[Septic circulatory shock and septic cardiomyopathy]

Area of Science:

• Cardiology
• Intensive Care Medicine
• Pathophysiology

Context:

• Septic shock presents complex cardiovascular challenges beyond mere circulatory collapse.
• Septic cardiomyopathy, a distinct cardiac impairment, is a key feature of septic shock.
• Understanding the multifaceted nature of septic shock is crucial for effective patient management.

Purpose:

• To elucidate the pathophysiology of septic shock, emphasizing its dual role as circulatory and cardiac shock.
• To define and quantify septic cardiomyopathy and its relationship to circulatory shock parameters.
• To explore the etiological factors contributing to septic cardiomyopathy and impaired cardiac regulation.

Summary:

• Septic shock encompasses circulatory and cardiac dysfunction (septic cardiomyopathy), marked by heterogeneous cardiac function reduction and impaired demand-oriented regulation.
• Bacterial toxins, inflammatory mediators, disseminated intravascular coagulopathy, and endotoxin-I(f) current interactions contribute to these cardiac disturbances.
• Quantification involves measuring systemic vascular resistance for circulatory shock and relative cardiac output to afterload for septic cardiomyopathy.

Impact:

• Severity of both circulatory and cardiac impairment in septic shock correlates with patient prognosis.
• Current treatments for septic shock and cardiomyopathy are primarily symptomatic.
• Further research into causal therapies for septic shock and septic cardiomyopathy is ongoing.