10/09/2026
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Cardiogenic Shock
āĻāĻāĻāύ unconscious patient emergency-āϤ⧠āĻāϏāϞāĨ¤
đ O/E:
đģ BP: Low / not recordable
đģ Pulse: Feeble / difficult to detect
đģ Peripheral extremities: Cold & clammy
đģ SpOâ: Very low
đĩ Chest examination: Bi-basal crepitations present â suggests pulmonary congestion/edema.
đĩ History of IHD/ACS may raise suspicion of cardiogenic shock, but acute MI/ACS must be confirmed with ECG, cardiac biomarkers and clinical assessment.
đ First think â Is this really cardiogenic shock?
Shock-āĻāϰ āĻ
āύā§āϝ common causes-āĻā§āϞā§āĻ rapidly exclude āĻāϰāϤ⧠āĻšāĻŦā§:
âī¸ No significant fluid loss / bleeding / severe GI loss
â Hypovolemic shock less likely.
âī¸ No clear history of infection + no supportive clinical features
â Septic shock less likely.
âī¸ CBG normal
â Hypoglycaemia is not the explanation for the altered consciousness.
â ī¸ āϤāĻŦā§ āĻļā§āϧ⧠history āĻĻāĻŋā§ā§ septic/hypovolemic shock completely exclude āĻāϰāĻž āϝāĻžāĻŦā§ āύāĻžāĨ¤ Examination, investigations and response to initial management āĻĻāϰāĻāĻžāϰāĨ¤
đ¨ Key point
Hypotension + cold/clammy periphery + pulmonary congestion + known/suspected cardiac disease â Cardiogenic shock strongly consider āĻāϰā§āύ.
āĻāĻ āĻ
āĻŦāϏā§āĻĨāĻžā§ ECG + bedside Echo/POCUS urgently āĻāϰāĻž āĻāĻāĻŋāϤ, āϝāĻĻāĻŋ available āĻĨāĻžāĻā§āĨ¤ Echo āĻĻāĻŋā§ā§ LV/RV function, regional wall-motion abnormality, volume status-āĻāϰ clues āĻāĻŦāĻ mechanical complications assess āĻāϰāĻž āϝāĻžā§āĨ¤
đ Most probable diagnosis:
Cardiogenic shock, possibly secondary to acute MI/ACS with LV dysfunction.
â ī¸ āĻāĻāĻžāύ⧠āĻļā§āϧ⧠āĻĒā§āϰā§āύ⧠IHD history āĻĨāĻžāĻāϞā§āĻ âacute MIâ āϞāĻŋāĻāĻŦ āύāĻžâacute MI confirm āĻāϰāϤ⧠ECG + troponin + clinical picture āĻĻāϰāĻāĻžāϰāĨ¤
â
Initial Management
1ī¸âŖ ABC + Monitoring
* Airway & breathing assess āĻāϰā§āύ
* Oxygen/ventilatory support according to SpOâ and respiratory status
* Continuous BP, ECG, SpOâ monitoring
* 2 large-bore IV access
* Urgent ECG
* CBC, electrolytes, renal function, glucose
* Troponin
* ABG/VBG + lactate
* Portable CXR
* Urgent Echo/POCUS
2ī¸âŖ If hypotension persists â Norepinephrine
đ Norepinephrine is generally the preferred first-line vasopressor in cardiogenic shock with significant hypotension.
Start low and titrate according to BP/MAP and tissue perfusion.
3ī¸âŖ What about Dobutamine?
āϝāĻĻāĻŋ adequate BP support āĻĨāĻžāĻāĻž āϏāϤā§āϤā§āĻŦā§āĻ low cardiac output / poor perfusion āĻĨāĻžāĻā§, āϤāĻāύ Dobutamine may be considered as an inotrope.
āĻāĻā§ perfusion/BP support, āϤāĻžāϰāĻĒāϰ persistent low-output state āĻĨāĻžāĻāϞ⧠inotrope consider āĻāϰāϤ⧠āĻšāĻŦā§āĨ¤
â Dopamine
āĻŦāϰā§āϤāĻŽāĻžāύ practice-āĻ cardiogenic shock-āĻ norepinephrine is preferred over dopamine, particularly because dopamine is associated with more arrhythmias and less favorable outcomes in relevant shock populations.
4ī¸âŖ What about Lasix?
đ Pulmonary congestion/acute LV failure āĻĨāĻžāĻāϞ⧠loop diuretic may be required, but āĻāĻāĻŋ automatic step āύā§āĨ¤
āĻŦāĻŋāĻļā§āώ āĻāϰ⧠shock + very low BP āĻ
āĻŦāϏā§āĻĨāĻžā§ āĻāĻā§ perfusion/BP stabilize āĻāϰāĻž āĻā§āϰā§āϤā§āĻŦāĻĒā§āϰā§āĻŖāĨ¤
So:
Pulmonary edema/congestion + adequate perfusion â consider IV loop diuretic.
đĢ Fluid āϏāĻŽā§āĻĒāϰā§āĻā§ āĻā§āϰā§āϤā§āĻŦāĻĒā§āϰā§āĻŖ āĻāĻĨāĻž-
âCardiogenic shock-āĻ āĻā§āύ⧠fluid āĻĻā§āĻā§āĻž āϝāĻžāĻŦā§ āύāĻžâ â āĻāĻ statement āĻ āĻŋāĻ āύā§āĨ¤
Routine large-volume fluid bolus generally appropriate āύā§, especially āϝāĻāύ pulmonary edema/crepitations āĻāĻā§āĨ¤
āϤāĻŦā§ selected patientsâāϝā§āĻŽāύ hypovolemia āĻŦāĻž RV infarction-āĻāϰ suspicionâāĻ cautious fluid challenge āĻĒā§āϰā§ā§āĻāύ āĻšāϤ⧠āĻĒāĻžāϰā§, with frequent reassessment.
āϤāĻžāĻ-
No routine large-volume fluid infusion in cardiogenic shock, especially when pulmonary congestion is present. Fluid should be individualized according to the clinical/hemodynamic picture.
đ¨ āϏāĻŦāĻā§ā§ā§ āĻā§āϰā§āϤā§āĻŦāĻĒā§āϰā§āĻŖ āĻŦāĻŋāώā§
āϝāĻĻāĻŋ ACS/acute MI-āĻāϰ āĻāĻžāϰāĻŖā§ cardiogenic shock āĻšā§, āĻļā§āϧ⧠injection āĻĻāĻŋā§ā§ manage āĻāϰ⧠āϰāĻžāĻāĻž āϝāĻžāĻŦā§ āύāĻžāĨ¤
Urgent cardiology/CCU referral + definitive management/revascularization āĻĻāϰāĻāĻžāϰāĨ¤ 2025 ACC/AHA ACS guidance cardiogenic shock complicating ACS-āĻ prompt revascularization-āĻāϰ āĻā§āϰā§āϤā§āĻŦ strongly emphasizes āĻāϰā§āĨ¤
Refractory shock āĻšāϞ⧠early transfer to an appropriate shock/tertiary centre āĻ
āϤā§āϝāύā§āϤ āĻā§āϰā§āϤā§āĻŦāĻĒā§āϰā§āĻŖāĨ¤
āĻāĻāĻāύ Doctor āĻšāĻŋāϏā§āĻŦā§ emergency-āϤ⧠āĻāĻŽāύ āĻāĻāĻāύ patient āĻāϞ⧠āĻĒā§āϰāĻĨāĻŽ āĻāĻžāĻ āĻšāϞā§âshock recognize āĻāϰāĻž, differential causes āĻĻā§āϰā§āϤ assess āĻāϰāĻž, ABC stabilize āĻāϰāĻž āĻāĻŦāĻ definitive treatment-āĻāϰ āĻāύā§āϝ delay āύāĻž āĻāϰāĻžāĨ¤
Cardiogenic shock āĻāĻāĻāĻŋ time-critical emergency.
đĨ Initial stabilization â Urgent Echo/ECG â Vasopressor/inotrope when indicated â Cardiology/CCU â Definitive treatment/revascularization
đ ECGP Batch-12 Admission is Going On
đ Investigation + Indoor Emergency Management-āĻāϰ āĻāĻĒāϰ āĻāĻŽāĻžāϰ āĻāϞāĻžāĻĻāĻž practical classes āĻāĻā§āĨ¤
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Dr. Md Sajed Hossain
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