Current Perioperative Anticoagulation Practices in Children with Prosthetic Mechanical Heart Valves

Nguyen, Nguyenvu T; Sharathkumar, Anjali

doi:10.1111/chd.12268

Cited by 5 publications

(1 citation statement)

References 26 publications

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“…Many pediatric LT centers have developed anticoagulation practices based on principals extrapolated from the adult liver and the pediatric cardiac literature and clinical practice experience . More than 100 centers are approved to perform pediatric LT in the United States.…”

Section: Introductionmentioning

confidence: 99%

Perioperative anticoagulation practices for pediatric liver transplantation

Voulgarelis

Vitola

Lerret

et al. 2018

Pediatric Transplantation

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Despite continued advancements in perioperative care for pediatric liver transplant (LT), graft-threatening vascular occlusion events including hepatic artery thrombosis (HAT) and portal vein thrombosis (PVT) remain a source of significant morbidity and mortality. Perioperative anticoagulation is commonly used for the prevention of HAT and PVT, but evidence-based guidelines are lacking. The goals of this survey were to determine the frequency of use of an anticoagulation protocol and to describe variation in anticoagulation practices among pediatric LT centers. The study consisted of an online survey distributed to members of SPLIT. The survey focused on institutional anticoagulation practices employed to reduce the incidence of graft and life-threatening vascular occlusion events. Responses were received from 31 of 39 SPLIT centers. All respondents report using anticoagulation after pediatric LT, and approximately 90% have institutional anticoagulation protocols. Subgroup analysis of high volume pediatric LT centers revealed similar variability in anticoagulation patterns. All participating SPLIT centers reported the use of post-transplant anticoagulation and nearly all use a protocol. However, there is marked variability in the type and dose of anticoagulation as well as the timing of initiation and duration of therapy across centers.

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Section: Introductionmentioning

confidence: 99%

Perioperative anticoagulation practices for pediatric liver transplantation

Voulgarelis

Vitola

Lerret

et al. 2018

Pediatric Transplantation

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Marked Practice Variation in Antithrombotic Care with the Berlin Heart EXCOR Pediatric Ventricular Assist Device

et al. 2019

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Management of antithrombotic therapy (ATT) for pediatric ventricular assist devices is challenging, and the Berlin EXCOR remains the only Food and Drug Administration (FDA)-approved option. Among those on the EXCOR, 28% have neurologic complications and major bleeding occurs in 50%. The Edmonton Protocol was developed to guide ATT, but the adverse event rate remains high, leading most centers to make modifications. The objective of this study is to characterize antithrombotic practice variation among North American pediatric ventricular assist device programs, in order to guide future research. In this descriptive cross-sectional study, a survey assessing antithrombotic (AT) practices was distributed by Berlin Heart Inc. to centers that implanted ≥1 EXCOR between January 2012 and January 2016. Practices were compared at high- versus low-volume centers. High volume was defined as ≥14 implants in this period. Seventeen of 38 centers (44.7%) participated; 4 were high volume. At half of all centers (9/17), ≤2 clinicians managed all AT decisions. Although 47.1% (8/17) followed the protocol “extremely/very closely,” only 5.9% (1/17) felt it to be “very effective.” Most centers (10/15; 66.7%) deviated in ≥2 protocol aspects. Over half modified either recommended antiplatelet agents (5/15) or anticoagulants (4/15). Adjunct medication use was highly variable. Most (11/17; 64.7%) deviated from protocol in either timing or type of AT lab monitoring. Despite widespread use of Thromboelastography (TEG)/Platelet Mapping (PM), concerns of inaccuracy were common. Most high-volume centers (3/4; 75%) abandoned TEG/PM as a primary tool. These practice variation analyses have identified areas in ATT that are amenable to care standardization and further research. Systematic study of optimal AT medication dosing and monitoring is needed.

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Mechanical mitral valve endurance in children under 2 years

Mashali,

Elmahrouk,

Ahmad

et al. 2024

Cardiothorac Surg

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Background The management of mitral valve disease in young children is challenging. Mechanical mitral valves could provide long-term durability; however, the need for anticoagulation increases the risk profile of mechanical valves. We report our experience in mechanical mitral valve replacement (MVR) in children under 2 years of age and evaluate factors affecting the outcomes. The study included all patients younger than 2 years who underwent mechanical MVR between 2000 and 2023. The study outcomes were mitral valve reoperation, bleeding, valve-related thrombosis, and survival. Results Twenty-three patients were included, with a mean age of 10.2 ± 5.9 months. The mitral valve sizes ranged from 16 to 25 mm, and 6 (26%) were placed in the supra-annular position. Complete heart block occurred in seven patients (30%), and operative mortality occurred in three patients (13%). Postoperative warfarin was used in 17 patients (74%). After discharge, bleeding occurred in five patients (22%), four were managed conservatively, and one had intracranial hemorrhage treated with craniotomy. Nine patients (39%) had valve-related thrombosis; two underwent reoperation, while seven were treated with alteplase in 26 patients. Valve-related thrombosis was more common in patients with supra-annular valves (p < 0.001) and in those who were not on warfarin (p < 0.001). A total of seven patients (30%) underwent redo MVR, and redo was more common in young patients (p = 0.029) and in patients with supra-annular valves (p < 0.001). Survival of the whole cohort was 73% at 5 years. Among the annular position group, 5-year survival was 88%, while among the supra-annular position group, survival was 50% after 3 months and 25% after 14 months (p = 0.009). Conclusions Mechanical MVR in children younger than 2 years is associated with high complication rates, including thrombosis and bleeding. The supra-annular valve position appears to be a risk factor for thrombosis and reoperation. Anticoagulation with warfarin remains challenging. However, further studies evaluating alternative options are needed. Graphical Abstract

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Current Perioperative Anticoagulation Practices in Children with Prosthetic Mechanical Heart Valves

Cited by 5 publications

References 26 publications

Perioperative anticoagulation practices for pediatric liver transplantation

Perioperative anticoagulation practices for pediatric liver transplantation

Marked Practice Variation in Antithrombotic Care with the Berlin Heart EXCOR Pediatric Ventricular Assist Device

Mechanical mitral valve endurance in children under 2 years

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