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Ectopic atrial rhythm after superior septal approach to the mitral valve — an often under-reported entity

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Indian Journal of Thoracic and Cardiovascular Surgery Aims and scope Submit manuscript

Abstract

Purpose

Very few reports elaborate on the changes in P wave following superior septal approach to the mitral valve. We aimed to describe the changes in the P wave axis and other electrocardiographic changes following this approach among patients preoperatively in sinus rhythm.

Methods

We did a retrospective review of medical records among all our patients undergoing superior septal approach for mitral valve surgery from September 2014 to September 2019. Electrocardiograms during hospital stay and until 6-month follow-up were analyzed. A deviation in P wave axis from the normal range of + 30 to + 60° was classified as ectopic atrial rhythm.

Results

In the study population of 47 patients (age 16–75 years, 51.3 ± 13.6 years; M:F ratio 3.7:1), who were in normal sinus rhythm preoperatively, 34 patients (72.3%) had a visible P wave on electrocardiogram (ECG) at discharge. Among them, the P wave axes of 17 patients (36.2%) were within normal range (normal sinus rhythm), whereas 17 patients (36.2%) had ectopic atrial rhythm at discharge. The most frequent abnormal P wave axis was between 0 and − 30° (12 patients). At 6 months, 8 patients (17.0%) had a persistent ectopic atrial rhythm. These patients underwent a Holter test at 6 months and were followed up for symptomatic bradycardia for 3 years. None of the patients with ectopic atrial rhythm required pacemaker insertion.

Conclusion

Persistence of ectopic atrial rhythm at 6 months is common (17%) after superior septal approach. Documentation of P wave axis after this approach will help avoid missing it. These patients may be kept on follow-up to look for symptomatic bradycardia.

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Data Availability

The datasets generated during and/or analysed during the current study are available from the corresponding author on reasonable request, after permission from Sree Chitra Tirunal institute of Medical Sciences, Thiruvananthapuram, India.

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Acknowledgements

Dr Biju Soman MD, Dr Gurpreet Singh MD, Dr Biju George MD, Dr Vincy Sabu MD, Jayakumar, for help with statistical analysis.

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Authors

Contributions

All authors contributed to the study conception and design. Material preparation, data collection, and analysis were performed by Atul Abraham. The first draft of the manuscript was written by Atul Abraham and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

Corresponding author

Correspondence to Atul Abraham.

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Approval was obtained from the Ethics Committee at SCTIMST, which waived the need for patient consent.

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Waived off by the Ethics Committee as no patient identifying material was used.

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There was no infringement of human or animal rights in this study.

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Abraham, A., Panicker, V.T., Mohanan Nair, K.K. et al. Ectopic atrial rhythm after superior septal approach to the mitral valve — an often under-reported entity. Indian J Thorac Cardiovasc Surg 39, 340–349 (2023). https://doi.org/10.1007/s12055-022-01471-7

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