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Related Concept Videos

Myocarditis I: Introduction01:21

Myocarditis I: Introduction

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Myocarditis is inflammation of the myocardium, which is the muscular layer of the heart.EtiologyMyocarditis has a diverse etiology, including a wide range of infectious and non-infectious causes:Infectious CausesViral: Common viruses include Coxsackie A and B, adenovirus, parvovirus B19, enteroviruses, and influenza A.Bacterial: Examples include infections caused by Streptococcus, Staphylococcus, and Mycoplasma species.Rickettsial: Infections like Rocky Mountain spotted fever can result in...
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Myocarditis II: Clinical Features and Diagnostic Tests01:27

Myocarditis II: Clinical Features and Diagnostic Tests

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Myocarditis is an inflammation of the heart muscle. The symptoms vary widely, encompassing asymptomatic presentations to severe, acute manifestations.Clinical PresentationAsymptomatic cases: In some instances, myocarditis may be asymptomatic, with the infection resolving without intervention. These cases often go undetected unless discovered incidentally through diagnostic imaging or tests conducted for other reasons.General Early Symptoms: Early symptoms of myocarditis are non-specific and can...
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Myocarditis III: Medical Management01:14

Myocarditis III: Medical Management

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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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Myocarditis IV: Nursing Management01:22

Myocarditis IV: Nursing Management

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Myocarditis is an inflammatory condition of the myocardium requiring meticulous nursing management for optimal patient outcomes. Effective management begins with a thorough assessment of the patient's medical history, paying close attention to past infections, autoimmune disorders, travel history, and exposure to toxins or drugs. Recent viral infections and systemic diseases are particularly relevant due to their potential role in triggering myocarditis.Physical Examination and MonitoringThe...
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Rheumatic Heart Disease I: Introduction01:23

Rheumatic Heart Disease I: Introduction

990
Rheumatic heart disease or RHD is a chronic condition that results from rheumatic fever, causing permanent damage to the heart valves.Etiology and Risk FactorsIt primarily arises from rheumatic fever, an inflammatory disease that can develop after untreated or inadequately treated group A streptococcal (GAS) pharyngitis. Streptococcus spreads through direct contact with oral or respiratory secretions. While the bacteria are the causative agents, factors like malnutrition, overcrowding, poor...
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Imbalances in Cardiac Output01:26

Imbalances in Cardiac Output

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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.
CHF can occur due to the failure of either side of the heart. Left-side failure leads to pulmonary congestion—the right side continues to send...
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Related Experiment Video

Updated: Apr 17, 2026

Delayed Intramyocardial Delivery of Stem Cells after Ischemia Reperfusion Injury in a Murine Model
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Aging and the intramyocardial inflammatory response.

Keith R Walley

    Critical Care (London, England)
    |February 13, 2015
    PubMed
    Summary

    Sepsis causes heart dysfunction partly due to monocyte chemoattractant protein-1, which affects immune cells in the heart. This effect is more pronounced in older individuals, highlighting a potential age-related vulnerability in sepsis.

    Area of Science:

    • Cardiovascular Science
    • Immunology
    • Sepsis Pathophysiology

    Background:

    • Sepsis triggers an intramyocardial inflammatory response, leading to reduced ventricular function and myocardial damage.
    • Monocyte chemoattractant protein-1 (MCP-1) is implicated in retaining mononuclear leukocytes within the heart during endotoxemic shock.
    • The impact of MCP-1 on ventricular dysfunction during sepsis is notably age-dependent.

    Purpose of the Study:

    • To elucidate the role of MCP-1 in the pathway of sepsis-induced ventricular dysfunction.
    • To investigate the reasons behind the age-dependent nature of this effect.
    • To understand the implications for managing older sepsis patients.

    Main Methods:

    • Utilized a mouse model of endotoxemic shock.

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  • Investigated the inflammatory response within the myocardium.
  • Focused on the role of monocyte chemoattractant protein-1 (MCP-1).
  • Analyzed age-related differences in cardiac function and inflammation.

    • Main Results:

    • Sepsis-induced inflammation in the heart leads to impaired ventricular function.
    • MCP-1 contributes to the accumulation of leukocytes in the heart, exacerbating dysfunction.
    • The detrimental effects of MCP-1 on cardiac function during sepsis are significantly more pronounced in older mice.

    Conclusions:

    • MCP-1 plays a critical role in sepsis-induced myocardial inflammation and subsequent ventricular dysfunction.
    • Age is a significant factor influencing the severity of cardiac dysfunction in sepsis, mediated by MCP-1.
    • Findings suggest a need for age-specific therapeutic strategies targeting MCP-1 in sepsis patients.