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. 2014 Aug 4;9(8):e103717.
doi: 10.1371/journal.pone.0103717. eCollection 2014.

Right ventricular function quantification in Takotsubo cardiomyopathy using two-dimensional strain echocardiography

Affiliations

Right ventricular function quantification in Takotsubo cardiomyopathy using two-dimensional strain echocardiography

Felix Heggemann et al. PLoS One. .

Abstract

Aims: This study sought to characterize global and regional right ventricular (RV) myocardial function in patients with Takotsubo cardiomyopathy (TC) using 2D strain imaging.

Methods: We compared various parameters of RV and left ventricular (LV) systolic function between 2 groups of consecutive patients with TC at initial presentation and upon follow-up. Group 1 had RV involvement and group 2 did not have RV involvement.

Results: At initial presentation, RV peak systolic longitudinal strain (RVPSS) and RV fractional area change (RVFAC) were significantly lower in group 1 (-13.2±8.6% vs. -21.8±5.4%, p = 0.001; 30.7±9.3% vs. 43.5±6.3%, p = 0.001) and improved significantly upon follow-up. Tricuspid annular plane systolic excursion (TAPSE) did not differ significantly at initial presentation between both groups (14.8±4.1 mm vs. 17.9±3.5 mm, p = 0.050). Differences in regional systolic RV strain were only observed in the mid and apical segments. LV ejection fraction (LVEF) and LV global strain were significantly lower in group 1 (36±8% vs. 46±10%, p = 0.006 and -5.5±4.8% vs. -10.2±6.2%, p = 0.040) at initial presentation. None of the parameters were significantly different between the 2 groups upon follow-up. A RVPSS cut-off value of >-19.1% had a sensitivity of 85% and a specificity of 71% to discriminate between the 2 groups.

Conclusion: In TC, RVFAC, RVPSS, LVEF and LV global strain differed significantly between patients with and without RV dysfunction, whereas TAPSE did not. 2 D strain imaging was feasible for the assessment of RV dysfunction in TC and could discriminate between patients with and without RV involvement in a clinically meaningful way.

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Conflict of interest statement

Competing Interests: The authors have declared that no competing interests exist.

Figures

Figure 1
Figure 1. Right ventricular (RV) free wall systolic strain curves in a patient with RV involvement at baseline (A) and upon follow-up (B).
Figure 2
Figure 2. Distribution of RVPSS, TAPSE, RVFAC and LVGLS among patients with (RV+) and without (RV-) right ventricular involvement displayed by dotplots.
RVPSS: right ventricular peak systolic strain, TAPSE: tricuspid annular plane systolic excursion, RVFAC: right ventricular fractional area change, LVGLS: left ventricular global strain.
Figure 3
Figure 3. Correlation of RVPSS, RVFAC, TAPSE and LVGLS with occurrence of RV dysfunction displayed by receiver operating characteristic (ROC) curves.
RVPSS: right ventricular peak systolic strain, TAPSE: tricuspid annular plane systolic excursion, RVFAC: right ventricular fractional area change, LVGLS: left ventricular global strain.

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