Assessment of Left Atrial Phasic Volumes and Functions During Third Trimester of Healthy Pregnancy

Abstract

Background: Conception represents a physiological progression associated with adaptations in the structure, blood flow dynamics, and operational aspects of the cardiac response to temporary alternation in both preload and afterload. Ventricular volume and LA dimensions gradually and continuously increase due to increasing cardiac output and preload. The increased volume burden during the last trimester aggravates the possible cardiovascular disorders. Limited echocardiographic information exists on left atrium (LA) volume and function during the third trimester of standard conception among Iraqi women. Aim: To estimate the capacity and functionality of the left atrium throughout the last trimester of standard conception. Methods: This research was carried out on 75 normal gravid females (cases ) and 75 nonpregnant females (control ); women were given attention at Al-Furat Teaching Hospital from the 1 of April 2022 to the 30 of May 2023, the comprehensive 2D echocardiographic study had been done for each one of them. Results: Pregnant women category revealed a high noteworthy rise in left atrial maximum volume LA Max, left atrial minimum volume (LA Min) and pre-atrial volume (LA Pre- A) hn contrast to nonpregnant women group vs. vs. and vs. respectively. As well, the study showed that in pregnant women group there is high significant increase in Left atrium reservoir capacity, Left atrium conduit role and LA booster duty vs. vs. vs. contrasted with control. Additionally, the total emptying fraction% , LA Active ejection fraction % significantly higher in pregnant women than the control , vs. while the LA Passive EF% had no significant difference between pregnant women about control . Conclusion: In normal gravid females in the last trimester, there is an increase in LA volumes(LA maximum volume, LA minimum volume, and LA pre-A volumes) and enhancement in LA reservoir capacity, conduit role, and booster functions by using 2DE, which can quickly assess LA phasic volumes and function.