Contributions:
This work was carried out in collaboration between all authors. Author Wassam el din el shafey carried out the data collection and echocardiographic studies, wrote the first draft of the manuscript, and managed the literature searches with the contribution of author Emad Ali Al Khoufi. Authors Wassam el din el shafey did final editing of the manuscript and data analysis. Author Emad Ali Al Khoufi helped in literature retrieval and data analysis. All authors have read and approved the final manuscript.
Acknowledgements: Not applicable.