ICUIdea

Disfunctia diastolica

 = relaxare anormala a LV si stiffness → ↑ presiunile de umplere a LV

Relaxarea LV

= Normala → fara WMA, LVEF N, E > A, volum LA N 

(poate fi ↑: atleti, FiA, ↑CO)

= Anormala → WMA, ↓ EF, LVH concentrica (ok atleti),

↓ e’, ↑ volum LA (sensibil, dar nu specific)

E/A ≤ 0.8 m/s, e’_lat < 8 cm/s, e’_sep < 7 cm/s, E ≥ 50cm/s

Faze diastola

1. IVRT

• sfarsitul sistolei, inchidere AV → deschidere MV
• pana cand P_LV < P_LA

2. Umplere rapida (unda E)

• incepe cu deschiderea MV, ↑ P_LV

3. Diastaza

• relaxarea LV, se termina in ⅓ diastola
• distanta E → A
• cand P_LV = P_LA ∄ flux in MV

4. Contractia atriala (unda A)

• sfarsitul diastolei
• absenta in FiA
• PLA P_LA > P_LV – MV se deschide larg
• 10-20% din umplere LV