Systolic & Diastolic Function of the LV Flashcards
____ ____ is the percentage of the left ventricular diastolic volume that is ejected with systole.
Ejection fraction
Preload affects the ventricles during ____.
Diastole
Increased preload = ____ diastolic filling pressure.
Increased
Increased preload ____ stroke volume.
Increases
An increase in ____ causes ventricle to produce a greater force which leads to a reduced rate of fiber shortening and cardiac performance.
Afterload
What do we use to assess the systolic function of the LV?
Teichholtz, Simpson’s, dp/dt (doppler MR if it’s present)
dP/dt is used to assess ventricular ____ function.
Systolic
____ measures of the rate of rise of ventricular pressure during IVCT.
dP/dt
What is the formula for dP/dt?
32,000/∆t
To perform dP/dt, place a caliper at the edge of the MR jet at ____ m/s and ____ m/s. This will tell you the ∆t
1 m/s and 3 m/s
What is a normal dP/dt value?
> 1000
What dP/dt value shows mild-moderate dysfunction?
800-1000
What dP/dt value shows severe dysfunction?
< 800
Diastole comprises approximately ____ of the cardiac cycle.
2/3
M-mode is primarily used in ____ evaluation.
Systolic
