VADS/MCS

Question 1

Expected peak velocity for axial flow LVAD

Answer 1

<200 cm/sec

Question 2

Expected peak velocity for pulsatile LVAD

Answer 2

<230cm/sec

Question 3

Expected stroke volume for pulsatile LVAD

Answer 3

65cc

Note: cannula diameter is 16mm

Question 4

What is the optimal position for an IABP?

Answer 4

1-2cm below L SCA

Question 5

What is the optimal position for an Impella?

Answer 5

3.5cm into the LV beyond the AV (3.5-4cm)

Question 6

Does an Impella load or unload the heart?

Answer 6

It causes unloading of the LV (decreases afterload)

Question 7

Does VA-ECMO load or unload the heart?

Answer 7

It causes loading of the LV (increases afterload)