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Table 2 LA phasic mechanical functional indexes in the four study groups

From: Clinical implication of disturbed left atrial phasic functions in the heterogeneous population associated with hypertension or atrial fibrillation

Variable

Controls (n = 28)

Isolated HTN group

(n = 25)

Lone AF group

(n = 24)

HTN with PAF group

(n = 28)

P

LA strain indexes (%)

 PALSpump

−17.13 ± 2.94

−16.65 ± 2.90

−13.73 ± 5.06*#

−11.62 ± 4.19*#

0.000

 PALSres

36.10 ± 4.90

29.95 ± 5.56*

29.45 ± 7.53*

26.49 ± 6.64*

0.000

 PALScond

−18.96 ± 4.56

−13.30 ± 4.81*

− 15.73 ± 5.26*

−14.87 ± 5.30*

0.001

LA strain rate indexes (s−1)

 PALSRpump

−2.49 ± 0.45

−2.30 ± 0.57

−1.88 ± 0.78*

−1.54 ± 0.62*#&

0.000

 PALSRres

1.71 ± 0.30

1.57 ± 0.71

1.43 ± 0.34*

1.23 ± 0.31*#

0.001

 PALSRcond

−1.80 ± 0.95

−1.07 ± 0.41*

− 1.18 ± 0.35*

−1.10 ± 0.33*

0.000

LA strain ratio and strain rate ratio indexes

 PALSpump/PALSres

0.48 ± 0.08

0.57 ± 0.11*

0.46 ± 0.13#

0.44 ± 0.13#

0.001

 PALScond/PALSres

0.52 ± 0.08

0.43 ± 0.11*

0.54 ± 0.13#

0.56 ± 0.13#

0.001

 PALSpump/PALScond

0.96 ± 0.31

1.48 ± 0.77*

0.97 ± 0.47#

0.90 ± 0.53#

0.001

 PALSRpump/PALSRcond

1.55 ± 0.50

2.39 ± 0.93*

1.79 ± 0.81#

1.52 ± 0.90#

0.000

LA synchrony indexes (%)

 TpSpump-SD%

2.80 ± 0.89

3.48 ± 1.21

3.75 ± 1.33*

4.19 ± 1.47*

0.001

 TpSres-SD%

5.84 ± 0.95

6.68 ± 1.76

7.22 ± 2.39*

6.70 ± 2.03

0.071

 TpSRpump-SD%

2.69 ± 0.72

2.72 ± 0.72

2.96 ± 1.19

3.06 ± 1.12

0.386

 TpSRres-SD%

5.67 ± 2.12

5.61 ± 1.54

5.67 ± 1.82

6.29 ± 1.93

0.463

 TpSRcond-SD%

4.13 ± 1.40

4.67 ± 1.24

4.47 ± 1.09

4.49 ± 1.33

0.480

  1. AF Atrial fibrillation, cond Atrial conduit phase, HTN Hypertension, LA Left atrial, PAF Paroxysmal atrial fibrillation, PALS Peak atrial longitudinal strain, PALSR Peak atrial longitudinal strain rate, pump Atrial pump phase, res Atrial reservoir phase, TpS-SD% The standard deviation of time to peak atrial longitudinal strain corrected by RR interval, TpSR-SD% The standard deviation of time to peak atrial longitudinal strain rate corrected by RR interval
  2. *P < 0.05 vs. controls, #P < 0.05 vs. isolated HTN group, &P < 0.05 vs. lone AF group
  3. Data are expressed as mean ± SD