Color-coded measures of myocardial velocity throughout the cardiac cycle by tissue Doppler imaging to quantify regional left ventricular function
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2012, Egyptian Heart JournalCitation Excerpt :Recently, cardiovascular autonomic neuropathy (CAN) has been weakly linked with LV diastolic dysfunction.14 Tissue Doppler imaging (TDI) has been evolved as the most sensitive tool for quantitative assessment of both regional and global left ventricular (LV) systolic and diastolic function.15,16 In the present study we aimed to investigate the effect of presence or absence of cardiovascular autonomic neuropathy (CAN) on left ventricular (LV) systolic and diastolic function in normotensive type 1 diabetic patients using both conventional and tissue Doppler echocardiography.
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2011, Ultrasound in Medicine and BiologyCitation Excerpt :Using a similar experimental setup to that used by Hsu et al. (2007) but relying on velocimetry, Bouchard et al (2009b) generated mechanical waves in the LVFW of an in vivo canine heart during diastole and measured wave speeds that ranged from 0.82–2.65 m/s. Successfully implementing such an approach in a clinical setting, however, would be challenging. If velocimetry is to be achieved in the heart, the method’s increased sampling times (milliseconds to tens of milliseconds) could prove to be too long for certain points of the cardiac cycle, during which uniaxial tissue velocities in excess of 25 mm/s during both systole and diastole are observed (Gorcsan et al. 1996). In addition, lateral motion could jeopardize the assumed spatial continuity of the method’s relatively large data kernels (3.2 mm2 in this study).