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Mitral annular plane systolic excursion and intra-myocardial haemorrhage in acute myocardial infarction

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Journal of Cardiovascular Magnetic Resonance201517 (Suppl 1) :P163

https://doi.org/10.1186/1532-429X-17-S1-P163

  • Published:

Keywords

  • Acute Myocardial Infarction
  • Late Gadolinium Enhancement
  • Mitral Annulus
  • Philips Healthcare
  • Microvascular Obstruction

Background

Mitral annular plane systolic excursion (MAPSE) is known to have prognostic importance in the risk stratification of patients with acute myocardial infarction (MI). In post-MI patients with MAPSE<8mm, the combined mortality and hospitalization incidence is 43.8%. Similarly, CMR studies have shown that intra-myocardial haemorrhage (IMH) in the infarct core is an independent marker of prognosis. We hypothesised that the MAPSE on 4-chamber cine-CMR is correlated to left ventricular ejection fraction (EF) and to the presence of IMH.

Methods

Fourty-four patients received CMR examination at 3T (Intera CV, Philips Healthcare, Best, The Netherlands) within 3 days following reperfused ST-elevation acute MI. Cine, T2-weighted, T2* imaging and LGE imaging (0.1 mmol/kg gadolinium DTPA) were performed. Infarct and microvascular obstruction (MO) extent were measured from late gadolinium enhancement (LGE) images. The presence and extent of IMH was investigated by combined analysis of T2w and T2* sequences. We computed MAPSE (medial, lateral and average) using the 4-chamber cine. A line was drawn across both the medial and lateral mitral annulus as a reference point in end-diastole (just after closure of mitral valve). A second reference line was drawn across the same plane on an image taken just after closure of the aortic valve. The longitudinal distance parallel to the left ventricular wall was measured for both medial and lateral walls (Figure 1).
Figure 1
Figure 1

Illustration to show how the MAPSE measurements were taken in the four-chamber cine using contour forwarding.

Results

Of the 44 patients, 37 (84%) were male. Mean age of our studied population was 58.27±11.41. CMR parameters were as follows: LVEF 48.2±11.4%; indexed left ventricular end-diastolic volume (LVEDVi) 82.4±15.7 ml/m2; infarct volume LGE of 15.5±12.2 ml; medial MAPSE of 9.8±2.9 mm; lateral MAPSE of 10.97±2.3mm and averaged MAPSE of 10.27±2.1mm. Lateral MAPSE was significantly reduced to previously studied age-adjusted normal values (12.8±2.2mm; p=0.0087)(1).Controlling for age/gender/hypertension /hypercholesterolemia/smoker/diabetes, IMH was strongly negatively correlated to average MAPSE (r=-0.65; p<0.001). Averaged MAPSE was also moderately correlated to LVEF (r=0.47; p=0.001) (Figure 2). A cut-off value of 11mm for averaged MAPSE is 96% sensitive and 68.4% specific in ruling out IMH.
Figure 2
Figure 2

Box-plot of averaged-MAPSE to IMH and EF.

Conclusions

Averaged MAPSE, which is a simple CMR derived parameter of longitudinal function, has the potential to predict the presence of IMH in the setting of re-perfused acute myocardial infarction. This parameter could be easily measured at bedside by transthoracic echocardiography to predict presence of IMH.

Funding

JPG and SP receive a research grant from Philips Healthcare. SP is funded by British Heart Foundation fellowship (FS/10/62/28409).

Authors’ Affiliations

(1)
Multidisciplinary Cardiovascular Research Centre & The Division of Cardiovascular and Diabetes Research, Leeds Institute of Genetics, Health & Therapeutics, University of Leeds, Leeds, UK

References

  1. Bulluck H, Ngamkasem H, Sado D: A simple technique to measure TAPSE and MAPSE on CMR and normal values. J Cardiovasc Magn Reson. 2014, 16 (Suppl 1): P22-10.1186/1532-429X-16-S1-P22.PubMed CentralView ArticleGoogle Scholar

Copyright

© Garg et al; licensee BioMed Central Ltd. 2015

This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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