Comprehensive evaluation of right ventricular function in patients with acute pulmonary embolism

Objective. To study indices of right ventricular (RV) longitudinal deformation at transthoracic echocardiography (TTE) in patients with acute pulmonary embolism (APE), to determine their threshold values; to study indices of right ventricular-arterial coupling (RVAC) in patients with APE, to determine their threshold values.

Methods. We examined 34 patients with acute massive and submassive pulmonary embolism. The diagnosis was made on the basis of computed-tomography pulmonary angiogram. The mean age was 61 ±13 years. Of these, 16 were women (47,1%) and 18 were men (52,9%). As a control group, 30 healthy individuals were examined: 14 males and 16 females. The mean age of the healthy individuals was 39±9,8 years. Echocardiography was performed on Vivid E95 (GE HealthCare, USA) with data postprocessing on EchoPak workstation. The indices of right ventricular (RV) systolic and diastolic function, the magnitude of global longitudinal deformation of the right ventricle (GLS RV) and longitudinal deformation of the right ventricular free wall (RVFWLS) were studied using two-dimensional speckle-tracking echocardiography. We studied indices of right ventricular-arterial coupling (RVAC). We determined the relationship of longitudinal deformation of RV and RVAC with other indices of its systolic function. 

Results. Mean values of traditional parameters of RV contractile function were within normal limits, whereas mean values of longitudinal strain in APE were significantly lower than normal. There was also a significant decrease ( P < 0,0001) of all measured parameters of right ventricular-arterial coupling in patients with APE in comparison with the control group.

Conclusions. When longitudinal deformation parameters are included in the criteria of RV dysfunction in APE, its detectability increases from 26,47% to 61,77%. The revealed decrease of right ventricular-arterial coupling parameters in APE indicates a more frequent disturbance of the connection between RV and the small circle of blood circulation

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