Clinical snapshot
70-year-old man with heart failure and diabetes.
BP 86/52, HR 110, RR 28, SpO₂ 92% on 4 L NC, T 38.8°C, lactate 6.1, urine 10 mL/hr.
POCUS: IVC full/non-collapsing, LV small & hyperdynamic, bilateral B-lines, VExUS 3, LVOT VTI 14 cm.
The original discussion also describes warm, flushed skin. These findings warrant urgent treatment for suspected sepsis with congestion, while the hemodynamic mechanism is clarified. The supplied snapshot contains no fluid-treatment chronology, measured cardiac output, confirmed infection source, or subsequent outcome. The plan below is a bedside approach, not a report of what happened next.
What’s going on?
Pressure, forward flow, and congestion are different questions. Mixed cardiogenic–vasodilatory shock requires cardiac dysfunction and vasodilation contributing to hypoperfusion. Heart failure, warmth, and congestion do not establish that combination. Skin warmth does not measure vascular resistance. EF is load-dependent: a hyperdynamic LV can eject a small stroke volume; low EF alone does not establish cardiogenic shock. Assess both ventricles, valves, filling, rhythm, and response. ACC shock guidance.
But Now Look at the Ultrasound
VTI is a distance, not cardiac output. Stroke volume requires LVOT area × VTI; cardiac output additionally requires heart rate. Thus, 14 cm merits attention but is not an inotrope trigger. Repeat a technically reliable tracing with consistent alignment, sample position, and suitable beat averaging. Changing heart rate or acquisition can change interpretation; small differences may be measurement noise. Measurement study.
A full IVC and VExUS 3 support venous congestion when acquisition and interpretation are sound. They do not prove total-body volume excess or fluid responsiveness. The original VExUS study associated severe congestion with postoperative AKI; it did not validate a shock classifier or show that score-driven diuresis improves survival.
The Conflict
A patient may be fluid responsive yet poorly tolerant of fluid. Responsiveness asks whether preload increases stroke volume; tolerance weighs benefit against congestion. Here, pause automatic large boluses and check prior treatment. Consider an appropriate dynamic test, such as passive leg raising with reliable flow measurement. Define benefit and stopping criteria. Neither LV appearance nor IVC size answers this alone. ESICM monitoring guidance.
Immediate bedside plan :
Treat hypoxemia and suspected infection in parallel with circulatory support: cultures without delaying antibiotics, prompt source control, monitoring, and critical-care involvement. Norepinephrine is a reasonable initial pressor here; escalating requirements may justify adding vasopressin. In this 70-year-old, SSC 2026 conditionally suggests an initial MAP of 60–65 mmHg; individualize against perfusion and adverse effects. Persistent hypoperfusion with cardiac dysfunction despite appropriate volume status and pressure may justify dobutamine with norepinephrine, or epinephrine alone. These are conditional options, not a low-VTI recipe. SSC 2026.
Do not reflexively add an inotrope to a small hyperdynamic LV. Look for systolic anterior mitral motion, mitral regurgitation, and a late-peaking Doppler gradient suggesting dynamic LVOT or mid-cavity obstruction. Confirm with expert echocardiography. Excess adrenergic stimulation and reduced filling can aggravate obstruction. Adjust preload and afterload carefully, reduce aggravating inotropy when feasible, and reserve any beta-blocker for selected, closely monitored specialist management because hemodynamics can deteriorate. The congested presentation makes automatic fluid loading particularly unsafe. Septic-shock obstruction study.
Focused ultrasound re-scan checklist :
Heart: Reassess LV and RV performance, valves, pericardium, and forward-flow trends. A limited scan cannot exclude important disease; obtain comprehensive echocardiography when the mechanism remains unclear. Repeat after an intervention or deterioration, not merely once daily. Persistent shock warrants arterial-pressure monitoring and, when needed, more direct flow assessment.
Veins: Recheck Doppler quality and the clinical context, including right-heart disease and ventilatory conditions. Follow congestion alongside pressure, urine output, kidney function, and treatment response; do not chase a VExUS grade in isolation.
Lungs: Bilateral B-lines indicate an interstitial pattern, not its cause. Pleural irregularity, spared areas, or subpleural consolidation may favor inflammatory disease, but hydrostatic and permeability edema can coexist. Integrate lungs with cardiac findings and clinical history. Primary diagnostic study.
How I’d sequence care :
Reassess within minutes while supporting perfusion and breathing and identifying the cause. Obtain an ECG and urgently investigate ischemia, acute valve disease, RV failure/PE, or obstruction when suggested by the findings. Deterioration despite initial support should trigger the shock/critical-care team, definitive imaging or invasive hemodynamic assessment as appropriate, and early discussion of transfer or selected mechanical support. Do not delay revascularization, drainage, or another time-critical treatment.
Once beyond acute resuscitation, clinically important congestion may justify active fluid removal. A transiently acceptable MAP is insufficient: assess ongoing volume needs, vasopressor trajectory, and organ perfusion. Titrate removal to tolerance; refractory congestion or established kidney-replacement indications need specialist review. Creatinine rise alone does not mandate ultrafiltration.
Pearls & pitfalls
Lactate is a warning and a trend, not a direct flow meter. Interpret it alongside mentation, capillary refill, urine output, and the clinical course; adrenergic production and impaired clearance can contribute. Do not give repeated fluid merely to normalize lactate.
The ANDROMEDA-SHOCK-2 trial supports structured, personalized reassessment rather than chasing one number. Its capillary-refill-targeted strategy improved a hierarchical composite outcome, mainly through shorter organ support. It does not establish that a VExUS/VTI combination, or this proposed sequence, improves survival.
Watch the response to treatment itself: vasoconstriction can raise pressure without restoring adequate flow; inotropes can cause tachyarrhythmia or worsen obstruction. Respiratory support must fit oxygenation, work of breathing, airway needs, and hemodynamics. Positive pressure may relieve hydrostatic edema but worsen venous return or RV loading; prepare for peri-intubation deterioration.
Take-home messages :
The working diagnosis is suspected sepsis with congestion. Clarify the flow limitation before labeling mixed shock. Choose treatment from pressure, perfusion, and tolerance together; POCUS informs that decision.
