Pressure-volume relationships in the right atrium were examined before and after the creation of acute experimental tricuspid regurgitation in pigs. A 1.3 kHz multielectrode impedance catheter with a measuring current of 4 mA was used to determine instantaneous right atrial pressure and relative blood volume; right atrial dimension was assessed simultaneously with ultrasonic crystals attached t...

Pressure-volume relationships for the total respiratory system and for the lung were recorded in anaesthetized and paralysed patients, during deflation from an airway pressure of 3 kPa to FRC at a rate of 2 litre min-1. Pleural pressure was estimated by means of an oesophageal balloon. A group of nine female patients (mean age 32.7 yr) about to undergo laparoscopy were each studied in four succ...

BACKGROUND The objective of this study is to describe the system and technical factors that enabled our moderate size transhiatal esophagectomy program to achieve low mortality rates. METHODS A retrospective chart review was conducted on 200 consecutive patients who underwent transhiatal esophagectomy at Robert Wood Johnson University Hospital. Primary outcomes included operative times, estim...

Reflexogenic control of vascular capacity was studied by measuring the mean circulatory pressure (PMc) a t various blood volumes. PMC was obtained by fibrillating the heart for 10 seconds and rapidly transferring blood from the aorta to the vena cava until the pressures equilibrated. It was measured 0.5, 2, and 5 minutes after randomized changes in blood volume of 0 to ± 30% of the control volu...

Background Clinical and experimental observations of preand afterload independent indices of impaired cardiac contractile performance and hemodynamic dysfunction are limited by the poor true temporal resolution of cine MRI. We aimed to develop and optimize for the first time an imaging and reconstruction protocol for MRI real time measurement of cardiac pressure-volume relations and to compare ...

the aim of current study was to determine women´s maternal asthma in pregnancy, delivery and birthl outcomes. using a retrospective cohort design, data of 580 pregnant women were gathered form a large teaching hospital in tehran, iran. the medical records of pregnant women who had attended this hospital between 2009 and 2011 were assessed. data of delivery and birth outcomes were gathered by ob...

conclusions results of this study could be applied to designing interventions, such as promotion of preventive beliefs or educational programs regarding premarital sexual relationships in conservative societies. these interventions could start within families and continue at schools and universities. objectives the aim of this study was to explore the viewpoints of sexually active single women ...