Viral pathogens, such as influenza and severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), can also induce a cytokine storm reminiscent of bacterial sepsis, highlighting that the shock etiology extends beyond traditional bacterial paradigms. Additionally, patients with inherent immunodeficiencies or those on immunosuppressive therapies, such as chemotherapy or corticosteroids, have a diminished capacity to contain the infection, allowing the etiology to progress unchecked to the vascular stage.
Understanding Myocardial Depression in Septic Shock Etiology
Furthermore, underlying health conditions significantly modify the shock etiology. Fungal infections, particularly in immunocompromised hosts, can lead to similar hemodynamic collapse.
Bacterial Sources Gram-negative bacteria, such as *Escherichia coli* and *Klebsiella pneumoniae*, are notorious for releasing endotoxins like lipopolysaccharide (LPS), which trigger a massive cytokine release. This specific subset is characterized by persistent hypotension requiring vasopressors to maintain a mean arterial pressure of 65 mmHg or greater and having a serum lactate level greater than 2 mmol/L despite adequate volume resuscitation.
Understanding Myocardial Depression in Septic Shock Etiology
The Role of Immune Dysregulation The transition from infection to shock is mediated by the immune system's failure to maintain homeostasis. Certain primary sites are statistically more likely to lead to the hemodynamic instability characteristic of shock.
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