Dataset Information

Left ventricular strain and strain rate by 2D speckle tracking in chronic thromboembolic pulmonary hypertension before and after pulmonary thromboendarterectomy.

ABSTRACT:

Background

Echocardiographic evaluation of left ventricular (LV) strain and strain rate (SR) by 2D speckle tracking may be useful tools to assess chronic thromboembolic pulmonary hypertension (CTEPH) severity as well as response to successful pulmonary thromboendarterectomy (PTE).

Methods

We evaluated 30 patients with CTEPH before and after PTE using 2D speckle tracking measurements of LV radial and circumferential strain and SR in the short axis, and correlated the data with right heart catheterization (RHC).

Results

PTE resulted in a decrease in mean PA pressure (44 ± 15 to 29 ± 9 mmHg), decrease in PVR (950 ± 550 to 31 ± 160 [dyne-sec]/cm?), and an increase in cardiac output (3.9 ± 1.0 to 5.0 ± 1.0 L/min, p < 0.001 for all). Circumferential and posterior wall radial strain changed by -11% and +15% respectively (p < 0.001 for both). Circumferential SR and posterior wall radial SR changed by -7% and 6% after PTE. While the increase in posterior wall SR with PTE reached statistical significance (p = 0.04) circumferential SR did not (p = 0.07). In addition, septal radial strain and SR did not change significantly after PTE (p = 0.1 and 0.8 respectively). Linear regression analyses of circumferential and posterior wall radial strain and SR revealed little correlation between strain/SR measurements and PVR, mean PA pressure, or cardiac output. However, change in circumferential strain and change in posterior wall radial strain correlated moderately well with changes in PVR, mean PA pressure and cardiac output (r = 0.69, 0.76, and 0.51 for circumferential strain [p < 0.001 for all] and r = 0.7, 0.7, 0.45 for posterior wall radial strain [p = 0.001, 0.001, and 0.02, respectively]).

Conclusions

LV circumferential and posterior wall radial strain change after relief of pulmonary arterial obstruction in patients with CTEPH, and these improvements occur rapidly. These changes in LV strain may reflect effects from improved LV diastolic filling, and may be useful non-invasive markers of successful PTE.

SUBMITTER: Olson N

PROVIDER: S-EPMC2955577 | biostudies-literature | 2010 Sep

REPOSITORIES: biostudies-literature

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Publications

Left ventricular strain and strain rate by 2D speckle tracking in chronic thromboembolic pulmonary hypertension before and after pulmonary thromboendarterectomy.

Olson Nicholas N Brown Jason P JP Kahn Andrew M AM Auger William R WR Madani Michael M MM Waltman Thomas J TJ Blanchard Daniel G DG

Cardiovascular ultrasound 20100927

<h4>Background</h4>Echocardiographic evaluation of left ventricular (LV) strain and strain rate (SR) by 2D speckle tracking may be useful tools to assess chronic thromboembolic pulmonary hypertension (CTEPH) severity as well as response to successful pulmonary thromboendarterectomy (PTE).<h4>Methods</h4>We evaluated 30 patients with CTEPH before and after PTE using 2D speckle tracking measurements of LV radial and circumferential strain and SR in the short axis, and correlated the data with righ ...[more]

PMID: 20875129

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Dataset Information

Left ventricular strain and strain rate by 2D speckle tracking in chronic thromboembolic pulmonary hypertension before and after pulmonary thromboendarterectomy.

Background

Methods

Results

Conclusions

Publications

Left ventricular strain and strain rate by 2D speckle tracking in chronic thromboembolic pulmonary hypertension before and after pulmonary thromboendarterectomy.

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