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Severe Left Ventricular Dysfunction Earlier after Acute Myocardial Infarction Treated with Primary Percutaneous Coronary Intervention: Predictors and In-Hospital Outcome- A Middle Eastern Tertiary Center Experience.

UNLABELLED: Improving or maintaining heart function following percutaneous coronary intervention (PPCI) is not identified in all patients. Our aim in the current study is to investigate the prevalence, factors associated with early left ventricular (LV) dysfunction following successful revascularization of myocardial infarction patients.

METHODS: A single-center retrospective study included 2863 myocardial infarction patients who were admitted to our center and treated with successful PPCI.

RESULTS: Out of 2863 consecutive patients who underwent PPCI from May 2018 to August 2021, 1021 (36%) developed server LV dysfunction. They showed a higher history rate of ischemic heart disease and previous revascularization before AMI (P = 0.05 and 0.001 respectively). Also, they presented more with anterior myocardial infarction (P < 0.001) and heavy thrombus burden (P = 0.002 and 0.004 for indication of peri-procedural glycoprotein IIb/IIIa inhibitors use and thrombus aspiration) compared to the other group of patients. Moreover, they also had a more critical anatomy of coronary artery disease (P < 0.001 for both left main and multi-vessel coronary artery disease). The independently associated predictors for early severe LV dysfunction post-AMI treated with PPCI were anterior localization of AMI, the greater value of troponin, renal impairment, and severe coronary artery disease (P= <0.001, 0.036, 0.002, and <0.07 respectively). Despite optimal treatment for those patients, they showed poor outcomes including in-hospital morbidity and mortality (P < 0.001).

CONCLUSION: Sizable proportion of patients following successful PPCI develop severe LV systolic dysfunction and associated with poor clinical outcomes. Larger myocardial infarction, renal impairment, and severe coronary artery disease are independent predictors of severe LV systolic dysfunction post-PPCI.

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