RT Journal Article SR Electronic T1 Dynamic left atrial echo contrast in rheumatic mitral stenosis JF BMJ Case Reports JO BMJ Case Reports FD BMJ Publishing Group Ltd SP e251284 DO 10.1136/bcr-2022-251284 VO 15 IS 8 A1 Ramanathan Velayutham A1 Chinmay Parale A1 Saurav Banerjee A1 Ahamed Shaheer Ahmed YR 2022 UL http://casereports.bmj.com/content/15/8/e251284.abstract AB