OBJECTIVE To evaluate the dynamic filling index, a novel parameter to monitor changes in venous return and drainable volume, in circulatory assisted patients. Minimized extracorporeal bypass systems lack volume buffering capacity, demanding tight control of drainable volume to maintain bypass flow. Therefore, with patients on minimized bypass quantitative assessment of venous drainable volume i...

In 16 patients with hypertrophic cardiomyopathy, an acute response of the left ventricular end-diastolic pressure and volume index to intravenously administered verapamil was assessed. Verapamil decreased the left ventricular end-diastolic pressure from 20 +/- 6 to 17 +/- 5 mm Hg(p less than 0.001) and increased the end-diastolic volume index from 82 +/- 22 to 91 +/- 23 ml/sqm (p less than 0.01...

introduction : to evaluate the efficacy of niti mechanical rotary instrumentation and hedstrom file for gutta-percha/sealer removal computed tomography (ct) was utilized in vitro . materials and methods: thirty extracted human single rooted teeth, each with a single canal were selected. the samples were decoronated with a double faced diamond disk to have 17-mm root; teeth roots were instrument...

STUDY OBJECTIVES To investigate the importance of early left ventricular (LV) diastolic filling on maintenance of exercise performance, we examined peak filling rate and its relation to exercise capacity during upright bicycle exercise in patients with recent myocardial infarction. DESIGN Retrospective analysis of data of cardiopulmonary exercise testing characteristics in patients with recen...

This study used micro-computed tomography (micro-CT) to evaluate the fit of the master gutta-percha cone at time of cone fit, gutta-percha volume in the filling material, and the filling material volume in relation to the canal at the apical limit of the working length. Root canals of 20 maxillary central incisors were prepared with rotary instruments and distributed into two groups (n=10). The...

BACKGROUND Diastolic filling at rest is altered markedly with advancing age. Whether exercise training can improve diastolic filling at rest or during exercise in either healthy older or healthy young men has not been determined. The purpose of this study was to determine if 6 months of aerobic exercise training improves diastolic filling. METHODS AND RESULTS Radionuclide diastolic filling pa...

TAYLOR, ROGER R., JAMES W. COVELL, EDMUND H. SONNENBLICK, AND JOHN Ross, JR. Dependence of ventricular distensibility on jilling of the opposite ventricle. Am. J. Physiol. 2 13 (3) : 7 1 l-7 18. 1967.-The influence of filling one ventricle on distensibility of the opposite ventricle was examined in dogs. Distensibility of the left or right ventricle was consistently decreased in proportion to t...

BACKGROUND Esophageal pressure (Pes) can provide information to guide mechanical ventilation in acute respiratory failure. However, both relative changes and absolute values of Pes can be affected by inappropriate filling of the esophageal balloon and by the elastance of the esophagus wall. We evaluated the feasibility and effectiveness of a calibration procedure consisting in optimization of b...

To characterize the mechanical properties of the contracting left ventricle, we studied the changes in left ventricular systolic pressure following step-like perturbations (+/- 3 ml) in ventricular volume, using an isovolumically beating, isolated canine heart preparation. Three mechanical properties (elasticity, resistance, and a deactivation effect) were identified. The elastic property diffe...