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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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Cardiomyopathy III: Hypertrophic Cardiomyopathy01:29

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Hypertrophic cardiomyopathy, or HCM, is an autosomal dominant genetic disorder characterized by asymmetric left ventricular hypertrophy without ventricular dilation. It is more common in men and is typically diagnosed in young, athletic adults.EtiologyHCM is primarily genetic and is caused by mutations in genes encoding sarcomeric proteins. Researchers have identified over 1400 mutations across at least 11 different genes. Among these, the most frequently occurring mutations are found in the...
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Cardiomyopathy II: Dilated Cardiomyopathy01:30

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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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Cardiomyopathy VII: Pre and Post Operative Nursing Management01:28

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Patients with hypertrophic cardiomyopathy (HCM) and left ventricular outflow tract (LVOT) obstruction who remain symptomatic despite optimal medical therapy may undergo a septal myectomy (Morrow procedure). This procedure involves excising a portion of the hypertrophied septum below the aortic valve using a heart-lung machine to improve blood flow through the LVOT. Effective preoperative and postoperative nursing management ensures successful patient outcomes, minimizes complications, and...
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Related Experiment Video

Updated: Mar 9, 2026

Post-Myocardial Infarction Heart Failure in Closed-chest Coronary Occlusion/Reperfusion Model in Göttingen Minipigs and Landrace Pigs
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Bilateral sympathectomy improves postinfarction left ventricular remodeling and function.

Fernando Luiz Zanoni1, Rafael Simas1, Raphael Grillo da Silva1

  • 1Laboratory of Cardiovascular Surgery and Pathophysiology of Circulation, Heart Institute (Incor), Department of Cardiopneumology, Sao Paulo University Medical School, Sao Paulo, Brazil.

The Journal of Thoracic and Cardiovascular Surgery
|December 22, 2016
PubMed
Summary

Bilateral sympathectomy, unlike left sympathectomy, preserved heart function and reduced adverse remodeling after myocardial infarction in rats. This suggests bilateral sympathectomy is a promising therapeutic strategy for post-heart attack recovery.

Keywords:
extracellular matrixsympathectomyventricular remodeling

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Area of Science:

  • Cardiovascular Research
  • Surgical Interventions
  • Cardiac Physiology

Background:

  • Myocardial infarction (MI) leads to detrimental left ventricular (LV) remodeling and dysfunction.
  • The role of the sympathetic nervous system in post-MI cardiac remodeling is complex and warrants further investigation.

Purpose of the Study:

  • To investigate the impact of left versus bilateral sympathectomy on LV remodeling and function following experimental myocardial infarction in a rat model.

Main Methods:

  • Rats underwent myocardial infarction induction via coronary artery ligation.
  • Groups included MI, MI with left sympathectomy, MI with bilateral sympathectomy, and sham controls.
  • LV function, infarct size, fibrosis, matrix metalloproteinases, and inflammatory markers were assessed after 8 weeks.

Main Results:

  • Bilateral sympathectomy maintained end-diastolic volume and preserved ejection fraction compared to the MI and left sympathectomy groups.
  • Cardiac function, including ejection fraction, improved significantly with dobutamine challenge only in the bilateral sympathectomy group.
  • Fibrosis and matrix metalloproteinase expression were reduced, and LV wall thickness was maintained in the bilateral sympathectomy group.

Conclusions:

  • Bilateral sympathectomy effectively attenuated adverse left ventricular remodeling post-myocardial infarction.
  • This surgical approach preserved systolic function, highlighting its potential therapeutic benefit in managing heart attack consequences.