Search PubMed⌕ Search

SEARCH · Search PubMed

Results for “Cardiac Volume”

Search indexed PubMed citations on genomics, clinical trials, systematic reviews and public health. Explore titles, authors and supplied subject terms, then open the PubMed record.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

At least 109 records · Page 6Linked to original sources
PubMed1996

Digital ventriculography: valid on-line calculation of cardiac volumes by corrected computer densitometry in coronary artery disease.

Cardiac catheterization facilitates the assessment of left ventricular function in coronary artery disease (CAD). Digital left ventriculography offers the potential for an on-line quantitative determination of left ventricular end-diastolic volume (LVEDV) and left ventricular end-systolic volume (LVESV). These are routinely evaluated by the area-length method (ALM), which is considered as a standard. Densitometry (DENS) is an alternative method but may lead to calculated underestimations. The purpose of this study was to investigate the accuracy of corrected DENS for LVEDV and LVESV in comparison with ALM in single-plane 30 degrees right anterior oblique (RAO) projection. The computer densitometric correction equation was adapted from the linear regression analysis (y = 0.86x + 2.73) in cardiac models and applied to the analysis of digital left ventriculograms in patients suffering from CAD. The study of cardiac models yielded highly significant correlations (r > or = 0.9; P < or = 0.001) between true volumes and both DENS and ALM. DENS and ALM correlated highly significantly (r > or = 0.9; P < or = 0.001) with a low standard error of estimate (SEE) of +/-9.5 mL. The comparison of DENS and ALM in 44 patients' digital ventriculograms exhibited highly significant (r = 0.74; P < or = 0.001) correlations for noncorrected and corrected LVEDV. Systematic underestimation by DENS of LVEDV disappeared after correction and SEE decreased from +/-23.7 to +/-19.2 mL. DENS and ALM correlated highly significantly for LVESV (r = 0.78; P < or = 0.001; SEE +/- 15.6 mL +/- 13.5 mL, respectively) after correction. Following correction, mean values for DENS increased from 116 +/- 32 to 132 +/- 37 mL (LVEDV) and 50 +/- 22 to 55 +/- 25 mL (LVESV). For ALM, mean values decreased from 159 +/- 35 to 127 +/- 28 mL (LVEDV) and 55 +/- 25 to 46 +/- 21 mL (LVESV). This study shows that LVEDV and LVESV can be reliably analyzed on-line by corrected computer densitometry. Method-related errors of both DENS and ALM are present and account for minor volume deviations.

Aged↗
PubMed1990

[The importance of a teleradiographic evaluation of cardiac volume in subjects with the long QT syndrome].

The increase in electrocardiographic QT interval, denominated "long QT" syndrome, is related to syncopes and sudden death during anger, fear, physical effort, or sleep. Its diagnosis is important because mortality rate is high among untreated patients. In this study the author tried to single out, with the help of conventional radiology, some radiological elements belonging to this syndrome. Heart diameters and volume could be determined by means of teleroentgenography in 24 patients affected with "long QT" syndrome. The method employed considerably reduced the factors preventing a correct determination of heart size. In most of the cases examined, heart diameters and volume were increased, the heart had a globose shape with a lifted tip, the second right arch was accentuated, and the space behind the sternum reduced: these elements suggest a volumetric increase in the right sections of the heart. No relationship was found between QT value and increase in heart size. The results suggest the existence of a non-casual relationship between electrocardiographical anomaly and increase in the volume of the right sections of the heart.

Adolescent↗