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The ratio of early transmitral flow velocity (E) to early mitral annular velocity (Em) predicts improvement in left ventricular systolic and diastolic function 1 year after catheter ablation for atrial fibrillation

 In-Soo Kim  ;  Tae-Hoon Kim  ;  Chi-Young Shim  ;  Hee-Sun Mun  ;  Jae Sun Uhm  ;  Boyoung Joung  ;  Geu-Ru Hong  ;  Moon-Hyoung Lee  ;  Hui-Nam Pak 
 Europace, Vol.17(7) : 1051-1058, 2015 
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AIMS: Successful rhythm control after atrial fibrillation catheter ablation is known to induce left atrial reverse remodelling and improve left ventricular (LV) function. We explored the clinical factors affecting LV systolic and diastolic function 1-year after catheter ablation for atrial fibrillation. METHODS AND RESULTS: We compared pre-procedural and 1-year follow-up echocardiograms in 521 patients with atrial fibrillation who underwent catheter ablation. Left ventricular systolic function was estimated by the ejection fraction (EF); diastolic function was estimated by the ratio of early transmitral flow velocity (E) to early mitral annular velocity (Em). (i) Catheter ablation of atrial fibrillation significantly reduced left atrium volume index (P < 0.001) and improved LV EF both in patients with recurrent atrial fibrillation (n = 133, P = 0.008) and those without recurrence (n = 388, P < 0.001). (ii) Follow-up EF was significantly improved in patients with baseline E/Em < 15 (n = 454, P < 0.001), whereas E/Em was significantly reduced in patients with pre-procedural E/Em ≥ 15 (n = 67, P = 0.008). (iii) Baseline E/Em < 15 (β = -3.854, 95% CI -5.99 to -1.72, P < 0.001), baseline EF <50% (β = 10.586, 95% CI 7.55 to 13.63, P < 0.001), and female (β = -1.726, 95% CI -3.36 to -0.10, P = 0.038) were independently associated with improved EF. Baseline E/Em ≥ 15 (β = 4.896, 95% CI 3.45 to 6.34, P < 0.001) and younger age (β = -0.066, 95% CI -0.11 to -0.02, P = 0.003) were independent factors associated with improved E/Em. CONCLUSION: Pre-procedural E/Em predicted improvement in LV systolic and diastolic functions 1 year after catheter ablation for atrial fibrillation. Low baseline E/Em was independently associated with improved EF, while high E/Em predicted improvement in LV diastolic function.
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1. Journal Papers (연구논문) > 1. College of Medicine (의과대학) > Dept. of Internal Medicine (내과학교실)
Yonsei Authors
김인수(Kim, In-Soo) ORCID logo https://orcid.org/0000-0003-2801-5514
김태훈(Kim, Tae-Hoon) ORCID logo https://orcid.org/0000-0003-4200-3456
문희선(Mun, Hee Sun)
박희남(Pak, Hui Nam) ORCID logo https://orcid.org/0000-0002-3256-3620
심지영(Shim, Chi Young)
엄재선(Uhm, Jae Sun) ORCID logo https://orcid.org/0000-0002-1611-8172
이문형(Lee, Moon Hyoung) ORCID logo https://orcid.org/0000-0002-7268-0741
정보영(Joung, Bo Young) ORCID logo https://orcid.org/0000-0001-9036-7225
홍그루(Hong, Geu Ru)
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