Abstract
Aim: Coronary artery dominance influences the amount and anatomic location of myocardium that is perfused by the left or right coronary circulation. However, the association between coronary arterial dominance and the QRS axis on 12-lead surface electrocardiography (ECG) was not investigated. The present study aims to evaluate the relationship between coronary arterial dominance and the QRS axis on ECG in patients without significant coronary artery and structural cardiac disease.Material and Methods: Overall, 133 patients, without significant CAD and who met the inclusion criteria, participated in this study. A standard surface 12-lead ECGs were performed in all study patients. QT interval, QTc interval, QRS duration, PR interval, P wave and QRS axis were determined. Based on the origin of the posterior descending coronary artery, coronary circulation was categorised into left, right, and balanced coronary dominance.Results: There were 133 subjects with 56 right dominant (42%), 39 left dominant (29%) and 38 codominant (29%) pattern. QRS axis value was found to be significantly higher in the left dominant group when compared with the codominant and right dominant group (p˂0.05). No significant difference was observed between the codominant and right dominant groups regarding QRS axis values. The axis of (+30)-(+90) ratio in the left dominant group was found to be significantly higher when compared with the codominant and right dominant group (p˂0.05). No significant difference was observed between the codominant and right dominant groups regarding the axis of (+30)-(+90) ratio. Conclusion: Our findings suggested that the QRS axis may be related to coronary artery dominance
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
