Management of Cardiogenic Shock and Severe Congestive Heart Failure

Definitions and Diagnostic Criteria

The American College of Cardiology defines cardiogenic shock as hypotension (SBP <90 mmHg for >30 minutes or MAP <60 mmHg) despite adequate filling status, with signs of hypoperfusion 2
Cardiogenic shock is characterized by tissue hypoperfusion: altered mental status, cold extremities, livedo reticularis, urine output <30 mL/h, and elevated lactate levels 2
The European Society of Cardiology states that hemodynamic criteria for cardiogenic shock include cardiac index <2.2 L/min/m² and pulmonary capillary wedge pressure >15 mmHg 2
Severe congestive heart failure is often presents with pulmonary edema, peripheral edema, and elevated filling pressures without necessarily having hypotension 1

The Society for Cardiovascular Angiography and Interventions (SCAI) recommends immediate comprehensive assessment with ECG and echocardiography in cardiogenic shock 1, 2
Invasive monitoring with arterial line is recommended for accurate blood pressure measurement in cardiogenic shock 1
Early invasive hemodynamic assessment with pulmonary artery catheter is often needed to identify the specific shock phenotype in cardiogenic shock 1
The European Heart Journal recommends assessing volume status and congestion in severe congestive heart failure 3

The American Heart Association recommends fluid challenge (>200 ml/15-30 min) as first-line treatment if no signs of overt fluid overload in cardiogenic shock 4, 1
Norepinephrine is the preferred first-line vasopressor when mean arterial pressure needs support in cardiogenic shock 1
Dobutamine (2-20 μg/kg/min) is recommended as first-line inotropic agent to increase cardiac output in cardiogenic shock 1, 2
Diuretics are the cornerstone of treatment to reduce congestion in severe congestive heart failure 3

The European Heart Journal does not recommend routine use of intra-aortic balloon pump (IABP) in cardiogenic shock 1
Device selection should be tailored to the specific ventricular failure pattern (LV, RV, or biventricular) in cardiogenic shock 1
Mechanical support is generally not first-line therapy in severe congestive heart failure 3
Ultrafiltration may be considered in patients who fail to respond to diuretic-based strategies in severe congestive heart failure 3

The American College of Cardiology recommends considering dobutamine or milrinone to improve cardiac output in LV-dominant shock 1
The European Society of Cardiology recommends considering agents that increase systemic afterload without increasing pulmonary vascular resistance in RV-dominant shock 1
Combination therapy tailored to hemodynamic parameters is recommended in biventricular shock 1
Vasodilators like nitroprusside may be considered to improve cardiac output by reducing afterload in normotensive hypoperfusion 5, 1

Transfer to a tertiary care center with 24/7 cardiac catheterization capability and mechanical circulatory support availability is recommended for cardiogenic shock 1, 2
Implementation of a multidisciplinary shock team approach is beneficial for complex cases of cardiogenic shock 1
Development of shock networks with regionalized systems of care is recommended for cardiogenic shock 1
Multidisciplinary heart failure team involvement is beneficial in severe congestive heart failure 4