COMPARATIVESTUDYBETWEEN TWO-DIMENSIONAL AND REAL TIME THREE-DIMENSIONAL ECHOCARDIOGRAPHYFORASSESSMENTOFLEFT VENTRICULARSYSTOLIC FUNCTION IN LEFTBUNDLEBRANCHBLOCK POPULATION.
DOI:
https://doi.org/10.48047/Keywords:
leftbundlebranchblock,leftventricularejectionfraction,systolicdyssynchronyindex,threedimensionaltransthoracicechocardiographyAbstract
Aims:
Evaluatetheroleof systolic dyssynchrony index (SDI), measured by real time three dimensional echocardiography (RT3DE), in
assessment of LVEF and left ventricular volumes accurately in patients with LBBB.
Methods and Results: In this case–control study, we included 65 enrolled participants with LBBB either with normal
LVEF or depressed LV systolic function with isolated WMAs of LBBB only . Left ventricular ejection fraction (LVEF) and
left ventricular volumes were assessed by 2DE (modified Simpson’s method) and RT3DE (four beats full volume
acquisition and sequential analysis) echocardiography and the effect of SDI on results was evaluated. In patients with SDI
≥7%, LVEF measurements were significantly different (45.61% [34%-66 %] vs 37.18% [24 %– 55.6 %], P value<.0001)
between 2DE and RT3DE respectively. In patients with SDI < 7%, no significant differences between two modalities in
terms of LVEF measurements (46.73% [35% -57 %] vs 44.58% [33.4 % –55.6%], P = .158) between 2DE and RT3DE
respectively. LV diastolic volumes were not significantly different while systolic volumes were higher by RT3DE, and this
results were mainly with higher SDI (more than or equal 7)
Conclusion:InpatientswithLBBBandhighSDI(≥7%),LVEFvalueswerelower andsystolicvolumeswerehigher byreal time three
dimensionalechocardiographycomparedtotwo dimensionalechocardiography.
