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Subject: search.filters.subject.coronary artery bypass grafting

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    Myocardial Function after Coronary Artery Bypass Grafting in Patients with Preoperative Preserved Left Ventricular Ejection Fraction-The Role of the Left Ventricular Longitudinal Strain
    (MDPI AG, 2023-05-12)
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    Risteski, Petar
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    Popov, Aron Frederik
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    Shokarovski, Marjan
    Background and Objectives: The role of coronary artery bypass grafting (CABG) on postoperative left ventricular (LV) function in patients with preoperatively preserved left ventricular ejection fraction (LVEF) is still being discussed and only a few studies address this question. This study aimed to assess LV function after CABG in patients with preoperatively preserved LVEF using left ventricular longitudinal strain assessed by 2D speckle tracking imaging (STI). Materials and Methods: Fifty-nine consecutive adult patients with coronary artery disease (CAD) referred for a first-time elective CABG surgery were enrolled in the final analysis of this prospective single-center clinical study. Transthoracic echocardiography (TTE), with conventional measures and STI measures, was performed within 1 week before CABG as well as 4 months after surgery. Patients were divided into groups based on their preoperative global longitudinal strain (GLS) value. Differences in systolic and diastolic parameters between groups were analyzed. Results: Preoperative GLS was reduced (GLS < -17%) in 39% of the patients. Parameters of systolic LV function were significantly reduced in this group of patients compared to the patient group with GLS% ≥ -17%. In both groups, 4 months after CABG there was a decline in LVEF but statistically significant only in the group with GLS% ≥ -17% (p = 0.035). In patients with reduced GLS, there was a statistically significant postoperative improvement (p = 0.004). In patients with preoperative normal GLS, there was not a significant change in any strain parameters after CABG. There was an improvement in diastolic function parameters measured by Tissue Doppler Imaging (TDI) in both groups. Conclusions: There is improvement in LV systolic and diastolic function after CABG in patients with preserved preoperative LVEF measured by STI and TDI. GLS might be more sensitive and effective than LVEF for monitoring improvements in myocardial function after CABG surgery in patients with preserved LVEF.
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    CORONARY ARTERY BYPASS GRAFTING PORTENDS DECREASED RIGHT VENTRICULAR FUNCTION
    (Macedonian Association od Anatomists, 2020-07-03)
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    Sokarovski, M
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    Lazovski, N
    Decreased right ventricular (RV) function is a frequently observed phenomenon after coronary artery bypass grafting (CABG) that often implicated poor long term prognosis. The aim of this study was to assess the existence of RV dysfunction 4 to 6 months after CABG using echocardiographic Assessment of tricuspid annular plane systolic motion (TAPSE) and RV free wall longitudinal strain (RVFWS) using speckle tracking. During the period from October 2017 to October 2018, forty-seven consecutive patients undergoing CABG were enrolled in this prospective study. 2D transthoracic echocardiography was performed within one week before CABG as well as 4 to 6 months after surgery. All measurements were made by a single experienced investigator.4-6 months after CABG right atrial (RA)and RV dimensions were significantly increased although the mean value stayed in reference margins. TAPSE was significantly reduced (p=0.0001) as well as RVFWS (p=0.015) which showed fewer negative results implicating decrement in RV function after surgery. Patients with abnormal postoperative RVFWS had insignificantly larger preoperative end-diastolic and end-systolic volume index as well as worse left ventricular (LV)function manifested with lower LV ejection fraction (LVEF), lower systolic volume index (SVI) and more positive LV global longitudinal strain.We could not find any significant difference among preoperative values of RA and RV dimension as well as TAPSE and PAPs between patients with normal vs. abnormal postoperative RVFWS. Our study showed depressed RV function 4-6 months after CABG. We suggest that RV free wall strain could be obtained and should be applied along with other conventional markers in the assessment of RV function after CABG.