Error 8/10: Equating low ejection fraction in sick patients with cardiogenic shock.
This is a common mistake.
For example, a patient has shock and POCUS shows depressed LV function. This must be cardiogenic shock then! Not so fast...
Remember, patients with cardiomyopathy (acute or chronic) can have low, normal, or high stroke volume. They can also have low, normal, or high filling pressures.
In these patients, using a VTI (or some other estimate of stroke volume) and then an estimate of filling pressures (B-lines, E/e', or VEXUS for right side) is super valuable.