Table 3 Comparison of left atrial volumetric indexes, strain (ε) and strain rate (SR) parameters among patients with heart failure with preserved ejection fraction (HFpEF), patients with hypertrophic cardiomyopathy (HCM) and healthy controls

Left atrial function

Left atrial volumetric index (%)

Reservoir

LAEF Total

53.3 (6.7)

59.4 (5.8)

61.4 (6.0)

0.028

0.290

0.070

0.013

Conduit

LAEF Passive

24.4 (4.3)

25.6 (6.2)

35.2 (8.8)

0.010

0.019

0.705

0.005

Booster pump

LAEF Booster

29.0 (7.3)

33.8 (5.7)

26.2 (6.8)

0.041

0.013

0.122

0.406

Left atrial strain (%)

Reservoir

ε_s

16.3 (5.8)

22.1 (5.5)

29.1 (5.3)

0.001

0.008

0.034

0.001

Conduit

ε_e

11.9 (4.0)

10.4 (3.9)

21.3 (5.1)

<0.001

<0.001

0.650

0.001

Booster pump

ε_a

4.5 (2.9)

11.7 (4.0)

7.8 (2.5)

0.001

0.023

0.001

0.019

Left atrial strain rate (s ^-1 )

Reservoir

SRs

0.8 (0.3)

0.9 (0.2)

1.1 (0.2)

0.023

0.028

0.384

0.017

Conduit

SRe

-0.6 (0.1)

-0.5 (0.2)

-1.0 (0.3)

0.002

0.002

0.733

0.003

Booster pump

SRa

-0.5 (0.2)

-1.2 (0.4)

-0.9 (0.3)

0.004

0.131

0.004

0.010

Left atrial volume (ml/m ² )

LAV max

53.1 (11.2)

50.1 (13.6)

34.8 (9.1)

0.004

0.013

0.623

0.002

LAV min

24.8 (6.3)

20.6 (7.2)

13.4 (4.2)

0.002

0.021

0.186

0.001

LAV p-ac

40.1 (7.9)

37.7 (12.3)

23.0 (7.7)

0.002

0.011

0.597

0.001