Automated function imaging: a new operator-independent strain method for assessing left ventricular function

Belghiti, Hasnaa; Brette, Stephanie; Lafitte, Stéphane; Réant, Patricia; Picard, François; Serri, Karim; Lafitte, Marianne; Courregelongue, M; Santos, Pierre Dos; Douard, H.; Roudaut, R.; DeMaria, Anthony N.

doi:10.1016/s1875-2136(08)71798-4

Cited by 117 publications

(101 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Two-dimensional global longitudinal strain obtained with the AFI technology provides objective and quantitative assessments of LV function. AFI is novel, angle independent, more reproducible, apparently simpler, and computationally faster speckle tracking technique (20). In various studies, which were conducted on patients with systolic heart failure and AFI method was used, GL S value defined by AFI was correlated with the wall motion score determined by angiography and echocardiography.…”

Section: Discussionmentioning

confidence: 99%

“…In each of the apical views, LV walls were divided into six segments, for each LV segment the value of strain and quality of tracking were then assessed. The mean L S value was calculated for each of the three views (20). The value of the global longitudinal LV strain (GL S ) was calculated as the arithmetical mean of the values.…”

Section: Automated Functional Imaging Techniquesmentioning

confidence: 99%

See 1 more Smart Citation

Evaluation of subclinical left ventricular systolic dysfunction in patients with obstructive sleep apnea by automated function imaging method; an observational study

Altekin¹,

Yanıkoğlu²,

Karakaş³

et al. 2012

Anadolu Kardiyol Derg

View full text Add to dashboard Cite

Objective: We aimed to evaluate the subclinical left ventricular (LV) systolic dysfunction with the automated function imaging method (AFI) based on speckle tracking echocardiography (STE) in obstructive sleep apnea patients (OSA) with normal left ventricular ejection fraction (LVEF) and without any confounding disease that can cause myocardial dysfunction. Methods: Twenty-one healthy individuals and 58 OSA patients were included in this observational cross-sectional study. According to the severity of disease, OSA patients were examined in three groups; mild, moderate and severe OSA. Apical 2-, 3-and 4-chamber images were obtained for AFI evaluation. The global systolic longitudinal strain (GL S ) values were determined for each view, and averages of these were used in comparison of the patient groups. One-way ANOVA, Kruskal-Wallis, Pearson correlation tests and linear regression analysis were used for statistical analysis. Results: The GL S values of the OSA patients were lower than of the healthy individuals and these values were decreased along with the OSA severity (Healthy:-25.58±-2.16%, Mild:-23.93±-3.96%, Moderate:-21.27±-2.60%, Severe:-16.94±-2.66%, respectively). The difference was significant between moderate OSA patients and healthy individuals, and significant between severe OSA patients and all other groups (p<0.03). The apnea-hypopnea index was found to be correlated with the GL S (β=-0.659, 95% CI: 0.09-0.17, p<0.001). Conclusion: Longitudinal LV mechanics in OSA patients with normal LVEF are deteriorated in the subclinical stage being associated with the severity of disease. AFI can be used as an effective and safe method in the determination of subclinical myocardial dysfunction in OSA patients, because it is semi-automated and easy to use with a short analysis time.(Anadolu Kardiyol Derg 2012; 12: 320-30) Key words: Obstructive sleep apnea, speckle tracking echocardiography, myocardial strain, regression analysis 320 ÖZET Amaç: Sol ventrikül ejeksiyon fraksiyonu normal ve miyokart fonksiyonlarını etkileyecek ek hastalığı bulunmayan, obstrüktif uyku apneli (OUA) hastalarda, subklinik sol ventrikül sistolik disfonksiyonunu, iki boyutlu benek izleme ekokardiyografi tekniğine dayanan, otomatik fonksiyonel görün-tüleme yöntemi (OFG) ile değerlendirmeyi amaçladık. Yöntemler: Gözlemsel enine-kesitli çalışmamıza 21'i sağlıklı, 58'i OUA hastası olan toplam 79 kişi alındı. OUA'lı hastalar hastalığın ciddiyetine göre hafif, orta ve ağır olarak 3 gruba ayrıldı. OFG değerlendirmesi için sol ventrikülün apikal 2-, 3-, 4-boşluk görüntüleri kullanıldı. İlgili boşluk-lara ait sistolik longitüdinal deformasyon değerlerinin aritmetik ortalaması olan, global longitüdinal deformasyon değerleri gruplar arasında karşılaştırıldı. İstatistiksel analiz için tek -yönlü ANOVA, Kruskal-Wallis, Pearson korelasyon testleri ve doğrusal regresyon analizi kullanıldı. Bulgular: Sağlıklı gruba göre hafif OUA grubundan itibaren hastalığın ciddiyeti ile global longitüdinal deformasyon değerleri azalmaktaydı (Sağlıklı: -%25...

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Automated Functional Imaging Techniquesmentioning

confidence: 99%

Evaluation of subclinical left ventricular systolic dysfunction in patients with obstructive sleep apnea by automated function imaging method; an observational study

Altekin¹,

Yanıkoğlu²,

Karakaş³

et al. 2012

Anadolu Kardiyol Derg

View full text Add to dashboard Cite

show abstract

“…2D strain is an automated and quantitative technique for the measurement of global long-axis function from gray-scale images. Longitudinal tissue deformation is evaluated by frame-byframe tracking of individual speckles throughout the cardiac cycle, and GLS is calculated from the mean of 18 cardiac segments [14].…”

Section: Discussionmentioning

confidence: 99%

“…Left ventricular (LV) volumes and ejection fraction (EF) were obtained by the modified biplane Simpson's method. Speckle tracking analysis using the commercially available automated function image technique was applied for assessment of global longitudinal strain (GLS) from apical long-axis slices (long-axis and 2-and 4-chamber views) using a previously reported method [13,14].…”

Section: Riassuntomentioning

confidence: 99%

Left ventricular function in rheumatoid arthritis during anti-TNF-Î± treatment: a speckle tracking prospective echocardiographic study

Vizzardi

Cavazzana

Franceschini

et al. 2016

Monaldi Arch Chest Dis

View full text Add to dashboard Cite

Aim. Rheumatoid arthritis (RA) shows a high risk for cardiovascular disease, including heart failure. Although TNF-α has been implicated in the pathogenesis of myocardial remodelling, TNF-α inhibition did not show any efficacy in patients with advanced heart failure and should be contraindicated in RA with cardiac complications. We aimed to assess global left ventricular (LV) systolic function using global longitudinal strain (GLS) as a measure of myocardial deformation, in a group of RA patients before and during anti-TNF-α treatment. Methods. 13 patients (female:male 7:6) affected by RA were prospectively followed for one year during anti TNF-α treatment. Every subject underwent echocardiography before starting anti-TNF-α drugs and after one year of treatment, to evaluate LV ejection fraction (EF), telediastolic diameter, telediastolic volume and global longitudinal strain (GLS) that was calculated using 2D speckle tracking as the mean GLS from three standard apical views (2, 3 and 4 -chambers). The patients showed a mean age of 43 years at RA onset (SD: 13) and a mean follow-up of 7.3 years (SD: 4.8). Steroid and methotrexate were used in 84.6% and 100%, respectively, in association with etanercept (6 cases), adalimumab (4 cases) and infliximab (3 cases). Results. Patients globally showed a normal EF before and after one year of treatment (mean: 65% and 65.7%, respectively). GLS did not differ before or after anti-TNF-α treatment (mean: -15.8% and -16.7%, respectively). Conclusion. Anti-TNF-α treatment did not significantly modify myocardial contractility after 12 months.

show abstract

“…Many other works [2,[14][15][16][17][18][19] have related to tracking quality indices that have been employed in order to decide whether to include or exclude strain measurements. The commercial vendors usually provide tracking quality indices that state a scoring of "acceptable" or "non-acceptable" segmental strain measurements, with the option of manual corrections.…”

Section: Introductionmentioning

confidence: 99%

Supervised learning approach for tracking quality determination of transmural and segmental time strain curves: A feasibility study

Khamis¹,

Yahav²,

Friedman³

et al. 2017

JBEI

View full text Add to dashboard Cite

Quantitative assessment of global and regional left ventricle function by means of myocardial strain estimation has been widely discussed as promising clinical diagnostic markers of left ventricular malfunction. These markers are provided to the clinicians without much feedback regarding their reliability, which may lead to erroneous diagnosis. Therefore, this study aims to classify the calculated strain curves into reliable or artefactual ones, before their clinical adaptation.A supervised machine learning approach is utilized for the classification process. A total of 6,552 strain curves were used, for which a visual labeling protocol was defined and utilized by two experts.An inter-observer labeling concordance of 93% was obtained, and a classification accuracy of 90% was achieved with a specificity of 92% and sensitivity of 78%.This classification tool may enhance the reliability of the estimations of global, transmural and regional strain curves, by automatically classifying them into physiological or artefactual curves.

show abstract

Automated function imaging: a new operator-independent strain method for assessing left ventricular function

Abstract: AFI is clinically applicable and an effective means of assessing LV function due to its short acquisition time, feasibility and accuracy, whatever the experience of the operator.

Cited by 117 publications

References 22 publications

Evaluation of subclinical left ventricular systolic dysfunction in patients with obstructive sleep apnea by automated function imaging method; an observational study

Evaluation of subclinical left ventricular systolic dysfunction in patients with obstructive sleep apnea by automated function imaging method; an observational study

Left ventricular function in rheumatoid arthritis during anti-TNF-Î± treatment: a speckle tracking prospective echocardiographic study

Supervised learning approach for tracking quality determination of transmural and segmental time strain curves: A feasibility study

Contact Info

Product

Resources

About