NEW CHARACTERISTICS OF LONG-TERM COVERABILITY DETERMINED BY THE SPECKLE TRACKING METHOD 

Oleynikov Valentin Elivich, Doctor of medical sciences, professor, head of the sub-department of therapeutics, Medical Institute, Penza State University (40 Krasnaya street, Penza, Russia), E-mail: v.oleynikof@gmail.com
Smirnov Yuriy Gennad'evich, Doctor of physical and mathematical sciences, professor, head of the subdepartment of mathematics and supercomputer modeling, Penza State University (40 Krasnaya street, Penza, Russia), E-mail: smirnovyug@mail.ru
Galimskaya Vera Aleksandrovna, Candidate of medical sciences, associate professor, sub-department of therapeutics, Medical Institute, Penza State University (40 Krasnaya street, Penza, Russia), E-mail: Vera-budanova@mail.ru
Kupriyanova Svetlana Nikolaevna, Candidate of physical and mathematical sciences, associate professor, sub-department of mathematics and supercomputer modeling, Medical Institute, Penza State University (40 Krasnaya street, Penza, Russia), E-mail: snkupr@yandex.ru
Salyamova Lyudmila Ivanovna, Candidate of medical sciences, associate professor, sub-department of therapeutics, Medical Institute, Penza State University (40 Krasnaya street, Penza, Russia), E-mail: l.salyamova@yandex.ru
Golubeva Alena Vladimirovna, Assistant, sub-department of therapeutics, Medical Institute, Penza State University (40 Krasnaya street, Penza, Russia), E-mail: Fialmy@mail.ru 

616.12-008.331.1 

10.21685/2072-3032-2019-1-3 

Background. Development and justification of new indicators on the basis of longitudinal deformation, characterizing the contractile function of individual segments of the left ventricle during the cardiac cycle in patients with myocardial infarction with segment elevation (STEMI).
Materials and methods. The new parameters were studied in a group of 86 patients (52.6 ± 8.9 years) with MISTST and 104 healthy subjects. Echocardiography was performed on an MyLab Esaote ultrasound scanner (Italy). Using the software X-Strain (Esaote), the parameters of speed, strain and strain rate were calculated. Along with the global parameters of deformity, new indicators were studied that take into account both peak and postsystolic contractility of each segment of the left ventricle throughout the entire cardiac cycle.
Results. A post-systolic index of deformation time delay and an integral index of contractility are proposed. The integral contractility index significantly differed in all segments in two groups of patients.
Conclusions. The proposed concept using a set of indicators of the effectiveness of the contractile function of the myocardium opens up the prospect of studying the compensatory capabilities of the heart using the optimal therapeutic and diagnostic tactics. 

global longitudinal strain, segmental longitudinal strain, acute myocardial infarction, speckle tracking, echocardiography 

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