High–Frame-Rate Tissue Harmonic Imaging Enhances Anatomic M-Mode Sections of the Left Ventricle in Short-Axis View

Palmes, Patricio; Masuyama, Tohru; Yamamoto, Keiji; Kondo, Hiroya; Sakata, Yasushi; Takiuchi, Shin; Kuzuya, Tsunehiko; Hori, Masatsugu

doi:10.1067/mje.2000.104649

Cited by 14 publications

(9 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This helped us to distinguish between longitudinal and radial measurements of ventricular timing. AMM was chosen because of its high frame rate 18. All participating patients gave informed consent and use of the data was approved by the hospital’s human research ethics committee.…”

Section: Methodsmentioning

confidence: 99%

Measurement of left ventricular dyssynchrony in patients with ischaemic cardiomyopathy: a comparison of real-time three-dimensional and tissue Doppler echocardiography

Burgess

Jenkins

Chan

et al. 2007

Heart

View full text Add to dashboard Cite

Background: Real-time three-dimensional echocardiography (RT3DE) is an alternative modality to tissue Doppler imaging (TDI) for assessment of intraventricular dyssynchrony but its role is yet to be defined. Objectives: To (1) compare RT3DE and TDI for assessment of intraventricular dyssynchrony; (2) determine whether the two techniques agreed regarding the magnitude of dyssynchrony and identification of the site of maximal mechanical delay; and (3) investigate the reason for disagreement. Patients: 100 patients with ischaemic cardiomyopathy. Setting: Tertiary referral cardiac unit. Main outcome measures: Dispersion in time interval from QRS onset to peak sustained systolic tissue velocity by TDI (SD-T TV ) and to minimal systolic volume by RT3DE (SD-T 3D ) between 12 ventricular segments. Results: RT3DE image quality was adequate for measurement of SD-T 3D in 77 (77%) patients. In the whole population, SD-T TV was 40 (20) ms and SD-T 3D was 8.3% (3.4%). RT3DE identified a smaller proportion of patients as having significant dyssynchrony than TDI (49 (64%) patients vs 32 (42%) patients; p,0.01). The correlation between SD-T TV and SD-T 3D was poor (r = 0.11, p = NS). There was concordance between TDI and RT3DE in identifying the site of maximal mechanical delay in 12 (16%) patients. Validating the two techniques with anatomical M-mode (AMM) as a parameter of radial timing revealed better agreement with RT3DE than with TDI (x 2 = 11.8, p = 0.001). Conclusion: In patients with ischaemic cardiomyopathy, TDI and RT3DE show poor agreement for evaluating the magnitude of intraventricular dyssynchrony and the site of maximal mechanical delay. This may partly relate to their respective assessment of longitudinal versus radial timing.

show abstract

Section: Methodsmentioning

confidence: 99%

Measurement of left ventricular dyssynchrony in patients with ischaemic cardiomyopathy: a comparison of real-time three-dimensional and tissue Doppler echocardiography

Burgess

Jenkins

Chan

et al. 2007

Heart

View full text Add to dashboard Cite

show abstract

“…Mitral regurgitation was not detected with the hand-carried device in a patient in whom the standard echo study revealed mitral regurgitation only in late systole. In most of the recent high-end echo systems, frame rate is doubled or tripled by the use of parallel receiving technique, which has made it easy to detect valve regurgitation limited only in a part of systole or diastole [6,7]. The presence of mitral regurgitation was confirmed in the patient when the DCPD study was repeated after the completion of the standard echo study.…”

Section: Standard Echo Total Reg (+)mentioning

confidence: 83%

“…Quality of echo images is difficult to assess in an objective fashion, but it was not better in the hand-carried device than in the standard machine, probably due to the difference in the display size. Better quality of echo images makes the examiner comfortable, and tissue harmonic imaging, if loaded, might help in this context in the near future [4][5][6]. Valve regurgitation.…”

Section: Standard Echo Total Reg (+)mentioning

confidence: 99%

Hand-Carried Echocardiography in Assessing Ventricular Function and Valvular Regurgitation

et al. 2004

Self Cite

View full text Add to dashboard Cite

“…The enhanced conspicuity of the endocardial–blood pool interface in harmonic imaging studies translates into a high‐quality AMM image. Although we did not specifically attempt to examine the influence of harmonic imaging on image quality, previous studies have demonstrated the superiority of harmonic‐generated AMM studies vs. those based on the fundamental frequency 9,10 …”

Section: Discussionmentioning

confidence: 99%

Assessment of Cardiac Chamber Size Using Anatomic M‐mode

Oyama

Sisson

2005

Vet Radiology Ultrasound

View full text Add to dashboard Cite

Anatomic M-mode (AMM) is an echocardiographic technique that is capable of generating M-mode studies from two-dimensional (2D) cine loops. Unlike conventional M-mode (CMM) whose scan line must lie along the axis of the ultrasound signal, AMM produces M-mode studies independent of the orientation of the ultrasound beam. We sought to determine the ability of AMM to measure cardiac dimensions in normal dogs and to assess the accuracy and variability of AMM and CMM vs. 2D measurements. Thirty-eight healthy dogs underwent physical exam and 2D, CMM, and AMM echocardiographic studies. The end-diastolic and end-systolic dimension of the left ventricle and the diameter of the left atrium (LAD) and aortic root were evaluated from the right parasternal short- and long-axis views. Results of the AMM and CMM study were compared with the 2D study via linear regression and calculation of a coefficient of correlation. AMM increased the level of correlation with both the left ventricular dimensions and LAD. Bland-Altman analysis revealed that AMM increased the level of agreement with 2D measurements and CMM greatly underestimated LAD vs. AMM. In healthy dogs, cardiac AMM measurements are associated with greater accuracy and less variability than CMM. AMM has the potential to improve quantification of cardiac dimensions.

show abstract

High–Frame-Rate Tissue Harmonic Imaging Enhances Anatomic M-Mode Sections of the Left Ventricle in Short-Axis View

Cited by 14 publications

References 20 publications

Measurement of left ventricular dyssynchrony in patients with ischaemic cardiomyopathy: a comparison of real-time three-dimensional and tissue Doppler echocardiography

Measurement of left ventricular dyssynchrony in patients with ischaemic cardiomyopathy: a comparison of real-time three-dimensional and tissue Doppler echocardiography

Hand-Carried Echocardiography in Assessing Ventricular Function and Valvular Regurgitation

Assessment of Cardiac Chamber Size Using Anatomic M‐mode

Contact Info

Product

Resources

About