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Related Concept Videos

Cardiomyopathy III: Hypertrophic Cardiomyopathy01:29

Cardiomyopathy III: Hypertrophic Cardiomyopathy

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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 V: Interprofessional Care01:29

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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 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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Tumor Progression

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Tumor progression is a phenomenon where the pre-formed tumor acquires successive mutations to become clinically more aggressive and malignant. In the 1950s, Foulds first described the stepwise progression of cancer cells through successive stages.
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The heart's primary function is to pump blood throughout the body, maintaining a balance between blood sent out (cardiac output) and blood returning (venous return). If this balance is disrupted, it can result in congestive heart failure (CHF), a severe condition where the heart becomes an inefficient pump, leading to inadequate blood circulation.
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Assessment: Nursing management of patients with cardiomyopathy begins with a thorough assessment of the patient's history, including a family history of cardiomyopathy or sudden cardiac death, personal history of heart disease, hypertension, diabetes, and any alcohol consumption or drug use.During the physical examination, assess vital signs, look for signs of heart failure (such as edema, jugular venous distention, and cyanosis), auscultate for abnormal heart sounds (like murmurs and gallops),...
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Benefits of Cardiac Resynchronization Therapy in an Asynchronous Heart Failure Model Induced by Left Bundle Branch Ablation and Rapid Pacing
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Tumor Growth Ameliorates Cardiac Dysfunction.

Lama Awwad1, Rona Shofti2, Tali Haas2

  • 1Department of Cell Biology and Cancer Science, Ruth and Bruce Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, Haifa 3525422, Israel.

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Summary

Cancer progression surprisingly improves heart function during pressure overload. Tumors promote beneficial M1-to-M2 macrophage polarization in the heart, reducing cardiac hypertrophy and fibrosis, but this effect requires functional macrophages.

Keywords:
cardiac fibrosiscardiac hypertrophyheart failureimmune systemmacrophage polarizationtumor

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Area of Science:

  • Cardiovascular Biology
  • Oncology
  • Immunology

Background:

  • Heart failure and cancer are leading global causes of mortality.
  • Cardiac dysfunction is known to exacerbate cancer progression and metastasis.
  • The impact of tumor progression on cardiac remodeling remains largely unexplored.

Purpose of the Study:

  • To investigate the effects of tumor progression on cardiac remodeling under pressure overload.
  • To identify the mechanisms by which tumors influence cardiac adaptation to stress.

Main Methods:

  • Utilized a transverse aortic constriction (TAC) mouse model to induce pressure overload.
  • Introduced proliferating cancer cells (two different lines) into TAC-operated mice.
  • Performed integrative analysis including qRT-PCR, flow cytometry, and immunofluorescence.

Main Results:

  • Tumor-bearing mice exhibited reduced cardiac hypertrophy and fibrosis following TAC.
  • Cardiac contractile function was improved in tumor-bearing mice post-TAC.
  • Tumor-dependent M1-to-M2 macrophage polarization in the heart mediated these beneficial effects.
  • Macrophage depletion abolished the protective effects of tumors on cardiac function and fibrosis.

Conclusions:

  • Tumor progression can beneficially modulate cardiac remodeling in response to pressure overload.
  • Cardiac macrophage polarization is a key mechanism linking cancer and improved cardiac outcomes.
  • Targeting cardiac macrophages may offer novel therapeutic strategies for heart failure patients with cancer.