OBJECTIVE To establish reference intervals for fetal heart stroke volume and cardiac output with gestation. METHODS Fetal heart ventricular volumes were measured using the four-dimensional (4D) spatiotemporal imaging correlation (STIC) ultrasound technique in 140 normal singleton pregnancies at 12-34 weeks' gestation. The Virtual Organ Computer-aided AnaLysis (VOCAL) technique was used to obt...

expiratory pressure; Phihigh airway pressure level with BiPAP; Plolow airway pressure level with BiPAP; PSVpressure support ventilation; PVRlpulmonary vascular resistance index; RVEDVright ventricular enddiastolic volume; RVEFright ventricular ejection fraction; RVESVright ventricular end-systolic volume; RVPSPright ventricular peak systolic pressure; RVSV right ventricular stroke volume; RVSWI...

Many studies in the literature have clearly shown the increase in creatine kinase-myocardial subfraction (CK-MB) levels and changes in electrocardiography (ECG) after stroke. However, the studies on cardiac troponin T (cTnT) which is more sensitive and specific to myocardium after stroke are relatively scarce. Moreover, its associations with volume of stroke lesions and type of stroke have not ...

BACKGROUND AND PURPOSE We sought to characterize the evolution of acute ischemic stroke by MRI and its relationship to patients' neurological outcome. METHODS Fourteen patients with acute ischemic stroke underwent MRI within 13 hours of symptom onset (mean, 7.4+/-3 hours) and underwent repeated imaging and concurrent neurological examination at 8, 24, 36, and 48 hours and 7 days and >42 days ...

Method Forty-three patients, among them 33 with known mitral regurgitation, underwent electron beam CT and MR imaging. Total left ventricular stroke volume (TSV), antegrade stroke volume (ASV), and mitral regurgitation volume (MRV) and fraction (MRF) were determined and compared between the two modalities. Additionaly electron beam CT measurements were compared with the corresponding echocardio...

The effects on myocardial oxygen consumption and mechanics of acute, simulated aortic and mitral regurgitation were studied in open-chest, anesthetized dogs to determine how changes in the mechanical performance of the ventricle alter oxygen consumption. When regurgitation was induced acutely with effective stroke volume (total stroke volume less regurgitant volume) and heart rate held constant...