Pathological Q wave as an indicator of left ventricular ejection fraction in acute myocardial infarction
Abstract: Q-wave myocardial
infarction (QMI) has higher mortality and lower myocardial viability than
non-Q-wave myocardial infarction (NQMI), suggesting the existence of
pathological Q waves reflects the worse ventricular function. The aim of the
study is to determine difference in left ventricular ejection fraction (LVEF)
between QMI and NQMI.
Methods: The study design was cross-sectional analysis conducted in
patients with AMI that were hospitalized and undergone echocardiography in
Abdul Wahab Sjahranie County General Hospital Samarinda during February 2014 to
March 2015. Standard 12-lead electrocardiograms (ECG) were recorded at
presentation, 1 day and 2 days after the onset of AMI as well as using the
classical criteria for pathological Q wave. LVEF assessment was performed using
echocardiography after the second day since the onset of AMI. Independent-T
test was used to determine difference in LVEF using PSPPIRE 0.8.4.
Results: There were 34 subjects comprising 16 QMI patients and 18 NQMI
patients. QMI had a lower LVEF (42±13%)
compared to NQMI (60±11%, p<0.001). The presence of pathological Q waves was
associated with LVEF ≤40% (p=0.002).
Conclusion: QMI had a lower LVEF than NQMI, provides information about
the role of pathological Q wave as an indicator of LVEF.
Author: Muhammad S. Tiyantara,
Muhammad Furqon, Swandari Paramita
Journal Code: jpkedokterangg160138
