Diastolic function Flashcards
define diastole
- phase of the heart cycle where chambers relax and fill with blood under low pressure. From AV closure to MV closure
compliance
change in volume/change in pressure
what is compliance inverse to?
stiffness
stiffness
change in pressure/change in volume
IVRT
period between AV closure & MV open
- LV pressure falling
- 50-100ms
Early filling
150-200ms
- between MV open and diastasis
which phase of diastole may be absent with AFIB?
late filling - atrial contraction
what do the LV filling pressures include?
- LVEDP
- mean LAP
what does an increase i LAEDP and LAP do to the LA?
dilate
how thick is the LA
2-3mm
CAD causes of DD
ischemia, infarct
secondary hypertrophy (changes to heart muscle are adaptations to another disease) examples
HTN
aortic stenosis
severe MR
primary myocardial disease examples
dilated cmo
infiltrative myocardial disease
hypertrophic cmo
normal E/A
0.8-2
normal DT
150-200
mild DD
- reduced E/A
- reduced E
- prolonged DT
- reduced TDI
- E/e <14 (not increased)
- TR jet <2.8 still normal
- mild SOB on exertion
grade 2 or psuedo normal DD
- impaired relaxation
- MV pattern looks normal
- E/e prime 10-14 (abn)
- MV A wave duration shortens as LAP increases
- everything else looks normal
- SOB at lower levels of activity
- get them to do valsalva to reduce venous return
- E wave will reduce <50% if positive
which DD do you see an L wave with in the MV inflow trace?
grade 2 DD
increase LAP
grade 3 DD
- increased E vel
- INCREASED E/A >2
- short DT
- increased E/e prime >14
- Tall E wave, short DT, increased LAP
when is flow reversed in the pulmonary veins?
atrial systole
three things that happen with DD
- PV atrial reversal wave increases velocity
- PV atrial reversal wave increases duration
- MV a wave decreases duration
