Regional three-dimensional geometry and function of left ventricles with fibrous aneurysms. A cine-computed tomography study.

Abstract

Background. To assess the extent and nature of the dysfunction surrounding aneurysms of the left ventricle (LV), we examined the parameters of local and global three-dimensional shape, size, and

Peri-infarct dysfunction in post-myocardial infarction: assessment of 3-T tagged and late enhancement MRI

“…The earlier time to peak radial, circumferential and efficient strain and the relatively greater peak circumferential strain were seen as altered contractile function and activation in the border zone. These changes in mechanical activation were accompanied by enhanced systolic myocardial shortening in the regions comprising the infarct interface (border region), an area known for heightened mechanical stress [23][24][25], altered metabolism [26], increased inflammatory activity, and cell apoptosis well beyond infarct healing [27]. Fernandes et al revealed that enhanced border zone function defined as greater peak strain and earlier time to peak strain showed a positive correlation to ventricular tachycardia inducibility in patients with previous MI [8].…”

Beneficial effects of endoventricular circular patch plasty in patients with left ventricular systolic dysfunction and left ventricular dyskinetic or akinetic apical segment

“…Patients also have had worse functional status at the time of hospitalization for surgery as indicated by moderate-severe NYHA class for HF. This is supported [16][17][18][19][20][21][22][23][24] Endoventricular patch that the global LV dysfunction characteristic of LV remodeling was associated with increased wall stress in the adjacent non-infarcted region. Lessick and colleagues (1991) 18 demonstrated elevated wall stress and reduced wall thickening in the border zone (BZ) region i.e.…”

“…For continous variables, results were obtained by applying t test to find the change in characteristics from baseline levels. Difference from baseline levels, [16][17][18][19][20][21][22][23][24] Endoventricular patch hence effect of the surgical treatment, was considered statistically significant, if the probability value (P) was found to be less than 0.05 (P<0.05).…”

“…pulse rate, systolic and diastolic blood pressure were measured in patient's seating position with elbow at the level of heart. [16][17][18][19][20][21][22][23][24] diameter were measured using four-chamber and twochamber views with apical approach at the level of papillary muscle. Severity of mitral valve regurgitation (MR) was determined using color Doppler assessment.…”

Computer system for four-dimensional transesophageal echocardiographic image reconstruction

“…With the advances in image processing techniques, it has become one of the most important tools for routine clinical services. It has now been applied not only to the assessment of cardiac functions [1][2][3], but also to the basic study of the morphology and dynamic alternation of the heart [4][5][6].…”