AFRICA CARDIOVASCULAR JOURNAL OF AFRICA • SMC-PAFCIC Abstracts October 2022 72 LVFP in patients with ACS, as a single parameter and its additive value to classical consensual parameters. Methods: Our study was led prospectively between April 20, 2022, and June 30, 2022. It included patients with ST elevation (STEMI) or nonST elevation (NSTEMI) myocardial infarction. Echocardiographic measurements were performed in less than 24 hours from admission. Patients were divided into two groups according to LVFP; group 1 with non-elevated LVFP and group with elevated LVFP as defined by ASE/EACVI algorithm. LA-GS was assessed using images obtained in apical 4- and 2-chamber views. Left atrial reservoir strain (LARS) was calculated from LV-end diastole, and pump strain (LAPS) after the onset of the p-wave in the electrocardiogram. Results: Fifty patients were included in our study. The mean age was 59 ± 12 years. 72%(36) of our population was men. 34%(17) of the population had elevated LVFP (Group2) with a male predominance of 82% (14). They were active smokers in 64% (11), 52%(9) had hypertension, 70% (12) had diabetes mellitus, 47%(8) had dyslipidemia and 35% (6) were hospitalized for NSTEMI. The mean LARS and LAPS were 26.9%, and 15.2% in group 1 vs 15.1%, and 7.1% respectively in group 2 with a difference statically significative p=0.001, and p=0.002 respectively. The area under the curve was 0.910 (LARS) and 0.850 (LAPS). The best cut-off for the LAPS was 11.5% with 100% of sensibility and 63% of specificity, for the LACS the best cut-off was 18% with 95% of sensibility and 66% of specificity. Submission ID: 1664 THE CORRELATION BETWEEN 2D GLOBAL LONGITUDINAL STRAIN ECHOCARDIOGRAPHY AND CARDIAC MAGNETIC RESONANCE TO DETERMINE LEFT VENTRICLE MYOCARDIAL SCAR BURDEN (LVMS) IN PATIENTS PRESENTING WITH ACUTE CORONARY SYNDROME (ACS) ASMA BRAHIM, EMNA ALLOUCH, SANA SAID, MOHAMED SELMEN AISSA, HABIB BEN AHMED, HAKIMBEN JEMAA, FATEN BOUDICHE, WEJDENE OUECHTATI, LEILA BEZDAH TUNISIA Introduction: The cartography of the LVMS presents an important diagnostic parameter to predict the prognostic of patients presenting with ACS. Nowadays, late gadolinium enhancement cardiac magnetic resonance (LGE-CMR) remains the cornerstone for the quantification of scars after myocardial infarction. However, echocardiography with Global longitudinal strain by 2-dimensional speckle-tracking (GLS) which is available is the most important first-line technic to evaluate the infarct. Aim: To test the ability of the GLS to quantify LVMS compared to CMR. Methods: We conduct a retrospective study from January 2020 to January 2022. patient attending our cardiology department with an ACS and who had echocardiography and CMR. We compared LVMS between, GLS and CMR findings. The LVMS was defined by LGECMR as a fraction of total left ventricle tissue. GLS was the average peak strain from 16 left ventricle segments. Results: Thirty-three patients were included in our study. The mean LVMS in CMR was 14% +/- 8% while GLS mean was -10% +/- 4%. There was a statically significant difference p=0.010. The CMR of thirty Patients who had severe Left Anterior Descending artery (LAD) stenosis showed a mean scar burden of 42% +/- 30%, while GLS showed -4% +/- 4% with a difference statically significative p=0.001. Besides no statically significant difference between CMR and 2D GLS in patients with right coronary (RCA) artery related infract (13% +/-7%, -9% +/-5% respectively). Although the CMR scar mean in those who had circumflex artery (CX) related infract (17 patients) was 30% +/- 15% versus -8% +/-4% in GLS, with a statically significant difference. (P=0.024). Conclusion: GLS includes a reproducible and simple method for the assessment of scar burden in ACS in lesions in the territory of CX and RCA. Therefore, the CMR is the cornerstone for the quantification of scars after myocardial infarction. Conclusion: LA-GS is useful particularly when considered along with other diastolic parameters, in an acute setting of diastolic function and FP alteration while many other consensual parameters were not accurate in this context. The receiver operating characteristic
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