Introduction: The presence of supraventricular tachyarrhythmia (SVT) causes structural and functional changes over a period. The aim of our study is to assess the changes in structural and functional echocardiographic parameters following cardiac catheter ablation (CA) for SVT to see if correction of arrhythmia and restoration of sinus rhythm using CA leads to reverse remodeling. Methods: A single center retrospective analysis was performed on patients undergoing CA for SVT between January 2019 and April 2020. Pre- and post-ablation left ventricular end-diastolic volume (LVEDV), left ventricular end-systolic volume (LVESV), left atrial volume index (LAVI), left atrial dimension (LAD), left ventricular ejection fraction (LVEF) and left ventricular wall thickness were measured. The cohort was sub-grouped into arrhythmia free (AF) and arrhythmia recurrence (AR) patients. Paired student’s t test was performed to compare mean volumes and differences in pre- and post-ablation parameters amongst AF and AR patients. Results: 51 (67.1%) out of a total of 76 patients were AF and 25 (32.9%) had AR based on electrocardiogram done at or around the time of post- ablation echocardiogram. In AF patients there was a statistically significant decrease in post-ablation LVEDV, LVESV, LAVI, and LAD [LVEDV: Post-117 vs Pre- 124 (p=0.002), LVESV: 59 vs 67 (p=0.002), LAVI: 34 vs 38 (p=0.034), and LAD: 3.9 vs 4 (p=0.006)] and increase in LVEF [51 vs 49 (p=0.004)], whereas AR patients had higher post-ablation volumes [LVEDV: 118 vs 108 (p=0.015) and LVESV: 53 vs 50 (p=0.0001)]. [Figure 1] Conclusions: Our findings were significant for decreases in LVEDV, LVESV and LAVI following successful CA of SVT indicating reversal of cardiac remodeling. Importantly, there was an improvement in LVEF. Our study indicates that CA and restoration of sinus rhythm causes improvement in ejection fraction and is important to consider early CA to treat patients in heart failure from tachyarrhythmias.