clinical Pharmacology and Toxicology, Friedrich-Alexander-University, Erlangen-Nuremberg, Germany. stieber@pharmakologie.uni-erlangen.de
Insights
Ivabradine effectively lowers heart rate by inhibiting the If pacemaker current, offering a favorable alternative to beta-blockers for chronic stable angina. Clinical data suggest it
Area of Science:
- Cardiology
- Pharmacology
- Clinical Medicine
Background:
- Ivabradine is approved for chronic stable angina when beta-blockers are contraindicated or not tolerated.
- It functions by selectively inhibiting the If pacemaker current in the sinoatrial node.
- Compared to other heart rate-lowering agents, ivabradine shows a potentially lower incidence of adverse reactions.
Purpose of the Study:
- To review experimental and preclinical data on ivabradine.
- To investigate the potential and limitations of its clinical application.
- To assess its role as a first-choice agent for heart rate reduction.
Main Methods:
- Evaluation of experimental and preclinical studies.
- Analysis of clinical trial data.
- Assessment of pharmacodynamic properties and clinical consequences.
Main Results:
- Ivabradine effectively lowers heart rate via If current inhibition.
- Experimental studies identified potential off-target effects at high concentrations.
- Clinical studies indicate no adverse consequences at recommended doses with strict contraindication adherence.
Conclusions:
- Ivabradine presents a favorable profile for pure heart rate-lowering therapy.
- Potential unfavorable pharmacodynamic properties do not manifest clinically under recommended usage.
- It may become a preferred treatment option for specific patient populations.
Abstract:
Ivabradine has been approved as a heart rate-lowering agent for use in the treatment of chronic stable angina pectoris in case of contraindication or intolerance to beta-blockers. This drug effectively lowers the heart rate by inhibiting the pacemaker current I(f) in the sinoatrial node. It appears to induce fewer adverse reactions than other drugs used for reducing the heart rate, such as calcium channel blockers or beta-blockers. Because of this favorable profile, ivabradine could become the first-choice drug when pure heart rate-lowering is the therapeutic goal. This review evaluates experimental and preclinical data to investigate the possibilities, as well as the limitations, of the clinical use of ivabradine. In experimental studies, it has been shown that ivabradine does have some unfavorable pharmacodynamic properties, such as the block of all four hyperpolarization-activated cyclic nucleotide-gated channels and block of other ion channels at high concentrations. Clinical studies, however, indicate that those properties do not result in clinical consequences as long as ivabradine is given at the recommended dose and contraindications are strictly observed.
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