Volume 29, Issue 5, 2020
DOI: 10.24205/03276716.2020.1138
Clinical characteristics and influencing factors of pre-hospital delay of the second acute myocardial infarction
Abstract
Background: Knowledge is limited concerning the clinical characteristics and the influencing factors of pre-hospital delay at the second myocardial infarction in China.
Object: This study was designed to investigate the factors associated with interval of <12 months between the first and second acute myocardial infarction (AMI), the type of symptoms of the first and second AMI and their gender differences, and the factors associated with pre-hospital delay of ≥ 1 hour at the second AMI.
Methods: A retrospective cohort study of 98 patients with a first and a second AMI from Affiliated Hospital of Jiaxing University between January 2014 and January 2020 was conducted. All data of this study were extracted from medical records.
Results: Patients who recurred within one year after the first AMI accounted for 43.9% of all recurrent patients. Without percutaneous coronary intervention (PCI) at the first AMI was an independent risk factor for interval of <12 months between the first and second AMI. Atypical symptoms of the second AMI were less than that of the first AMI, which was significant for males but not for females when comparing men and women separately. Atypical symptoms were independent risk factors for pre-hospital delay of ≥1 hour at the second AMI.
Conclusions: Patients, with two or more AMI, who did not undergo PCI at the first AMI were more likely to recur within one year. Patients (males) with atypical symptoms at the second AMI decreased compared with that of the first AMI. Patients with atypical symptoms had a longer pre-hospital delay at the second AMI.
Keywords
acute myocardial infarction, pre-hospital delay, atypical symptoms, percutaneous coronary intervention