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Related Concept Videos

Heart Failure Drugs: Inotropic Agents01:26

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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...
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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...
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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...
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The normal cardiac rhythm is a synchronized electrical activity that facilitates the regular and coordinated contraction of the heart muscle. This process is essential for efficient blood circulation throughout the body. The fundamental elements involved in establishing and maintaining this rhythm include the unique electrical properties of cardiac muscle cells, the sinoatrial (SA) node's pacemaker function, the specialized conducting system, and the ionic mechanisms underlying each phase...
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Dilated cardiomyopathy, or DCM, is a progressive myocardial disorder characterized by ventricular chamber dilation and contractile dysfunction.EtiologyVarious factors can cause DCM, including hypertension and heavy alcohol intake, which contribute to the weakening and enlargement of the heart muscle. Viral infections, such as Coxsackievirus B, adenoviruses, and influenza, can lead to DCM by causing inflammation and damage to heart tissue. Certain chemotherapeutic agents, including daunorubicin,...
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Therapeutic Drug Monitoring (TDM) is a clinical practice that measures specific drug levels in a patient's blood or body tissues to tailor drug therapy effectively. This monitoring is critical for managing drugs with narrow therapeutic indices like digoxin and phenytoin, ensuring they are both safe and effective. For instance, monitoring theophylline levels in asthma patients involves precision and sensitivity to adjust doses according to individual responses to therapy, ensuring efficacy and...
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Optocardiography and Electrophysiology Studies of Ex Vivo Langendorff-perfused Hearts
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Digoxin: The Art and Science.

Gordon A Ewy1

  • 1Emeritus Professor of Medicine (Cardiology), Emeritus Director of the University of Arizona Sarver Heart Center, University of Arizona College of Medicine, Tucson.

The American Journal of Medicine
|July 11, 2015
PubMed
Summary
This summary is machine-generated.

Digoxin

Keywords:
Supraventricular arrhythmiasSystolic heart failure

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Area of Science:

  • Cardiology
  • Pharmacology

Background:

  • Digoxin is a cardiac glycoside used for heart failure and arrhythmias.
  • Its therapeutic use, particularly in systolic heart failure and supraventricular tachycardias, remains a subject of debate.
  • Understanding its benefits and risks is crucial for clinical decision-making.

Purpose of the Study:

  • To review the current understanding of digoxin's efficacy and safety.
  • To provide evidence-based information for physicians.
  • To aid in the therapeutic considerations for digoxin in specific cardiovascular conditions.

Main Methods:

  • Literature review of existing studies and clinical trials.
  • Analysis of pharmacological properties and clinical applications of digoxin.
  • Synthesis of current evidence regarding digoxin's role in cardiovascular therapy.

Main Results:

  • Digoxin has a complex role in managing certain heart conditions.
  • Evidence suggests potential benefits in specific patient populations, but risks must be considered.
  • The review consolidates information on its controversial therapeutic applications.

Conclusions:

  • Physicians require comprehensive data to judiciously prescribe digoxin.
  • The decision to use digoxin involves balancing its controversial benefits against potential adverse effects.
  • Further research may clarify optimal use cases for digoxin in cardiovascular medicine.