| Autor: |
Jonathan Mynard, Lucas Eastaugh, Geoff Lane, Greta Goldsmith, Gabriella Springall, Alberto Avolio, Joe Smolich, Michael Cheung |
| Jazyk: |
angličtina |
| Rok vydání: |
2018 |
| Předmět: |
|
| Zdroj: |
Artery Research, Vol 24 (2018) |
| Druh dokumentu: |
article |
| ISSN: |
1876-4401 |
| DOI: |
10.1016/j.artres.2018.10.180 |
| Popis: |
Objective: To assess whether reservoir pressure (Pres) in young individuals with a compliant aorta is uniform throughout the aorta, as has recently been reported in older adults with cardiovascular disease (1). Methods: High fidelity pressure was measured with a Verrata wire (Philips Volcano) in 5 aortic locations (ascending-to-abdominal) via pull-back in 11 children with a normal aorta (age 10.4 ± 4.9 years, mean ± SD). Pres was calculated using the ‘pressure-only’ approach (2), with exponential fitting over the whole of diastole (1) (WholeDia) or the period when pressure declined in an approximately exponential fashion (ExpDia). Results: ExpDia produced a better fit than WholeDia (R2=0.99 ± 0.01 vs 0.91 ± 0.11, P < 0.001). Pres amplitude (ΔPres) in the ascending aorta from WholeDia fitting (12.0 ± 4.1 mmHg) was less than with ExpDia fitting (19.0 ± 5.2, P = 0.001). The zero-flow asymptotic pressure (Pinf) obtained from the fitting procedure was negative (non-physiological) in 76% (WholeDia) and 44% (ExpDia) of recordings, but fixing Pinf to 37 mmHg (average of physiological values) had little effect on the resulting ΔPres. ΔPres varied by 5.7 ± 3.0 mmHg (WholeDia) and 7.3 ± 3.7 mmHg (ExpDia) between aortic locations (both P |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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