Ranolazine treatment for myocardial infarction? Effects on the development of necrosis, left ventricular function and

Sharon L Hale1, Robert A Kloner

  • 1The Heart Institute, Good Samaritan Hospital, 1225 Wilshire Blvd, Los Angeles, CA, 90017, USA, sharon.hale@netscape.com.

Insights

Ranolazine, a cardiac late sodium current (late INa) inhibitor, shows promise in reducing heart damage after myocardial infarction. Animal studies demonstrate its potential to improve outcomes following ischemia and reperfusion injury.

Area of Science:

  • Cardiology
  • Pharmacology
  • Translational Medicine

Background:

  • Ranolazine is a clinically approved treatment for chronic angina.
  • The cardiac late sodium current (late INa) contributes to myocardial ischemia-reperfusion injury.
  • Targeting late INa offers a potential therapeutic strategy for myocardial infarction.

Purpose of the Study:

  • To review in vivo animal studies on ranolazine's effects in myocardial ischemia and reperfusion.
  • To evaluate ranolazine's efficacy in ameliorating consequences of myocardial infarction.

Main Methods:

  • Focus on data from experimental animal models of myocardial ischemia and reperfusion.
  • Analysis of studies investigating ranolazine's impact on infarct size, cardiac function, and arrhythmias.

Main Results:

  • Ranolazine reduced myocardial infarct size in animal models.
  • Improved left ventricular function was observed post-ischemia/reperfusion.
  • Ranolazine decreased ischemia/reperfusion-induced arrhythmias and improved heart failure outcomes.

Conclusions:

  • Ranolazine demonstrates cardioprotective effects in preclinical models of myocardial infarction.
  • Inhibition of late INa by ranolazine is a viable therapeutic approach for ischemia-reperfusion injury.
  • Further investigation into ranolazine's role in acute cardiac events is warranted.

Related Concept Videos

Antianginal Drugs: Calcium Channel Blockers and Ranolazine01:25

Antianginal Drugs: Calcium Channel Blockers and Ranolazine

Angina pectoris, a primary symptom of ischemic heart disease, requires careful pharmacological interventions. In this context, calcium channel blockers (CCBs) and ranolazine have emerged as crucial pharmacotherapeutic agents, providing deep insights into the complexities of angina management.
CCBs, a diverse class that includes dihydropyridines (nifedipine) and diphenylalkylamines (verapamil and diltiazem), exert their effect by blocking calcium channels in cardiac and smooth muscle cells. This...
1.8K
Antiarrhythmic Drugs: Class I Agents as Sodium Channel Blockers01:22

Antiarrhythmic Drugs: Class I Agents as Sodium Channel Blockers

Class I antiarrhythmic drugs are used to treat various types of arrhythmias or irregular heart rhythms. These drugs block the sodium (Na+) channels in the cardiac cells, thereby affecting the movement of electrical impulses across the heart. Class I antiarrhythmic drugs are divided into three subgroups: Class IA, Class IB, and Class IC, each with distinct mechanisms of action and effects on the heart.
Class 1A Antiarrhythmic Drugs: These drugs work by moderately blocking sodium channels,...
4.2K
Antiarrhythmic Drugs: Class III Agents as Potassium Channel Blockers01:12

Antiarrhythmic Drugs: Class III Agents as Potassium Channel Blockers

Class III antiarrhythmic drugs are a group of medications that can prolong action potentials in the heart. They achieve this by blocking potassium channels or enhancing inward currents from sodium channels. However, these drugs have a unique property of "reverse use-dependence," which is most pronounced at slower heart rates and can lead to torsades de pointes—a specific type of arrhythmia. However, it is essential to note that excessive QT interval prolongation—a measure of...
2.9K
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...
2.3K
Heart Failure Drugs: Inotropic Agents01:26

Heart Failure Drugs: Inotropic Agents

Positive inotropic agents are commonly used as the first line of treatment for heart failure. One such agent is digoxin, derived from the genus Digitalis, which has been known for centuries but effectively utilized since 1785. However, these cardiac glycosides can have potentially toxic effects due to their mechanism of action, which involves inhibiting Na+/K+-ATPase and increasing contractility. Digoxin is absorbed orally and distributed in various tissues, including the CNS. It has a long...
1.9K
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...
1.7K