Abstract 17921: Diastolic Dysfunction Might Predict Outcomes in Acute Coronary Syndrome Patients Undergoing Primary Percutaneous Coronary Intervention

Introduction: Acute coronary syndrome (ACS) leads to diastolic dysfunction which might cause unfavorable long-term clinical outcomes. We aim to evaluate the association between diastolic parameters in patients with an ACS and event rates including 30-day mortality and 6-month readmission rates.

Methodology: We studied 1579 patients with ACS who underwent primary percutaneous coronary intervention (PCI) from January 1, 2010 through December 31, 2020. Clinical, laboratory, transthoracic echocardiographic (TTE) and coronary angiographic parameters were retrospectively reviewed. Diastolic parameters (E/A ratio, TR velocity, LVEF and LAVI) in patients with left anterior descending artery (LAD) PCI (n=879) were compared with those who underwent PCI to non-LAD artery (n=700). Percentage of 6-month all-cause readmission, cardiogenic shock as well as mortality rates were calculated in both cohorts.

Results: The mean age of 1579 ACS patients was 65

12 years, BMI 29 5 kg/m ² , peak high sensitivity troponin 624 ng/L, E/A ratio 1.065, TR velocity 3.2 m/s, LAVI 34.26 mL/m ² and LVEF 50.1%. The percentage of hospital readmission within 6 months was higher in patients with diastolic dysfunction and LAD PCI compared to those with non-LAD PCI (19% versus 16%, p - value=0.004). Although patients with diastolic dysfunction and LAD PCI had higher percentage of cardiogenic shock compared to non-LAD PCI group (6.0% versus 3.7%, p -value<0.001), 1-year mortality did not differ between the 2 groups ( p -value=0.84).

Conclusion: Diastolic dysfunction is associated with worse clinical outcomes in patients undergoing LAD PCI which warrants a larger prospective clinical study.