Table 1 Significant Raman bands among calculated band component analysis and their tentative assignments.

From: Atrial fibrillation designation with micro-Raman spectroscopy and scanning acoustic microscope

Raman shift (cm-1)

Normalized Raman intensity (a.u.) *103

Tentative assignments

Group1

Group2

Group3

817

9.2 ± 3.2

2.6 ± 5.3

7.2 ± 3.3

\(\nu\)(C-C) Protein backbone29

853

9.6 ± 4.7

3.6 ± 6.3

6.7 ± 4.8

Proline of collagen30

938

14.6 ± 5.2

1.7 ± 4.0

8.5 ± 3.4

C-H out-of-plane vibration (Collagen type I or tyrosine), \(\nu\)(C-C)31,32

1060

25.9 ± 6.7

70.9.1 ± 15.1

39.8 ± 8.3

\(\nu\)(C-C) Fatty acids33

1120

6.9 ± 0.4

39.4 ± 1.4

17.9 ± 1.4

\(\nu\)(C-C) Fatty acids33

1438

10.2 ± 8.0

59.1 ± 31.4

23.3 ± 13.4

HCC(out of plane), Proline31

1623

17.4 ± 1.4

18.7 ± 1.0

15.1 ± 1.4

Amide I \(\beta\) sheet34

1676

6.8 ± 2.7

9.5 ± 3.1

8.7 ± 3.1

Amide I \(\beta\) sheet35