Relationship between systolic time interval measurements and the extent of regional ventricular asynergy in coronary artery disease
Mor, F.; Gotsman, M.S.; Lewis, B.S.
Israel Journal of Medical Sciences 17(12): 1149-1154
1981
ISSN/ISBN: 0021-2180 PMID: 6120149 Document Number: 179090
Systolic time interval (STI) measurements were made in 44 patients with coronary artery disease: 38 had regional left ventricular (LV) asynergy, and the remaining 6 had normal ventricular contraction patterns on left ventricular angiography. There was a significant correlation between both the preejection period (PEP) (r = 0.70) and the PEP/LVET (LV ejection time) ratio (r = 0.66), with the extent of regional ventricular dysfunction measured quantitatively on the left ventricular angiogram (P less than 0.001). A PEP/LVET ratio greater than 0.50 was associated with ventricular asynergy involving more than 40% of the LV circumference at end diastole. STI measurements also correlated with ejection fraction but not with ventricular end diastolic pressure nor with the number of obstructed coronary arteries.