Right Ventricular Ejection Function Assessed by Cineangiography. Importance of Bellows Action.

Right Ventricular Systolic Function and the Manner of Transformation of the Right Ventricle in Patients With Dilated Cardiomyopathy

“…[6][7][8][9] The present result that the group with DCM had no significant difference in the RV end-diastolic volume index, a larger RV end-systolic volume index and a lower RVEF than the control group means that the difference in the RV volume can be explained by the transformation of the 3 dimensions. Because the %shortening of the SF was largest among the 3 dimensions in most cases, the RVEF was affected most.…”

“…7 The shortening of the F-MP in DCM was less than in the controls, but the motion of the S-MP was the same between the 2 groups. Therefore, the changes in the shortening of the SF in DCM cannot be explained by a direct interaction between the right and left ventricles via the ventricular septum in systole.…”

“…Contrast medium (iopamidol 75.52%) was injected into the RV through the catheter at a rate of 12-13 ml/s for 3 s. outline was determined visually and traced by hand, then digitized with a magnetic cursor (KD 4300; NEC, Tokyo, Japan) and the geometric data were stored on a floppy disk. The ventricular volume was calculated using Simpson's rule 10 and converted to the true volume by the equation of Ishigaki et al: [6][7][8][9] y=0.87x -4.8, where x is the volume (ml) by Simpson's rule and y is the true RV volume (ml). From this analysis, we drew a volume -time curve for the RV over one cardiac cycle, and determined the RV end-diastolic volume at the maximal volume and the RV end-systolic volume at the minimal volume.…”

“…[6][7][8][9] (1) In the right anterior oblique view, the long axis dimension (LA) was defined as the distance from the midpoint between the anterior side of the pulmonary valve and the inferior side of the tricuspid valve to the apex.…”

“…After LV cineangiography (right anterior oblique 30°) and coronary angiography, biplane RV cineangiography was performed with 35-mm cine film at a rate of 50 frames/s in a steep left anterior oblique view projection perpendicular to this projection using a Nishiya's catheter via the right femoral vein as previously reported. [6][7][8][9] We chose an angle for the left anterior oblique view in which the interventricular septum was seen best by biventriculography and in all patients it was 45°. In this projection, the 2 bent portions of the Nishiya's catheter appeared to overlap closely as if in a straight line.…”