Sigmoid shaped interventricular septum exhibit normal myocardial characteristics and has a relationship with aging, ascending aortic sclerosis and its tilt to left ventricle

Right ventricular basal inflow and outflow tract diameters overestimate right ventricular size in subjects with sigmoid-shaped interventricular septum: a study using three-dimensional echocardiography

“…A sigmoid septum (also denoted as ventricular septal bulge or angled aorta) is considered a normal variant or a minor abnormality often encountered in echocardiographic examinations of the elderly [12][13][14][15]23]. Sometimes, distinguishing between the SS and hypertrophic cardiomyopathy can be problematic because SS can cause an LV outflow tract obstruction [24][25][26][27][28].…”

“…Sigmoid-shaped ventricular septum (SS), a frequently encountered minor abnormality in echocardiographic examinations of the elderly [12][13][14][15], may alter not only left ventricular (LV) shape but also RV shape. In the present study, we aimed to determine the influence of SS on the accuracy of the 6 RV linear diameter measurements as well as the RV end-diastolic area, which was also introduced in the ASE/EACVI guidelines, in the light of three-dimensional echocardiographic (3DE) RV volume.…”

Clinical features of the systolic anterior motion of the mitral valve among patients without hypertrophic cardiomyopathy

“…We showed that non-HCM with SAM is related to older age and sigmoid septum. Sigmoid septum is a facet of the normal aging process, in which the base of the interventricular septum protrudes into the left ventricular cavity [25,33]. Some investigators reported that LVOT obstruction could occur in the patients with a sigmoid septum and hyperkinetic condition, causing SAM [34,35].…”

“…LV wall motion was evaluated as normal, hypokinetic, akinetic, dyskinetic, and aneurysm [23,24]. The sigmoid septum was defined by an angle between the ascending aorta and the basal portion of inter ventricular septum of less than 1208 in the parasternal long-axis view at diastole [25]. The clinical diagnosis of HCM was made using 2-dimensional echocardiography.…”

Harmful effect of epinephrine on postreperfusion syndrome in an elderly liver transplantation recipient with sigmoid ventricular septum

“…[1,3] Because an SVS is frequently observed on echocardiography and has no clinical implications in most subjects, not much attention may have been paid to this feature in daily clinical practice. [4] However, in certain clinical circumstances, an SVS has been reported to cause left ventricular outflow tract (LVOT) obstruction, which may result in a severe hemodynamic derangement. [3,5,6] …”