Hemodynamics after Fontan operation in complex congenital heart defects with univentricular circulation by Elisaveta Levunlieva

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Abnormal myocardial performance index in M-mode color tissue Doppler-echocardiography by Andrey Ivanov, Nikolay Runev, Emil Manov, Elisaveta Levunlieva

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Effectiveness and safety of balloon pulmonary valvuloplasty in newborns and infants by Kiparisiya Nenova, Anna Kaneva-Nencheva, Elisaveta Levunlieva, Lyubomir Dimitrov, Margarita Tzonzarova

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Invasive hemodynamic assessment of the effect of sildenafil treatment after Fontan operation by Elisaveta Levunlieva, Anna Kaneva, Reneta Lekova, Kiparisiya Nenova-Karakasheva, Lyubomir Dimitrov

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