For the understanding of the developmental significance of various parts of the normal ventricular septum, 54 normal human embryos and 154 mature heart specimens showing different types of VSD’s and AV canal malformation were studied. The pars interventriculare of the septum membranaceum is derived primarily from the right superior and inferior tubercies of the AV cushions. The pars atrioventri...

We present a 29-year-old woman who was admitted to the emergency department with shortness of breath. Using echocardiography, a giant multi-cystic mass was detected in the right ventricle, attached to the septal leaflet of the tricuspid valve and basal portion of the interventricular septum. Serologic tests (hydatid cyst antibody) confirmed Echinococcus infection. Lung computed tomography with ...

BACKGROUND Left ventricular septal (LVS) pacing reduces ventricular dyssynchrony and improves cardiac function relative to right ventricular apex (RVA) pacing in animals. We aimed to establish permanent placement of an LVS pacing lead in patients using a transvenous approach through the interventricular septum. METHODS AND RESULTS Ten patients with sinus node dysfunction scheduled for dual-ch...

A completely asymptomatic 60-year-old man presented for a preventive calcium score screening. ECG-gated non–contrast-enhanced cardiac computed tomography showed a noncalcified hypodense oval mass in the right ventricle with a spontaneously hyperdense wall measuring 19×17 mm (Figure 1A). Echocardiography was performed and found a 16×18 mm egg-shaped hypoechoic mass with regular hyperechoic borde...

Abnormal systolic interventricular septal motion is an echocardiographic manifestation of right ventricular volume overload. In order to determine the anatomical basis for this echocardiographic finding, septal motion recorded by left lateral or left anterior oblique ventriculograms was compared with echocardiography ventricular septal motion. Thirteen patients with secundum atrial septal defec...

INTRODUCTION Chronic stimulation of the right ventricle with pacemaker is associated with ventricular dyssynchrony and loss of contractility, even in subjects without previous dysfunction. In these patients, there is a debate of which pacing site is less associated with loss of ventricular function. OBJECTIVE To compare pacemaker-induced dyssynchrony among different pacing sites in right vent...

In the article titled “Thrombosed Congenital Aneurysm of the Membranous Interventricular Septum” by Ana Garrido Martín and José M. Oliver,1 the text states: “Although it has been speculated that membranous septum aneurysms may be an intracardiac source of emboli, this is the first case to our knowledge in which transesophageal echocardiography has detected a thrombosed aneurysm of the membranou...

OBJECTIVE Transmural heterogeneity in the ventricular free wall, enhanced by the midmyocardial long action potential duration (APD) of M cells, plays an important role in the arrhythmogenesis of long QT syndrome. Although we observed dynamic expression of M cell phenotypes in the canine ventricular free wall, it is still unclear whether similar phenomena are present in the interventricular sept...

Echocardiographic characteristics of the interventricular septum (IVS) have been studied in eight patients with chronic constrictive pericarditis (CP). Values of septal thickening (ST) were clearly below normal in all cases. Interventricular septal systolic motion (IVSSM) was normal in four cases, hypokinetic in three and paradoxical in one. In seven out of the eight patients, an early interven...