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Variation in management of paediatric isolated bicuspid aortic valve: current practice survey

Published online by Cambridge University Press:  04 May 2021

Jesse M. Boyett Anderson*
Affiliation:
Department of Pediatrics, University of Wisconsin, Madison, WI, USA
John S Hokanson
Affiliation:
Department of Pediatrics, Division of Pediatric Cardiology, University of Wisconsin, Madison, WI, USA
*
Author for Correspondence: Jesse M. Boyett Anderson, MD, Department of Pediatrics, University of Wisconsin Hospitals and Clinics, 600 Highland Ave, Madison, WI 53792, USA. Tel: (608) 262-8785. E-mail: boyettanders@wisc.edu
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Abstract

Background:

Prior to the recent release of appropriate use criteria for imaging valvulopathies in children, follow-up of valvular lesions, including isolated bicuspid aortic valve, was not standardised. We describe current follow up, treatment, and intervention strategies for isolated bicuspid aortic valve with varying degrees of stenosis, regurgitation, and dilation in children up to 18 years old and compare them with newly released appropriate use criteria.

Methods:

Online survey was sent to members of the American Academy of Pediatrics Section on Cardiology and Cardiac Surgery and PediHeartNet.

Results:

Totally, 106 responses with interpretable data were received. For asymptomatic patients with isolated BAV without stenosis, regurgitation, or dilation follow-up-intervals increased from 7+/−4 months in the newborn period to 28 +/− 14 months at 18 years of age. Respondents recommended more frequent follow-up for younger patients and those with greater disease severity. More than 80% of respondents treat aortic regurgitation or aortic dilation in the setting of bicuspid aortic valve medically. In general, intervention was recommended once stenosis or regurgitation became severe (stenosis of >4 m/s; regurgitation with LV Z score 4) regardless of age, but was not routinely recommended for younger children (newborn – age 6 years) with severe dilation. Exercise was restricted at 38+/−11 mmHg echocardiographic mean gradient.

Conclusions:

Current follow-up, treatment, and intervention strategies for isolated bicuspid aortic valve deviate from appropriate use criteria. Differences between the two highlight the need to better delineate the disease course, clarify recommendations for care, and encourage wider adoption of guidelines.

Information

Type
Original Article
Creative Commons
Creative Common License - CCCreative Common License - BY
This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited.
Copyright
© The Author(s), 2021. Published by Cambridge University Press
Figure 0

Table 1. Definitions of severity of aortic disease

Figure 1

Table 2. Participant characteristics

Figure 2

Figure 1. Follow-up intervals. Recommended interval of follow-up in months for patients with isolated BAV and varying degrees of AS (panel A), AR (panel B) and AD (panel C). AD = aortic dilation, AR = aortic regurgitation, AS = aortic stenosis.

Figure 3

Figure 2. Indications for Intervention. Percent of clinicians recommending surgical or catheter-based intervention at different ages in patients with isolated BAV and varying degrees of AS, AR, and AD. AD = aortic dilation, AR = aortic regurgitation, AS = aortic stenosis.

Figure 4

Table 3. Intervention or exercise restrictions in asymptomatic patients with aortic stenosis

Figure 5

Table 4. Medication recommended for management of aortic regurgitation and aortic dilation

Figure 6

Figure 3. Medications used in BAV. Percent of those clinicians who ever use medications for the treatment of AR and AD who recommend each of four common antihypertensives: ACEi, ARB, beta blockers, CCB. ACEi = angiotensin converting enzyme inhibitor, AD = aortic dilation, AR = aortic regurgitation, ARB = angiotensin receptor blocker, AS = aortic stenosis, CCB = calcium channel blocker.

Figure 7

Table 5. Timeline of recommended* frequency of imaging for management of aortic lesions

Figure 8

Figure 4. Clinician follow-up vs. AUC. Comparison of clinician recommendations with AUC recommendations for follow-up interval of patients with isolated BAV with AS (panel A) and AR (panel B). Survey data shown as a means for each age and degree of valvular dysfunction. AUC guidelines shown as shaded areas representing the range of intervals over which follow-up is recommended at each age for patients with mild (red) and moderate (blue) valvular dysfunction. AR = aortic regurgitation, AS = aortic stenosis, AUC = appropriate use criteria.

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