Extraction of left-ventricular torsion angle from the long-axis view by block-matching algorithm: Comparison with the short-axis view

Ultrasonics ◽  
2013 ◽  
Vol 53 (2) ◽  
pp. 552-560 ◽  
Author(s):  
Zahra Arab-Baferani ◽  
Manijhe Mokhtari-Dizaji ◽  
Farideh Roshanali
Keyword(s):  
Left Ventricular ◽  
Block Matching ◽  
Short Axis ◽  
Short Axis View ◽  
Matching Algorithm ◽  
Block Matching Algorithm ◽  
Left Ventricular Torsion ◽  
Algorithm Comparison ◽  
Ventricular Torsion ◽  
Axis View

scholarly journals Sex-related Left Ventricle Rotational and Torsional Mechanics by Block Matching Algorithm

2016 ◽  
Author(s):  
M H Bahreini Toosi ◽  
H Zarghani ◽  
H Poorzand ◽  
Sh Naseri ◽  
A Eshraghi ◽  
...  
Keyword(s):  
Left Ventricle ◽  
Speckle Pattern ◽  
Twist Angle ◽  
Left Ventricular ◽  
Block Matching ◽  
P Value ◽  
Short Axis ◽  
Men And Women ◽  
Matching Algorithm ◽  
Block Matching Algorithm

Background: The aim of the present study was to evaluate how left ventricular twist and torsion are associated with sex between sex groups of the same age.Materials and Methods: Twenty one healthy subjects were scanned in left ventricle basal and apical short axis views to run the block matching algorithm; instantaneous changes in the base and apex rotation angels were estimated by this algorithm and then instantaneous changes of the twist and torsion were calculated over the cardiac cycle.Results: The rotation amount between the consecutive frames in basal and apical levels was extracted from short axis views by tracking the speckle pattern of images. The maximum basal rotation angle for men and women were -6.94°±1.84 and 9.85°±2.36 degrees (p-value = 0.054), respectively. Apex maximum rotation for men was -8.89°±2.04 and for women was 12.18°±2.33 (p-value < 0.05). The peak of twist angle for men and women was 16.78 ± 1.83 and 20.95± 2.09 degrees (p-value < 0.05), respectively. In men and women groups, the peak of calculated torsion angle was 5.49°±1.04 and 7.12± 1.38 degrees (p-value < 0.05), respectively.Conclusions: The conclusion is that although torsion is an efficient parameter for left ventricle function assessment, because it can take in account the heart diameter and length, statistic evaluation of the results shows that among men and women lv mechanical parameters are significantly different. This study was mainly ascribed to the dependency of the torsion and twist on patient sex.

Identification of gender differences in the thickness of the left ventricular wall by echocardiography in children

2002 ◽  
Vol 12 (1) ◽  
pp. 37-43 ◽  
Author(s):  
Hiroyuki Nagasawa ◽  
Yoshio Arakaki
Keyword(s):  
Gender Differences ◽  
Left Ventricular ◽  
Left Ventricular Wall ◽  
Ventricular Wall ◽  
Short Axis ◽  
Short Axis View ◽  
Normal Left Ventricular ◽  
Dimensional Echocardiography ◽  
Two Dimensional Echocardiography ◽  
Axis View

We assessed the thickness of the normal left ventricular wall according to gender by performing twodimensional echocardiography in children. While a few studies have evaluated left ventricular wall thicknesses in children using two-dimensional echocardiography, there is little information related to the influence of gender throughout childhood. We evaluated 251 patients (128 males and 123 females) with innocent murmurs but without congenital heart anomalies, or coronary artery lesions or arrhythmias, as determined by repeated echocardiographic, and electrocardiographic examinations. Intra-ventricular septal thicknesses at end-diastole and end-systole, and left ventricular posterior thicknesses at end-diastole and end-systole were determined in the parasternal short-axis view. Significant gender differences were observed in the thickness of all four measurements. There was a linear relationship between the thickness of the left ventricular wall and height. Height was the most appropriate and practical index for assessing the thickness of the wall of the left ventricle in children.

scholarly journals Ventricular Remodeling in Aortic Sclerosis

2020 ◽  
Vol 17 (4) ◽  
pp. 21-33
Author(s):  
Elena Mihaela Mihu ◽  
Alexandru Cristian Nechita ◽  
Costel Sorin Stamate ◽  
Rodica Lucia Avram ◽  
Laura Logofătu Cârstocea ◽  
...  
Keyword(s):  
Ventricular Remodeling ◽  
Left Ventricular Remodeling ◽  
Left Ventricular ◽  
Short Axis ◽  
Short Axis View ◽  
Ventricular Geometry ◽  
Cardiovascular Morbidity And Mortality ◽  
Increased Risk ◽  
Aortic Sclerosis ◽  
Axis View

AbstractBackground and aims. Aortic sclerosis associates an increased risk of cardiovascular morbidity and mortality. Recent studies suggest that aortic sclerosis is able to produce ventricular remodeling through inflammatory, non-hemodynamic mechanisms. Our study aims to evaluate the correlation between ventricular remodeling and aortic sclerosis severity.Method. 68 patients with aortic sclerosis without other signifficant associated valvulopathies were examined clinically, biologically and echocardiographic. In 20 patients, we quantiffied the severity of aortic valve calciffication using the backscatter ecographic technique, in parasternal long and short axis view. Backscatter values obtained at the valvular level were calibrated to the blood and pericardium backscatter values.Results. In the 68 patients group, transvalvular aortic velocity correlates with left ventricular mass (p =0.031), which in turn incline to augment with increasing calciffication severity assessed by backscatter. Calciffication severity assessed by backscatter corellates with transvalvular aortic velocity in parasternal long axis view (p =0.039 for blood calibrated backscatter, p =0.029 for pericardium calibrated backscatter), and tends to augment with increasing transvalvular aortic velocity in parasternal short axis view. Patients with normal ventricular geometry incline to have lower aortic transvalvular velocities and a lower degree of calciffication (evaluated by backscatter) compared to patients with ventricular remodeling.Conclusions. Aortic sclerosis is not benign, and may lead, in time, to left ventricular remodeling. With the progression of valvular calciffications in aortic sclerosis patients, the prevalence of ventricular remodeling tends to increase.

The Improvement of Torsion Assessed by Cardiovascular Magnetic Resonance Feature Tracking after Coronary Artery Bypass Grafting: A Sensitive Index of Cardiac Function

2017 ◽  
Vol 20 (1) ◽  
pp. 026 ◽  
Author(s):  
Nan Cheng ◽  
Liuquan Cheng ◽  
Rong Wang ◽  
Lin Zhang ◽  
Changqing Gao
Keyword(s):  
Cardiovascular Magnetic Resonance ◽  
Magnetic Resonance ◽  
Ejection Fraction ◽  
Cardiac Function ◽  
Feature Tracking ◽  
Artery Bypass ◽  
Left Ventricular ◽  
Rapid Acquisition ◽  
Left Ventricular Torsion ◽  
Ventricular Torsion

Objective: The aim of this study was to quantify left ventricular torsion by newly applied cardiovascular magnetic resonance feature tracking (CMR-FT), and to evaluate the clinical value of the ventricular torsion as a sensitive indicator of cardiac function by comparison of preoperative and postoperative torsion.Methods: A total of 54 volunteers and 36 patients with previous myocardial infarction (MI) and LV ejection fraction (EF) between 30%-50% were screened preoperatively or postoperatively by MRI. The patients’ short axis views of the whole heart were acquired, and all patients had a scar area >75% in at least one of the anterior or inferior segments. Their apical and basal rotation values were analyzed by feature tracking, and the correlation analysis was performed for the improvement of LV torsion and ejection fraction after CABG. The intra- and inter-observer reliabilities of torsion measured by CMR-FT were assessed.Results: In normal hearts, the apex rotated counterclockwise in the systolic period with the peak rotation as 10.2 ± 4.8°, and the base rotated clockwise as the peak value was 7.0 ± 3.3°. There was a timing hiatus between the apex and base untwisting, during which period the heart recoils and its suction sets the stage for the following rapid filling period. The postoperative torsion and rotation significantly improved compared with preoperative ones. However, the traditional indicator of cardiac function, ejection fraction, didn’t show significant improvement.Conclusion: Left ventricular torsion derived from CMR-FT, which does not require specialized CMR sequences, was sensitive to patients with low ejection fraction whose cardiac function significantly improved after CABG. The rapid acquisition of this measurement has potential for the assessment of cardiac function in clinical practice. 

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