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The relationship between mitral annular systolic velocity and ejection fraction in patients with preserved global systolic function of the left ventricle.

Daskalov IR, Daskalova IK, Demirevska LD, Atzev BG - BMC Cardiovasc Disord (2013)

Bottom Line: The expected benefit was that Sm could be used to predict EF, when EF is difficult to assess due to poor image quality (IQ).There were no significant differences between the correlation coefficients between the subgroups and the controls.This approach may be useful especially when the IQ is poor.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Cardiology and Intensive Care, Cardiology Clinic, Military Medical Academy, 3 Georgi Sofiiski Blvd, Sofia 1606, Bulgaria. ivodaskalov@mail.bg.

ABSTRACT

Background: The aim of the study was to investigate the relationship between the ejection fraction (EF) and the mitral annular systolic velocity (Sm) in patients with preserved left ventricular systolic function (EF>55%). The study task was to evaluate whether the assessment of Sm(avg) can be used as an alternative to the Simpson's method in assessment of the EF. The expected benefit was that Sm could be used to predict EF, when EF is difficult to assess due to poor image quality (IQ).

Method: Sm was obtained by spectral pulse wave Tissue Doppler Imaging (pwTDI) from the lateral and septal sites of the mitral annulus (MA) and an averaged value was calculated - Sm(avg). EF was assessed using Simpson's rule. Participants were divided into controls (n=70), hypertensive (HTN, n=56), HTN with diastolic dysfunction (HTN/DD, n=65), HTN with diabetes mellitus (HTN/DM, n=52) and HTN with DD and DM (HTN/DD/DM, n=65).

Results: Sm(avg) showed strong correlation with EF (r=0.978; p<0.0001). There were no significant differences between the correlation coefficients between the subgroups and the controls. The mathematical model that the study recommended to assess the EF is: EF=45.0 + 2 × Sm(avg).

Conclusion: The assessment of Sm(avg) could be used as an alternative to EF. This approach may be useful especially when the IQ is poor. The method maintains high accuracy and reproducibility in prediction of the EF.

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Related in: MedlinePlus

The picture presents how to obtain Sm from the septal site of the MA using spectral pwTDI.
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Figure 2: The picture presents how to obtain Sm from the septal site of the MA using spectral pwTDI.

Mentions: Myocardial velocities were measured on-line using spectral pwTDI [15,16]. The sample volume was guided by color-coded images, which were acquired using low velocity, high-intensity myocardial signals at a high frame rate (>150 MHz). The imaging angle was adjusted to ensure as near to a parallel alignment of the beam as possible with the myocardial segment of interest. Longitudinal contraction of the LV was investigated by average peak systolic velocity of the mitral annulus – Sm(avg) using two positions, septal and lateral, from the apical 4-chamber view (Figure 1, Figure 2).


The relationship between mitral annular systolic velocity and ejection fraction in patients with preserved global systolic function of the left ventricle.

Daskalov IR, Daskalova IK, Demirevska LD, Atzev BG - BMC Cardiovasc Disord (2013)

The picture presents how to obtain Sm from the septal site of the MA using spectral pwTDI.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4231345&req=5

Figure 2: The picture presents how to obtain Sm from the septal site of the MA using spectral pwTDI.
Mentions: Myocardial velocities were measured on-line using spectral pwTDI [15,16]. The sample volume was guided by color-coded images, which were acquired using low velocity, high-intensity myocardial signals at a high frame rate (>150 MHz). The imaging angle was adjusted to ensure as near to a parallel alignment of the beam as possible with the myocardial segment of interest. Longitudinal contraction of the LV was investigated by average peak systolic velocity of the mitral annulus – Sm(avg) using two positions, septal and lateral, from the apical 4-chamber view (Figure 1, Figure 2).

Bottom Line: The expected benefit was that Sm could be used to predict EF, when EF is difficult to assess due to poor image quality (IQ).There were no significant differences between the correlation coefficients between the subgroups and the controls.This approach may be useful especially when the IQ is poor.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Cardiology and Intensive Care, Cardiology Clinic, Military Medical Academy, 3 Georgi Sofiiski Blvd, Sofia 1606, Bulgaria. ivodaskalov@mail.bg.

ABSTRACT

Background: The aim of the study was to investigate the relationship between the ejection fraction (EF) and the mitral annular systolic velocity (Sm) in patients with preserved left ventricular systolic function (EF>55%). The study task was to evaluate whether the assessment of Sm(avg) can be used as an alternative to the Simpson's method in assessment of the EF. The expected benefit was that Sm could be used to predict EF, when EF is difficult to assess due to poor image quality (IQ).

Method: Sm was obtained by spectral pulse wave Tissue Doppler Imaging (pwTDI) from the lateral and septal sites of the mitral annulus (MA) and an averaged value was calculated - Sm(avg). EF was assessed using Simpson's rule. Participants were divided into controls (n=70), hypertensive (HTN, n=56), HTN with diastolic dysfunction (HTN/DD, n=65), HTN with diabetes mellitus (HTN/DM, n=52) and HTN with DD and DM (HTN/DD/DM, n=65).

Results: Sm(avg) showed strong correlation with EF (r=0.978; p<0.0001). There were no significant differences between the correlation coefficients between the subgroups and the controls. The mathematical model that the study recommended to assess the EF is: EF=45.0 + 2 × Sm(avg).

Conclusion: The assessment of Sm(avg) could be used as an alternative to EF. This approach may be useful especially when the IQ is poor. The method maintains high accuracy and reproducibility in prediction of the EF.

Show MeSH
Related in: MedlinePlus