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Table 2 Preoperative baseline measurements and postoperative changes in the separate procedural groups

From: Cardiovascular magnetic resonance evaluation of symptomatic severe aortic stenosis: association of circumferential myocardial strain and mortality

 

SAVR

TAVI

p Value†

 

Baseline

6 months

Baseline

6 months

 

Haemodynamics

 Heart Rate (bpm)

63 ± 9

64 ± 12

67 ± 12

68 ± 15

0.952

 Systolic BP (mmHg)

136 ± 21

133 ± 20

133 ± 25

137 ± 23

0.200

 Diastolic BP (mmHg)

75 ± 10

72 ± 11

66 ± 10

65 ± 9

0.265

Valvular Function

 Aortic Peak PG (mmHg)††

52 ± 18

30 ± 13***

52 ± 16

22 ± 13***

0.072

 Aortic Regurgitant Fraction (%)

19 ± 16

10 ± 11*

16 ± 11

9 ± 7**

0.936

 MR fraction (%)

20 ± 18

8 ± 10**

26 ± 16

16 ± 16**

0.514

Left Ventricle

 EDVI (ml/m2)

94 ± 25

76 ± 13***

94 ± 21

88 ± 20**

0.023

 LVEF (%)

58 ± 12

61 ± 11*

52 ± 11

54 ± 11

0.403

 Mass Index (g/m2)

76 ± 22

61 ± 16***

79 ± 21

66 ± 18***

0.691

 LVM/LVEDV (g/ml)

0.82 ± 0.2

0.81 ± 0.2

0.86 ± 0.2

0.77 ± 0.2***

0.041

Peak Circumferential strain

 Base (%)

−19.8 ± 5.2

−18.6 ± 4.9

−17.6 ± 5.8

−18.5 ± 5.8

0.03

 Mid (%)

−21.1 ± 5.3

−20.0 ± 4.3

−19.3 ± 6.1

−19.8 ± 6.5

0.158

 Apex (%)

−20.0 ± 6.4

−17.5 ± 6.8**

−18.8 ± 6.7

−18.8 ± 6.0

0.054

Peak mid-ventricular strain rate

 Systolic (S−1)

−0.032 ± 0.010

−0.034 ± 0.009

−0.029 ± 0.008

−0.032 ± 0.007**

0.188

 Diastolic (S−1)

0.028 ± 0.016

0.028 ± 0.018

0.022 ± 0.015

0.023 ± 0.014

0.653

 LV torsion

14.08 ± 8.40

7.81 ± 4.51***

14.43 ± 4.66

11.20 ± 4.62***

0.094

 LV twist (°)

16.17 ± 7.01

12.45 ± 4.78**

16.08 ± 5.36

12.36 ± 5.21***

0.999

  1. †Independent samples t-test to compare degree of change seen following SAVR with that seen following TAVI. Paired t test of baseline Vs 6 months: *p < 0.05, **p < 0.01, ***p < 0.001