Abstract:

Aim: was to assess dynamics of strain (S) and strain rate (SR) of longitudinal, circular and radial fibers in patients with left ventricular (LV) aneurysm (LVA) before and in early stages after coronary artery bypass graft (CABG) using Velocity Vector Imaging.

Material and methods: in 270 segments LV in patients with LVA, S and SR of LV fibers was analyzed before and after CAB. Also analysis of S and SR was performed in patients with CABG and plastic of the LV (group 1, 144 segments) and in the group with CABG without plastic of the LV (group 2, 126 segments).

Results: a function of longitudinal, circular and radial fibers after CABG has improved in all patients. Only SR of radial fibers reached normal. In group 1 was received the positive dynamics from the longitudinal S and SR, and SR circular and radial fibers. In group 2 indicators of function of longitudinal and circular fibers remained without negative dynamics, but positive dynamics is observed only from the SR of the radial fibers. The SR of radial fibers in both groups was normalized.

Conclusion: improvement of LV function in all patients is due to the group I. It is important to study the LV function in patients with LVA depending on the type of surgery.

References

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9.     Helsinki declaration of VMA: Eticheskie principy medicinskih issledovanij s privlecheniem cheloveka, prinyataya 18-j General'noj Assambleej VMA (Hel'sinki, Finlyandiya, iyun’ 1964 п.) [Ethical principles of medical researches with involvement of the person, Accepted by the 18th General Assembly of VMA (Helsinki, Finland, June, 1964). ]http://www. psychiatr.ru/lib/helsinki_declaration.php. (date of the address: 25.05.2015 г.) [In Russ]

Abstract:

Aim: was to determine what dimensions of an end-diastolic volume (EDV) in patients with reducec left ventricular function (LV) higher chances to measure its value up to 50 ml with Echocardiography compared to MRI.

Materials and methods: the sample consisted of 134 patients with ischemic cardiomyopathy and ejection fraction (EF) less than 35%. A mathematical model that calculates what dimensions of the MLC are more likely to determine its size with an accuracy of up to 50 ml with Echocardiography compared to MRI. Produced logistic regression analysis and calculated odds ratios.

Results: аccording to Echocardiography the EDV was 250.5 ± 67.6 ml, EF was 29.4 ± 5.0 percent. According to MRI, the EDV was 249.3 ± 77.2 ml, EF was 29.9 ± 6.4 percent. Results of the logistic regression analysis showed that EDV to 150 ml have high chances of a consistent measure of EDV with Echocardiography and MRI (OR a 2,5). In groups with EDV more than 150 ml but less than 300 ml had low chances of an accurate measurement of the EDV at the Echocardiography (OR from 0,62 to 0,95). Since EDV is greater than 300 ml, a marked increase chances Echocardiography, to determine EDV up to 50 ml compared to MRI (OR from 2,3 to 4,2).

Conclusions: when EDV to 150 ml, and in dilatation of the left ventricle more than 300 ml MRI has no advantages compared to Echocardiography In these figures there is no need to duplicate echocardiographic study When the EDV of 150 to 300 ml, for determination of volumetric indices it is better to use MRI, because the computations do not depend on the geometric shape of the left ventricle.

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