. 2021 Mar 21;20(3):713–718. doi: 10.5114/aoms/118938

Table III.

Echocardiographic parameters based on aortic valve area

Parameter	Moderately severe AS (AVA 0.8–0.99 cm²) (n = 75) (1)	Severe AS (AVA 0.60–0.79 cm²) (n = 90) (2)	Critical AS (AVA ≤ 0.59 cm²) (n = 35) (3)	P-values comparing columns
Parameter	Moderately severe AS (AVA 0.8–0.99 cm²) (n = 75) (1)	Severe AS (AVA 0.60–0.79 cm²) (n = 90) (2)	Critical AS (AVA ≤ 0.59 cm²) (n = 35) (3)	1 vs. 2	1 vs. 3
Ejection fraction (%)	57 ±13	58 ±15	52 ±15	0.64	0.11
Aortic valve area [cm²]	0.86 ±0.04	0.69 ±0.05	0.46 ±0.08	< 0.001	< 0.001
Peak gradient [mm Hg]	42 ±18	61 ±22	71 ±30	< 0.001	< 0.001
Mean gradient [mm Hg]	24 ±11	37 ±15	43 ±19	< 0.001	< 0.001
EDV [ml]	85 ±33	95 ±43	86 ±30	0.12	0.95
SV biplane [ml]	48 ±13	52 ±16	42 ±12	0.08	0.03
SV LVOT [ml]	51 ±15	54 ±14	41 ±9	0.22	< 0.001
SV index (LVOT)	30 ±9	31 ±8	25 ±6	0.67	0.002
Ejection time [ms]	304 ±40	319 ±30	322 ±30	0.02	0.05
MSF [ml/s]	169 ±41	171 ±44	129 ±29	0.79	< 0.001
LVOT diameter [cm]	1.8 ±0.21	1.8 ±0.23	1.74 ±0.18	0.27	0.10
Heart rate [beats/min]	73 ±12	74 ±14	75 ±13	0.43	.040

n – number of subjects, AVA – aortic valve area, EDV – end diastolic volume, SV biplane – stroke volume biplane Simpson’s method, LVOT – left ventricular outflow tract, MSF – mean systolic flow.