Abstract
To evaluate 2-dimensional speckle tracking echocardiography as a diagnostic and prognostic tool in patients with acute myocarditis. In this retrospective cohort study, 45 patients (age, 39 ± 15 years; 32 male) with suspected acute myocarditis and 83 healthy controls (age, 39 ± 13 years; 27 male) underwent 2-dimensional speckle tracking echocardiography. Main outcome measures were circumferential and longitudinal strain and strain rate as prognostic and diagnostic markers. Patients with myocarditis had lower circumferential strain (−13.3 ± 5.6 % vs. −22.3 ± 4 %), circumferential strain rate (−0.9 ± 0.3 vs. −1.4 ± 0.3 s−1), longitudinal strain (−11.7 ± 4 % vs. −17.7 ± 1.9 %), and longitudinal strain rate (−0.7 ± 0.2 vs. −1.0 ± 0.1 s−1) (all P < .001). For diagnostic purposes, longitudinal strain had the greatest area under the curve, 0.93 (optimal cutoff value, −15.1 %; sensitivity, 78 %; specificity, 93 %). Future events were defined as cardiac death, heart transplant, placement of left ventricular assist device or implantable cardioverter-defibrillator, pulmonary edema–related respiratory failure, cardiogenic shock, and rehospitalization due to cardiac events. For every 1 % decline in longitudinal or circumferential strain, the hazard ratios (95 % CIs) were 1.26 (1.10–1.47) and 1.34 (1.14–1.63), respectively; for every 0.1 s−1 decline in longitudinal or circumferential strain rate, the hazard ratios (95 % CIs) were 1.43 (1.09–1.89) and 1.52 (1.19–2.01), respectively (P < .01). Kaplan–Meier curve and log-rank test showed event-free survival significantly related to these 4 measurements. In acute myocarditis, left ventricular strain and strain rate may be promising diagnostic and prognostic tools, even in patients with preserved left ventricular ejection fraction. Most importantly, this imaging technique had a role in predicting deterioration and overall event-free survival.
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Abbreviations
- CMR:
-
Cardiovascular magnetic resonance
- FOV:
-
Field of view
- HR:
-
Hazard ratio
- LGE:
-
Late gadolinium enhancement
- OR:
-
Odds ratio
- SSFP:
-
Steady-state free precession
- TE:
-
Echo time
- TI:
-
Inversion time
- TR:
-
Repetition time
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Hsiao, JF., Koshino, Y., Bonnichsen, C.R. et al. Speckle tracking echocardiography in acute myocarditis. Int J Cardiovasc Imaging 29, 275–284 (2013). https://doi.org/10.1007/s10554-012-0085-6
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DOI: https://doi.org/10.1007/s10554-012-0085-6