Tissue Doppler Flashcards
What angle do you want to keep tissue doppler within?
<20 degrees
Tissue doppler should be averaged over how many cardiac cycles?
3
What e’ on the lateral mitral annulus work indicate that they have Grade 0 (Normal)?
Lateral e’ velocity of > 10 cm/sec
If the e’ (lateral mitral TDI) is <10 cm, what determines Grade 1 impaired relaxation?
E/e’ <8
If the e’ (lateral mitral TDI) is <10 cm, what determines Grade 2 pseudonormal?
E/e’ = 9-12
If the e’ (lateral mitral TDI) is <10 cm, what determines Grade 3 Restrictive?
E/e’ > 13
In the ME 4 chamber, how does the septal annulus move during systole? during diastole
Moves down = Systole
Moves up = Diastole (What we measure)
During tissue doppler, what are the main 3 waves we look at?
Draw these waves
S’ = Peak velocity during systole
e’ = Peak early velocity diastole
a’ = Peak late velocity diastole
What is the myocardial performance index?
IVCT + IVRT / ET
Isovolumetric contraction time
Isovolumetric relaxation time
Ejection TIme
What is a concerning lateral mitral annulus e’ wave?
<8 cm/sec = Bad
Which mitral annulus has a greater velocity?
What is the caveat?
lateral > septal
Caveat = CP in which lateral e’ < septal e’
What is a non-reassuring e’ velocity?
e’ < 8 cm/sec = bad
What is a reassuring a’ velocity?
a’ <10 = Good
what is a non-reassuring e’/a’ ratio?
<1 = bad
What are the 3 important time intervals needed to know for TDI?
- Isovolumetric Contraction
- Ejection Time
- Isovolumetric Relaxation
What is a reassuring s’ velocity?
s’ > 8 cm/sec = good
What is a non-reassuring s’ velocity?
s’ < 5 cm/sec = bad
What is the Te’?
What is the significance for diastole?
Time to e’
Onset of QRS to onset of e’ wave
For diastole = Prolonged Te’ in diastolic dysfunction