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Related Concept Videos

Cardiomyopathy V: Interprofessional Care01:29

Cardiomyopathy V: Interprofessional Care

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Managing cardiomyopathy involves addressing underlying or precipitating causes, treating heart failure with medications, and implementing dietary changes and a balanced exercise and rest regimen.Lifestyle ModificationsCardiomyopathy patients should adopt a low-sodium diet to reduce fluid retention and manage heart failure. A personalized exercise and rest plan helps maintain physical fitness without overstraining the heart. Avoiding alcohol and tobacco is essential to prevent further damage to...
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Myocarditis: Comprehensive Medical ManagementMyocarditis, the heart muscle inflammation, requires a comprehensive medical management strategy that addresses the underlying cause, provides supportive care, manages symptoms, and reduces cardiac workload.Infections and Autoimmune CausesAdminister appropriate antimicrobial therapy when an infectious agent causes myocarditis. For instance, penicillin treats infections caused by Group A Streptococcus. In cases where autoimmune processes are...
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Acute Coronary Syndrome (ACS) encompasses a spectrum of heart conditions caused by sudden obstruction of coronary arteries, typically resulting from the rupture of an atherosclerotic plaque and subsequent thrombus (blood clot) formation. This obstruction can lead to partial or complete blockage of blood flow, causing varying degrees of myocardial ischemia or infarction.ACS includes the following clinical entities:Unstable Angina (UA)Non-ST-Elevation Myocardial Infarction (NSTEMI)ST-Elevation...
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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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Related Experiment Video

Updated: Apr 18, 2026

Delayed Intramyocardial Delivery of Stem Cells after Ischemia Reperfusion Injury in a Murine Model
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Transmyocardial revascularization devices: technology update.

Bogdan A Kindzelski1, Yifu Zhou1, Keith A Horvath1

  • 1Cardiothoracic Surgery Research Program, National Heart, Lung and Blood Institute, National Institutes of Health, Bethesda, MD, USA.

Medical Devices (Auckland, N.Z.)
|January 8, 2015
PubMed
Summary
This summary is machine-generated.

Transmyocardial laser revascularization (TMR) offers a safe and effective treatment for diffuse coronary artery disease. This procedure improves angina symptoms and myocardial perfusion, primarily through stimulating new blood vessel formation (angiogenesis).

Keywords:
angiogenesiscoronary artery diseaselaserrevascularization

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Area of Science:

  • Cardiovascular Surgery
  • Medical Technology
  • Regenerative Medicine

Background:

  • Transmyocardial laser revascularization (TMR) is an option for patients with diffuse coronary artery disease unsuitable for traditional revascularization.
  • The procedure involves creating laser channels in ischemic heart muscle to enhance blood flow.
  • Two FDA-approved lasers, holmium:yttrium-aluminum-garnet and CO2, are used, differing in energy, wavelength, and tissue interaction.

Purpose of the Study:

  • To review the two approved laser devices for TMR.
  • To present evidence on the safety and efficacy of TMR.
  • To discuss future directions for TMR technology.

Main Methods:

  • Review of clinical studies and data on TMR procedures.
  • Comparison of holmium:yttrium-aluminum-garnet and CO2 laser devices.
  • Analysis of outcomes including angina relief, quality of life, and myocardial perfusion.

Main Results:

  • Over 50,000 TMR procedures have been performed globally.
  • TMR has demonstrated improvements in angina stages, quality of life, and myocardial perfusion.
  • Evidence suggests angiogenesis (new blood vessel formation) is a key mechanism for TMR's benefits.

Conclusions:

  • TMR is a safe and effective therapy for long-term angina relief, used alone or with bypass grafting.
  • The choice of laser device may influence TMR efficacy.
  • Further research into TMR technology holds promise for treating ischemic heart disease.