Ivabradine

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Ivabradine
Ivabradine Structural Formula V.1.svg
Ivabradine-based-on-xtal-3D-bs-17.png
Clinical data
Pronunciation /ɪˈvæbrədn/
Trade names Corlanor, Procoralan, others
Other namesS-16257
AHFS/Drugs.com Monograph
MedlinePlus a615027
License data
Routes of
administration
By mouth
ATC code
Legal status
Legal status
Pharmacokinetic data
Bioavailability 40%
Protein binding 70%
Metabolism Liver (first-pass) >50%, CYP3A4-mediated
Elimination half-life 6 hours
Excretion Kidney and fecal
Identifiers
  • 3-[3-({[(7S)-3,4-dimethoxybicyclo[4.2.0]octa-1,3,5-trien-7-yl]methyl}(methyl)amino)propyl]-7,8-dimethoxy-2,3,4,5-tetrahydro-1H-3-benzazepin-2-one
CAS Number
PubChem CID
IUPHAR/BPS
DrugBank
ChemSpider
UNII
KEGG
ChEBI
ChEMBL
CompTox Dashboard (EPA)
Chemical and physical data
Formula C27H36N2O5
Molar mass 468.594 g·mol−1
3D model (JSmol)
  • O=C2N(CCc1cc(OC)c(OC)cc1C2)CCCN(C[C@@H]4c3cc(OC)c(OC)cc3C4)C
  • InChI=1S/C27H36N2O5/c1-28(17-21-11-20-14-25(33-4)26(34-5)16-22(20)21)8-6-9-29-10-7-18-12-23(31-2)24(32-3)13-19(18)15-27(29)30/h12-14,16,21H,6-11,15,17H2,1-5H3/t21-/m1/s1 Yes check.svgY
  • Key:ACRHBAYQBXXRTO-OAQYLSRUSA-N Yes check.svgY
 X mark.svgNYes check.svgY  (what is this?)    (verify)

Ivabradine, sold under the brand name Procoralan among others, is a medication, which is a pacemaker current (If) inhibitor, used for the symptomatic management of heart-related chest pain and heart failure. Patients who qualify for use of ivabradine for coronary heart failure are patients who have symptomatic heart failure, with reduced ejection volume, and heart rate at least 70 bpm, and the condition not able to be fully managed by beta blockers. [3]

Contents

Ivabradine acts by allowing negative chronotropy in the sinoatrial structure, thus reducing the heart rate via specific inhibition of the pacemaker current. It operates by a mechanism different from that of beta blockers and calcium channel blockers, which are two commonly prescribed antianginal classes of cardiac drugs. Ivabradine has no apparent inotropic properties and may be a cardiotonic agent.

Medical uses

It is used for the symptomatic treatment of chronic stable angina pectoris in patients with normal sinus rhythm who cannot take beta blockers. It is also being used off-label in the treatment of inappropriate sinus tachycardia (IST). [4] Ivabradine stands as a pharmacological option for controlling HR and rhythm without associated side effects in postoperative CABG patients with IST. [5]

Chest pain

Ivabradine is as effective as the beta blocker atenolol and comparable with amlodipine in the management of chronic stable angina, as demonstrated by improvements in total exercise duration in non-inferiority trials, hence it can be an alternative therapy for those who cannot tolerate conventional therapies. [6] [7] In people not sufficiently managed with beta blockers for their angina, adding ivabradine can further reduce heart rate and improve total exercise duration. [8]

Heart failure

It is used in combination with beta blockers in people with heart failure with LVEF lower than 35 percent inadequately controlled by beta blockers alone and whose heart rate exceeds 70 beats per minute. [9] In people not sufficiently managed with beta blockers for their heart failure adding ivabradine decreases the risk of hospitalization for heart failure. [3]

Tachycardia

The clinical use of ivabradine is predicated on its mechanism of action on sinoatrial nodal tissue where it selectively inhibits the funny current (If) and results in a decrease in heart rate. [10]

Ivabradine’s most frequent application in electrophysiology is for the treatment of inappropriate sinus tachycardia. Its use for inappropriate sinus tachycardia is not a European Medicines Agency or Food and Drug Administration approved indication for ivabradine. [10]

It has been used experimentally for the treatment of postural orthostatic tachycardia syndrome in patients with long COVID. [11] It was used for POTS prior to this too. Many cardiologists have found success with this in their POTS patients.

Contraindications

Ivabradine is contraindicated in sick sinus syndrome. It should also not be used concomitantly with potent inhibitors of CYP3A4, including azole antifungals (such as ketoconazole), macrolide antibiotics, nefazodone and the antiretroviral drugs nelfinavir and ritonavir. [12]

Use of ivabradine with verapamil or diltiazem is contraindicated. [13]

Adverse effects

Overall, 14.5% of patients taking ivabradine experience luminous phenomena (by patients described as sensations of enhanced brightness in a fully maintained visual field). This is probably due to blockage of Ih ion channels in the retina, which are very similar to cardiac If. These symptoms are mild, transient, and fully reversible. In clinical studies, about 1% of all patients had to discontinue the drug because of these sensations, which occurred on average 40 days after the drug was started. [6]

In a large clinical trial, bradycardia (unusually slow heart rate) occurred in 2% and 5% of patients taking ivabradine at doses of 7.5 and 10 mg respectively (compared to 4.3% in those taking atenolol). [6] Headaches were reported in 2.6 to 4.8 percent of cases. [6] Other common adverse drug reactions (1–10% of patients) include first-degree AV block, ventricular extrasystoles, dizziness and/or blurred vision. [14]

Mechanism of action

Ivabradine acts on the If (f is for "funny", so called because it had unusual properties compared with other current systems known at the time of its discovery) ion current, which is highly expressed in the sinoatrial node. If is a mixed Na+–K+ inward current activated by hyperpolarization and modulated by the autonomic nervous system. It is one of the most important ionic currents for regulating pacemaker activity in the sinoatrial (SA) node. Ivabradine selectively inhibits the pacemaker If current in a dose-dependent manner. Blocking this channel reduces cardiac pacemaker activity, selectively slowing the heart rate and allowing more time for blood to flow to the myocardium. [15] [16] By inhibiting the If channel, ivabradine reduces the heart rate and workload on the heart. This is relevant in the usage of the medication to treat angina as well as congestive heart failure. This is in contrast to other commonly used rate-reducing medications, such as beta-blockers and calcium channel blockers, which not only reduce heart rate, but also the cardiac contractility. Given the selective decrease in rate without loss of contractility, ivabradine may prove efficacious for treatment of congestive heart failure with reduced ejection fraction.

Ivabradine binds to HCN4 receptors (potassium/sodium hyperpolarization-activated cyclic nucleotide-gated channel 4), utilizing Y506, F509 and I510 residues. [17]

Clinical trials

Coronary artery disease

The BEAUTIFUL study randomised over 10917 patients having stable coronary artery disease and left ventricle dysfunction (ejection fraction < 40%). Ivabradine did not show a significant reduction in the primary composite endpoint of cardiovascular death, admission to hospital for acute myocardial infarction, and admission to hospital for new onset or worsening heart failure. However, in a prespecified subgroup of patients with a baseline heart rate of more than 70 bpm, ivabradine significantly reduced the following secondary endpoints: [18]

These results were seen in combination therapy with beta blockers, and were found to be safe and effective in improving coronary artery disease outcomes in patients with heart rates of 70 bpm or more. [19]

The SIGNIFY trial randomised 19102 patients with stable coronary artery disease and an elevated heart rate greater than 70 beats per minute were assigned to an intervention of ivabradine or placebo in addition to standard therapy. Ivabradine did not significantly improve the secondary outcomes in patient groups, however did demonstrate a reduction in heart rate. When compared to the SHIFT study, a reduction in cardiovascular death or hospital admission was also demonstrated and hence should be considered when additional therapy is in question. [20] [21]

Chronic heart failure

In the SHIFT study, ivabradine significantly reduced the risk of the primary composite endpoint of hospitalization for worsening heart failure or cardiovascular death by 18% (P<0.0001) compared with placebo on top of optimal therapy. [22] These benefits were observed after 3 months of treatment. SHIFT also showed that administration of ivabradine to heart failure patients significantly reduced the risk of death from heart failure by 26% (P=0.014) and hospitalization for heart failure by 26% (P<0.0001). The improvements in outcomes were observed throughout all prespecified subgroups: female and male, with or without beta-blockers at randomization, patients below and over 65 years of age, with heart failure of ischemic or non-ischemic etiology, NYHA class II or class III, IV, with or without diabetes, and with or without hypertension. [23] A 2020 Cochrane review found no difference in cardiovascular mortality and serious adverse events between long-term treatment with ivabradine and placebo/usual care/no treatment in participants with heart failure with a reduced ejection fraction. [24]

A note of caution must be emphasised. Ivabradine, though indicated for chronic heart failure in patients who are clinically stable, is not indicated in acute heart failure where the enhanced heart rate represents cardiac reserve. Indiscriminate use of Ivabradine could destabilise these patients.

Society and culture

Approval

Ivabradine was approved by the European Medicines Agency in 2005, and by the United States Food and Drug Administration in 2015. [25]

Alleged conflict of interest

According to a documentary and article of the Danish media channel TV2 in September 2024, a former president of the European Society of Cardiology during 2006-2008, professor Kim Fox, had a conflict of interest in relation to clinical trials of ivabradine and his recommendation of ivabradine based on the trials. According to TV2, Fox and his partner founded a company, Heart Research Ltd., which performed clinical trials and received payments from the pharmaceutical industry, allowing them to extract a total profit of 500 million DKK (67 million euro) during 2003-2015, mostly from a cooperation with the French pharmaceutical company Servier. According to TV2's research of financial statements of the company, in the period of 2004-2006, the couple received a salary of over 20 million DKK (2.7 million euro) from their company, while during the same period, Kim Fox was chairman of the taskforce recommending ivabradine, and as president of the European Society of Cardiology, he also had the role of presenting the research results and recommending ivabradin as a "gold standard" treatment at a European cardiological conference in 2008. Karsten Juhl Jørgensen, professor of medicine and conflict of interests expert at Odense University and the Nordic Cochrane Centre, [26] commented that the conflict of interest was "probably the largest he had seen". Danish chief physician Niels Holmark Andersen commented that Fox's conflict of interest was of an "oligarchal magnitude" and "the mother of all conflicts of interests" because Fox was involved in all parts of the process, that the clinical results did not sustain claims of the superiority of the medication which has serious adverse effect, and further that Servier had marketed ivabradine "aggressively" and offered physicians exclusive trips to castles in France to promote the medication during the decade of 2000-2010. [27]

Names

It is marketed by Amgen under the brand name Corlanor in the United States, [28] and by Servier in the rest of the world under the brand names Procoralan (worldwide), Coralan (in Hong Kong, Singapore, Australia and some other countries), Corlentor (in Armenia, Spain, Italy and Romania), Lancora (in Canada) and Coraxan (in Russia and Serbia). It is also marketed in India under the brand names Ivabrad, Ivabid. In Iran it's sold under the brand name "bradix" . IVAMAC and Bradia. During its development, ivabradine was known as S-16257.

Related Research Articles

An antianginal is a drug used in the treatment of angina pectoris, a symptom of ischaemic heart disease.

<span class="mw-page-title-main">Angina</span> Chest discomfort due to disorder of the heart muscles

Angina, also known as angina pectoris, is chest pain or pressure, usually caused by insufficient blood flow to the heart muscle (myocardium). It is most commonly a symptom of coronary artery disease.

An antiplatelet drug (antiaggregant), also known as a platelet agglutination inhibitor or platelet aggregation inhibitor, is a member of a class of pharmaceuticals that decrease platelet aggregation and inhibit thrombus formation. They are effective in the arterial circulation where classical Vitamin K antagonist anticoagulants have minimal effect.

<span class="mw-page-title-main">Beta blocker</span> Medications for abnormal heart rhythms

Beta blockers, also spelled β-blockers, are a class of medications that are predominantly used to manage abnormal heart rhythms (arrhythmia), and to protect the heart from a second heart attack after a first heart attack. They are also widely used to treat high blood pressure, although they are no longer the first choice for initial treatment of most patients.

<span class="mw-page-title-main">Interventional cardiology</span> Catheter-based treatment of structural heart diseases

Interventional cardiology is a branch of cardiology that deals specifically with the catheter based treatment of structural heart diseases. Andreas Gruentzig is considered the father of interventional cardiology after the development of angioplasty by interventional radiologist Charles Dotter.

<span class="mw-page-title-main">Diltiazem</span> Calcium channel blocker medication

Diltiazem, sold under the brand name Cardizem among others, is a nondihydropyridine calcium channel blocker medication used to treat high blood pressure, angina, and certain heart arrhythmias. It may also be used in hyperthyroidism if beta blockers cannot be used. It is taken by mouth or given by injection into a vein. When given by injection, effects typically begin within a few minutes and last a few hours.

<span class="mw-page-title-main">Trimetazidine</span> Drug for angina pectoris sold under many brand names

Trimetazidine is a drug sold under many brand names for angina pectoris. Trimetazidine is described as the first cytoprotective anti-ischemic agent developed and marketed by Laboratoires Servier (France). It is an anti-ischemic (antianginal) metabolic agent of the fatty acid oxidation inhibitor class, meaning that it improves the heart muscle's ability to use glucose as a fuel by inhibiting its use of fatty acid metabolism. It has become controversial for its use as a performance-enhancing drug, with several scandals involving its use erupting at successive Olympic games.

<span class="mw-page-title-main">Sinus tachycardia</span> Sinus rhythm with a rate that is higher than normal

Sinus tachycardia is a sinus rhythm of the heart, with an increased rate of electrical discharge from the sinoatrial node, resulting in a tachycardia, a heart rate that is higher than the upper limit of normal.

<span class="mw-page-title-main">Variant angina</span> Cardiac chest pain at any time, not just periods of exertion

Variant angina, also known as Prinzmetal angina,vasospastic angina, angina inversa, coronary vessel spasm, or coronary artery vasospasm, is a syndrome typically consisting of angina. Variant angina differs from stable angina in that it commonly occurs in individuals who are at rest or even asleep, whereas stable angina is generally triggered by exertion or intense exercise. Variant angina is caused by vasospasm, a narrowing of the coronary arteries due to contraction of the heart's smooth muscle tissue in the vessel walls. In comparison, stable angina is caused by the permanent occlusion of these vessels by atherosclerosis, which is the buildup of fatty plaque and hardening of the arteries.

<span class="mw-page-title-main">Carvedilol</span> Blood pressure medication

Carvedilol, sold under the brand name Coreg among others, is a beta blocker medication, that may be prescribed for the treatment of high blood pressure (hypertension) and chronic heart failure with reduced ejection fraction. Beta-blockers as a collective medication class are not recommended as routine first-line treatment of high blood pressure for all patients, due to evidence demonstrating less effective cardiovascular protection and a less favourable safety profile when compared to other classes of blood pressure-lowering medications.

<span class="mw-page-title-main">Perindopril</span> High blood pressure medication

Perindopril is a medication used to treat high blood pressure, heart failure, or stable coronary artery disease. As a long-acting ACE inhibitor, it works by relaxing blood vessels and decreasing blood volume. As a prodrug, perindopril is hydrolyzed in the liver to its active metabolite, perindoprilat. It was patented in 1980 and approved for medical use in 1988.

The pacemaker current is an electric current in the heart that flows through the HCN channel or pacemaker channel. Such channels are important parts of the electrical conduction system of the heart and form a component of the natural pacemaker.

<span class="mw-page-title-main">Multifocal atrial tachycardia</span> Fast heart rhythm associated with exacerbations of COPD

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The following outline is provided as an overview of and topical guide to cardiology, the branch of medicine dealing with disorders of the human heart. The field includes medical diagnosis and treatment of congenital heart defects, coronary artery disease, heart failure, valvular heart disease and electrophysiology. Physicians who specialize in cardiology are called cardiologists.

<span class="mw-page-title-main">Landiolol</span> Chemical compound

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<span class="mw-page-title-main">Coronary ischemia</span> Medical condition

Coronary ischemia, myocardial ischemia, or cardiac ischemia, is a medical term for abnormally reduced blood flow in the coronary circulation through the coronary arteries. Coronary ischemia is linked to heart disease, and heart attacks. Coronary arteries deliver oxygen-rich blood to the heart muscle. Reduced blood flow to the heart associated with coronary ischemia can result in inadequate oxygen supply to the heart muscle. When oxygen supply to the heart is unable to keep up with oxygen demand from the muscle, the result is the characteristic symptoms of coronary ischemia, the most common of which is chest pain. Chest pain due to coronary ischemia commonly radiates to the arm or neck. Certain individuals such as women, diabetics, and the elderly may present with more varied symptoms. If blood flow through the coronary arteries is stopped completely, cardiac muscle cells may die, known as a myocardial infarction, or heart attack.

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