BACKGROUND Three-dimensional (3D) echocardiography has been reported to be valuable for evaluating the geometry of cardiac chambers. We validated the accuracy of 3D transthoracic echocardiography for quantifying aortic root geometry in comparison with cardiac multi-detector computed tomography (MDCT). METHODS Twenty-three patients who underwent cardiac MDCT and showed normal left ventricular ...

BACKGROUND AND PURPOSE CFD has been proved valuable for simulating blood flow in intracranial aneurysms, which may add to better rupture risk assessment. However, CFD has drawbacks such as the sensitivity to assumptions needed for the model, which may hinder its clinical implementation. 3D PC-MR imaging is a technique that enables measurements of blood flow. The purpose of this study was to com...

29 Although the distribution of average fetal pulmonary trunk (PT) blood flow favors the ductus 30 arteriosus (DA) over the lungs, the phasic aspects of this distribution during systole and 31 diastole are not well understood. Accordingly, flow profile and wave intensity (WI) analyses 32 were performed at baseline and during brief flow increases accompanying an extrasystole 33 (ES) in ten anest...

BACKGROUND Echocardiographic reference ranges are important to identify abnormalities of cardiac dimensions. Reference ranges for children in sub-Saharan Africa have not been established. The aim of this study was to establish echocardiographic z-score references for Black children in sub-Saharan Africa. METHODS 282 healthy subjects aged 6-16years (143 [51%] males) with no known history of ca...

The pressure-volume curves for 10 patients with various types of heart disease were studied throughout mid to late diastole when both pressure and volume were increasing. The results were used to test a currently held theory that the form of this relation is exponential. It was found that for the patients examined this hypothesis was not valid.

Little direct evidence in man indicates that acute right ventricular loading alters left ventricular configuration. We used the Mueller maneuver (forced inspiration against a closed airway) to increase right ventricular loading and evaluated septal shape and right and left ventricular size in nine normal, semisupine men with phased-array, two-dimensional echocardiography. End-systolic and end-d...

This study was designed to quantify and compare transmural myocardial blood flow in the right and left ventricles of awake dogs during systole and diastole, and during total coronary artery occlusion. Studies were performed in six awake dogs chronically prepared with electromagnetic flowmeters and pneumatic occluders on the left circumflex and right coronary arteries. Intermittent coronary perf...

Physiological and psychological underpinnings of suicidal behavior remain ill-defined and lessen timely diagnostic identification of this subgroup of patients. Arterial stiffness is associated with autonomic dysregulation and may be linked to major depressive disorder (MDD). The aim of this study was to investigate the association between arterial stiffness by photo-plethysmogram (PPG) in MDD w...