Echocardiographic measurements of the left ventricular minor axis highly correlated with angiographic dimensions (r=0.85-0.87) and volumes (r=0.83-0.84), allowing accurate volume prediction.
Observational (n=27)
Does echocardiography accurately predict left ventricular volumes compared to biplane angiocardiography in patients with diverse cardiac abnormalities?
Echocardiographic measurement of the left ventricular minor axis can accurately predict left ventricular volumes using linear regression formulae, whereas the cube function overestimates volumes in larger hearts.
Effect estimate: r = 0.85 to 0.87
We compared dimensions of the left ventricular minor axis (S) measured at enddiastole (S D ) and end-systole (S S ) by echocardiography with dimensions and left ventricular volumes measured by biplane angiocardiography in 27 patients with diverse cardiac abnormalities. There were high correlations between echographic and angiographic ventricular minor-axis dimensions (r = 0.85 for S D and 0.87 for S S ), between echographic dimensions and ventricular volumes (r = 0.84 for end-systolic volume ESV and S S , 0.83 for end-diastolic volume EDV and S D ), and between the relative change in the echographic minor axis with systole (% Δ S) and ejection fraction (r = 0.79). Regression formulae were derived from these relationships which allowed calculation of ventricular volumes from echo dimensions alone: ESV = 47 S D —120, EDV = 59 S D —153. These equations allowed relatively accurate prediction of volumes over a wide range of ventricular sizes. The use of a cube function of the echographic minor axis was an accurate predictor of volumes only in smaller ventricular chambers, but overestimated volumes in larger hearts.
Fortuin et al. (1971) conducted an observational in Diverse cardiac abnormalities (n=27). Echocardiography vs. Biplane angiocardiography was evaluated on Correlation between echographic and angiographic ventricular minor-axis dimensions and volumes (r = 0.85 to 0.87). Echocardiographic measurements of the left ventricular minor axis highly correlated with angiographic dimensions (r=0.85-0.87) and volumes (r=0.83-0.84), allowing accurate volume prediction.