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Classification of longitudinal strain curves measured by speckle-tracking echocardiography in normal and pathological myocardial segments

Oana Mirea
Oana Mirea
, 
Mihaela Berceanu
Mihaela Berceanu
, 
Sorina Soldea
Sorina Soldea
, 
Ionuț Donoiu
Ionuț Donoiu
 oraz 
Victor Raicea
Victor Raicea
   | 26 gru 2023
Romanian Journal of Cardiology's Cover Image
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Article Category: Original Article
Data publikacji: 26 gru 2023
Zakres stron: 141 - 146
DOI: https://doi.org/10.2478/rjc-2023-0031
Słowa kluczowe
© 2023 Oana Mirea et al., published by Sciendo
This work is licensed under the Creative Commons Attribution 4.0 International License.

Figure 1

Red quadrant: longitudinal strain curve showing all components: Peak P as initial lengthening; PSS: peak systolic strain as the maximum longitudinal deformation before aortic valve closure (AVC); PMS: peak maximum strain as the maximum longitudinal deformation during the cardiac cycle. A) Type 1 curve; B) Type 2 curve; C) Type 3 curve; D) Type 4 curve; E) Type 5 curve; F) Type 6 curve; G) Type 7 curve.
Red quadrant: longitudinal strain curve showing all components: Peak P as initial lengthening; PSS: peak systolic strain as the maximum longitudinal deformation before aortic valve closure (AVC); PMS: peak maximum strain as the maximum longitudinal deformation during the cardiac cycle. A) Type 1 curve; B) Type 2 curve; C) Type 3 curve; D) Type 4 curve; E) Type 5 curve; F) Type 6 curve; G) Type 7 curve.

Figure 2

Correlation plot between echocardiographic derived WMSI and LSCI.
Correlation plot between echocardiographic derived WMSI and LSCI.

Characteristics of longitudinal strain curves

Peak P (%) PMS (%) TPMS (ms) Characteristics
Type 1 (T1) <6 ≥6 Before AVC Normal segmental activation (Figure 1A)
Type 2 (T2) <6 ≥6 After AVC Post systolic deformation (Figure 1B)
Type 3 (T3) ≥6 ≥6 Before AVC ISL followed by normal segmental activation (Figure 1 C)
Type 4 (T4) ≥6 ≥6 After AVC ISL followed by post systolic deformation (Figure 1 D)
Type 5 (T5) <6 ≥6 First third of systole Early systolic shortening followed by no active event during systole (Figure 1E)
Type 6 (T6) <6 <6 - No active event during systole (figure 1F)
Type 7 (T7) ≥6 <6 - Holo-systolic lengthening (Figure 1G)

Anthropometric and conventional two dimensional and Doppler echocardiography measurements

Unit Control group (n=100) Ischemic group (n=50)
Age (years) 45±14 54±16*
SBP (mmHg) 118±14 118±18
DBP (mmHg) 71±9 72±9
HR (bpm) 66±13 67±14
IVSd (mm) 8.6±1.7 10.2±3.2*
PWd (mm) 8.7±1.4 9.2±2.2
LVIDd (mm) 47.4±4.8 57.0±8.5*
LVIDs (mm) 30.8 ±5.3 43.3 ±12.7*
LVMi (g/m2) 78.5±22.3 116.7±39.7*
LV EDVi (ml/ m2) 56±13 79±29*
LV ESVi (ml/ m2) 21±7 44±26*
LV EF (%) 64±6 48±14*
LAESVi (ml/ m2) 33±8 43±16*
E wave (m/s) 72±15 72±19
DTE (ms) 185±38 203±54
A wave (m/s) 46±13 60±28*
E/A 1.7±0.5 1.5±1.0
LV s’ (cm/s) 10±2 7±3*
LV e’ (cm/s) 13±3 8±4*
LV a’ (cm/s) 10±3 7±3*
E/e’ 6±1 11±6*
TAPSE (mm) 23±3 16±3*

Average PSS and PMS in the two study groups for each LSC type

LSC Control group (n=100) Ischemic group (n=50)
PSS PMS PSS PMS
Type 1 -22.4±4.0* -22.6±4.0* -19.0±5.8 -19.2±5.8
Type 2 -20.2±4.2* -21.8±4.4* -12.2±6.0 -14.9±5.8
Type 3 - - -12.3±2.4 -12.4±2.3
Type 4 -21.7±1.7* -23.8±1.3* -9.4±4.8 -13.9±5.3
Type 5 - - -8.1±2.1 -9.1±1.9
Type 6 - - -2.9±1.5 -3.8±1.5
Type 7 - - -2.3±1.1 -3.0±1.2
eISSN:
2734-6382
Język:
Angielski
Częstotliwość wydawania:
4 razy w roku
Dziedziny czasopisma:
Medicine, Clinical Medicine, Internal Medicine, Cardiology, Pediatrics and Juvenile Medicine, Paediatric Cardiology, Surgery, Cardiac Surgery
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