<strong>Background:</strong> Acute changes in left ventricular diastolic function shortly after ASD closure in elderly patients have not been well known. We aimed to investigate acute changes in left ventricular end diastolic pressure (LVEDP) in elderly patients following transcatheter closure of atrial septal defect (ASD). <br /><strong>Methods:</strong> All 19 adults with ASDs who underwent transcatheter closure between June 2013 and December 2014 were enrolled. LVEDP was measured prior to device closure and compared with that immediately following device closure and 15 minutes after device closure. <br /><strong>Results:</strong> The median age of the patients was 48 years old. The baseline E/e’ and LVEDP values were 8.3 ± 2.8 and 13 ± 3 mmHg. The LVEDP value immediately following closure was 19 ± 4 mmHg, and 15 minutes after closure was 16 ± 4 mmHg. The median increase in the LVEDP value immediately following closure was 6 mmHg, which significantly differed from that prior to closure. The LVEDP 15 minutes after closure decreased but remained significantly higher than the value observed immediately after closure. No significant changes were observed with regard to E/e’ at either 1 day or 3 months following closure. The LVEDP value <br />15 minutes after device closure was significantly correlated with those observed before closure and immediately following closure; however, no significant correlations were observed with regard to patient age, Qp/Qs, E/e’ before closure, or E/e’ 3 months after device closure.<br /><strong>Conclusion:</strong> LVEDP in adults with ASDs significantly increases following device closure. LVEDP before closure predicts LVEDP following device closure.
