Author + information
- Sunil Kanwal,
- Isheeka Edwards,
- Mark Russo,
- Bruce Haik,
- Marc Cohen and
- Chunguang Chen
Background: With high resolution live 3-D TEE and 4-D dynamic cardiac CT, anatomic aortic valve area can be directly traced without geometric assumptions and flow calculations. We hypothesize that direct planimetry of AVA either by 3-D TEE or cardiac CT provides a reliable measurement of anatomic AVA and bears a similar correlation to effective functional AVA, calculated by continuity equation on 2-D Doppler echocardiogram (TTE).
Method: A total of 48 patients with aortic stenosis (Age: 78±11, Male: 60%) and adequate quality of 4-D CT or 3-D TEE for planimetry of AVA were studied. 3-D TEE AVA was compared with 4-D CT AVA. Both methods were also compared with conventional AVA by continuity equation on TTE.
Results: 3-D TEE planimetry was possible in 95% and 4-D CT planimetry in 89% of patients. Correlation between 3-D TEE AVA and 4-D CT AVA was very strong (r=0.94, p<0.01). Bland Altman average difference between 3-D TEE AVA and 4-D CT AVA was – 0.07±0.08 cm2. Calculated effective AVA on TTE correlated fairly with 3-D TEE AVA (r=0.56, p<0.05) or 4-D CT AVA (r=0.42, p=0.06).
Conclusions: Aortic valve area measurement by 3-D TEE planimetry and 4-D CT planimetry correlated closely and probably can be used interchangeably. However, correlation between anatomic AVA and effective AVA by continuity equation appears only fair and AVA by continuity equation appears significantly smaller than anatomic AVA.
Poster Hall, Hall C
Friday, March 17, 2017, 3:45 p.m.-4:30 p.m.
Session Title: Emerging Applications of Echocardiography
Abstract Category: 28. Non Invasive Imaging: Echo
Presentation Number: 1160-213
- 2017 American College of Cardiology Foundation