Limits...
Central aortic valve coaptation area during diastole as seen by 64-multidetector computed tomography (MDCT).

Zeb I, Mao SS, Hamirani YS, Raina S, Kadakia J, Elamir S, Budoff MJ - Int J Cardiovasc Imaging (2010)

Bottom Line: The aortic valve coaptation area (mm(2)) measurement in patients without AR was: 4.90 ± 0.17 and in patients with AR: 10.53 ± 0.26 (P ≤ 0.05).On Bland-Altman analysis a very good correlation between central aortic valve coaptation area and central ROA was found (r = 0.80, P ≤ 0.001).Central aortic valve coaptation area is a central area present at the coaptation of nodules of arantius of aortic cusps during diastole; it is incompetent and increased in size in patients with aortic regurgitation.

View Article: PubMed Central - PubMed

Affiliation: Los Angeles Biomedical Research Institute at Harbor-UCLA, Torrance, CA 90502, USA.

ABSTRACT
As multiple new procedures now require better visualization of the aortic valve, we sought to better define the central aortic valve coaptation area seen during diastole on multi-detector row cardiac computed tomography (MDCT). 64-MDCT images of 384 symptomatic consecutive patients referred for coronary artery disease evaluation were included in the study. Planimetric measurements of this area were performed on cross-sectional views of the aortic valve at 75% phase of the cardiac cycle. Planimetric measurement of central regurgitation orifice area (ROA) seen in patients with aortic regurgitation and Hounsfield units of the central aortic valve coaptation area were performed. Mean area of the central aortic valve coaptation area was 5.34 ± 5.19 mm(2) and Hounsfield units in this area were 123.69 ± 31.31 HU. The aortic valve coaptation area (mm(2)) measurement in patients without AR was: 4.90 ± 0.17 and in patients with AR: 10.53 ± 0.26 (P ≤ 0.05). On Bland-Altman analysis a very good correlation between central aortic valve coaptation area and central ROA was found (r = 0.80, P ≤ 0.001). Central aortic valve coaptation area is a central area present at the coaptation of nodules of arantius of aortic cusps during diastole; it is incompetent and increased in size in patients with aortic regurgitation.

Show MeSH

Related in: MedlinePlus

Central aortic valve coaptation area as seen on MDCT scan
© Copyright Policy
Related In: Results  -  Collection


getmorefigures.php?uid=PMC2991237&req=5

Fig1: Central aortic valve coaptation area as seen on MDCT scan

Mentions: Central aortic valve coaptation area is identified as circular to triangular shape area present centrally in the aortic valve during diastolic phases. It is visualized as a hypodense structure on contrast enhanced MDCT scans. Planimetric measurements of this area were performed on cross sectional images of the aortic valve (as shown in Fig. 1). Hounsfield units in this area were also measured. This central coaptation area is closed in normal persons, visualized as no contrast present in this area. In patients with aortic regurgitation, this area is incompetent and is visualized as regurgitant orifice area (ROA) (as shown in Fig. 2). Planimetric measurement of the ROA when observed was also performed in crosses sectional views of the aortic valve at 75% phase of the R-R interval (Fig. 2) [5].Fig. 1


Central aortic valve coaptation area during diastole as seen by 64-multidetector computed tomography (MDCT).

Zeb I, Mao SS, Hamirani YS, Raina S, Kadakia J, Elamir S, Budoff MJ - Int J Cardiovasc Imaging (2010)

Central aortic valve coaptation area as seen on MDCT scan
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC2991237&req=5

Fig1: Central aortic valve coaptation area as seen on MDCT scan
Mentions: Central aortic valve coaptation area is identified as circular to triangular shape area present centrally in the aortic valve during diastolic phases. It is visualized as a hypodense structure on contrast enhanced MDCT scans. Planimetric measurements of this area were performed on cross sectional images of the aortic valve (as shown in Fig. 1). Hounsfield units in this area were also measured. This central coaptation area is closed in normal persons, visualized as no contrast present in this area. In patients with aortic regurgitation, this area is incompetent and is visualized as regurgitant orifice area (ROA) (as shown in Fig. 2). Planimetric measurement of the ROA when observed was also performed in crosses sectional views of the aortic valve at 75% phase of the R-R interval (Fig. 2) [5].Fig. 1

Bottom Line: The aortic valve coaptation area (mm(2)) measurement in patients without AR was: 4.90 ± 0.17 and in patients with AR: 10.53 ± 0.26 (P ≤ 0.05).On Bland-Altman analysis a very good correlation between central aortic valve coaptation area and central ROA was found (r = 0.80, P ≤ 0.001).Central aortic valve coaptation area is a central area present at the coaptation of nodules of arantius of aortic cusps during diastole; it is incompetent and increased in size in patients with aortic regurgitation.

View Article: PubMed Central - PubMed

Affiliation: Los Angeles Biomedical Research Institute at Harbor-UCLA, Torrance, CA 90502, USA.

ABSTRACT
As multiple new procedures now require better visualization of the aortic valve, we sought to better define the central aortic valve coaptation area seen during diastole on multi-detector row cardiac computed tomography (MDCT). 64-MDCT images of 384 symptomatic consecutive patients referred for coronary artery disease evaluation were included in the study. Planimetric measurements of this area were performed on cross-sectional views of the aortic valve at 75% phase of the cardiac cycle. Planimetric measurement of central regurgitation orifice area (ROA) seen in patients with aortic regurgitation and Hounsfield units of the central aortic valve coaptation area were performed. Mean area of the central aortic valve coaptation area was 5.34 ± 5.19 mm(2) and Hounsfield units in this area were 123.69 ± 31.31 HU. The aortic valve coaptation area (mm(2)) measurement in patients without AR was: 4.90 ± 0.17 and in patients with AR: 10.53 ± 0.26 (P ≤ 0.05). On Bland-Altman analysis a very good correlation between central aortic valve coaptation area and central ROA was found (r = 0.80, P ≤ 0.001). Central aortic valve coaptation area is a central area present at the coaptation of nodules of arantius of aortic cusps during diastole; it is incompetent and increased in size in patients with aortic regurgitation.

Show MeSH
Related in: MedlinePlus