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Table of Contents   
EDITORIAL  
Year : 2022  |  Volume : 15  |  Issue : 2  |  Page : 109-113
Pediatric interventional cardiology: Breaking new grounds


Department of Cardiology, All India Institute of Medical Sciences, New Delhi, India

Click here for correspondence address and email

Date of Submission05-Aug-2022
Date of Decision07-Aug-2022
Date of Acceptance10-Aug-2022
Date of Web Publication19-Aug-2022
 

How to cite this article:
Arvind B, Ramakrishnan S. Pediatric interventional cardiology: Breaking new grounds. Ann Pediatr Card 2022;15:109-13

How to cite this URL:
Arvind B, Ramakrishnan S. Pediatric interventional cardiology: Breaking new grounds. Ann Pediatr Card [serial online] 2022 [cited 2022 Oct 1];15:109-13. Available from: https://www.annalspc.com/text.asp?2022/15/2/109/354063




The management of congenital heart disease (CHD) has changed considerably in the recent years. On one side, there has been increased emphasis on earlier corrective surgeries and on palliative or radical repairs of conditions that were previously considered inoperable, whereas, on the other, there have been tremendous advancements in interventional transcatheter techniques, mainly attributable to the advancements in hardware and imaging techniques.

Pediatric interventional cardiology is a unique medical discipline in that the operator requires the knowledge base of pediatrics and cardiology coupled with the physical skills and attributes as that of surgical disciplines. The scope of practice of interventional cardiology is no longer limited to valvuloplasties and closure of simple cardiac defects but has expanded to include complex intracardiac, vascular, and valve interventions. The magnitude and complexity of these tasks have grown substantially so that not many interventionalists can master all of them. While the advancements in the field of interventional pediatric cardiology are taking giant strides in the west, in India there has been a slow, yet steady progress. The reasons are a multitude for the lag in acceptance of these recent technologic advancements, most important being the financial and regulatory restrictions. However, there had been a few indigenous and innovative contributions from some of the developing countries, especially India.[1]

This issue of Annals focuses exclusively on therapeutic catheterization procedures performed in children and adults with congenital cardiovascular diseases. Undoubtedly, this issue will be a delightful read, full of innovations, out-of-the-box thinking, and executions.


   New Kids on the Block Top


Every novel drug or therapeutic agent follows a typical natural history, right from it's introduction till the time it's utility is confirmed by good quality data. It might be intriguing to notice that even transcatheter interventions for CHD follow a similar course. In [Figure 1] we have attempted to categorize some of the recently described cardiac interventions along various phases of this natural history curve. Of late, the most discussed topics in the global pediatric cardiac internationalists fora are transcatheter pulmonary valves and transcatheter correction of superior sinus venosus defects. This journal issue has provided ample food for thought for readers interested in these upcoming techniques.
Figure 1: Natural history of congenital cardiac intervention in comparison with that of any novel drug or therapeutic agent. VSD: Ventricular septal defects, RVOT: Right ventricular outflow tracts, ASDs: Atrial septal defects, PDA: Patent ductus arteriosus, SV-ASD: Sinus venosus - Atrial septal defects, TPVI: Transcatheter pulmonary valve implantation

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Transcatheter pulmonary valve implantation (TPVI) is gaining a wide attention among most pediatric cardiologists practicing in India. TPVI in native right ventricular outflow tract (RVOT) poses unique challenges compared to TPVI in RVOT reconstructed with conduits or bioprosthetic valves. Last year, we published the early results of TPVI with Venous P-valves, MyVal, and Melody valve systems, which were encouraging.[2],[3],[4] In the current issue, Sivaprakasam et al. and Sivakumar et al. allude to the challenges of TPVI in dilated and dysfunctional RVOT and the strategies that were adopted to overcome them.[5],[6] With newer valves coming up in the market and improved understanding of the native RVOT anatomy, increasing number of patients are being identified to be suitable for a TPVI. With an ever-growing population of adolescents and adults with repaired tetralogy in our country, there is immense scope for this technique to expand widely in the coming decade. However, prohibitive cost remains the major challenge.[7] Investing research interests in this area with a focus to design and manufacture indigenous valves will certainly prove fruitful for a very large subpopulation of repaired tetralogy of Fallot patients.

While strategies for TPVI are expanding at one end, on the other, few pediatric interventionalists have demonstrated out-of-the-box thinking by implanting these valves in nonpulmonary positions. Duarte et al. and Torre et al. have published their experience of Melody valves in tricuspid and mitral positions, respectively, in two children.[8],[9] Although the longevity of such procedures remains unknown, it is worthy to be aware of the feasibility of such innovative options.

In the “How I Do It” section, the procedures for transcatheter correction of superior sinus venosus defects have been covered.[10] This article highlights the most basic points required to understand the nuances of this upcoming technique. Sivakumar K has consolidated all his experience and has come up with this protocol which might be applicable to resource-limited settings such as ours where there is limited access to three-dimensional printed models and advanced imaging tools such as virtual reality or holography.


   Innovations in Atrial Septal Defects Closure Top


Transcatheter device closure programs for atrial septal defects (ASD) have been well established. Substantial contributions have been made by Indian interventionalists with regard to transcatheter ASD closure.[1] Nevertheless, ongoing innovations continue to be reported by which, defects that are otherwise considered for surgical closure are being made amenable for transcatheter closure. Few such innovations include the use of multiple devices for closing multiple ASDs or closure of ASDs in carefully selected patients with anomalous retroaortic left circumflex artery or resorting to transhepatic access in children with interrupted inferior vena cava[11],[12],[13] or cribriform septal occluder for fenestrated defects.[14] In this issue, Sagar et al. describe the utility of balloon interrogation, and discuss the pros and cons of simultaneous versus sequential delivery of multiple devices in the setting of multiple ASDs.[11] Successful device closure of ASDs in children weighing lesser than 10 kilograms have been reported from some Indian centres.[15] However, there are certain limitations to such innovations and the procedures are best restricted to experienced centers with a good cardiac surgical backup.

In another report, Pizzuto et al. report the utility of the new GORE® Cardioform occluder device as a rescue option in a patient who developed atrioventricular block following ASD closure with an Amplatzer Septal Occluder.[16] It is claimed that this device could close large defects at low mechanical stress on surrounding structures, thereby resulting in a lesser incidence of conduction disturbances.


   Nonconventional Uses of Occlusion Devices Top


Off-label use of various occluder devices for closing restrictive perimembranous ventricular septal defects (VSD) is frequently done in India. Even selected indirect Gerbode defects and subpulmonary VSDs have been successfully closed percutaneously.[17],[18] However, it should be borne in mind that failed attempts, suboptimal results and complications are seldom reported in the literature. Case selection remains paramount for successful outcomes, especially in India where regulations are relatively lenient for off-label indications. Vascular plugs are versatile devices that are ideally suited to close extracardiac vascular communications and their use is expanding in pediatric interventions.[19],[20],[21] With increasing number of palliated single-ventricle patients surviving beyond adolescence, interventions on the Fontan circuit including fenestration closures are being increasingly done. These patients need to be better analyzed with defined criteria before undergoing closure of fenestration.[22] Furthermore, partial occlusion of the Fontan fenestration has also been reported with the use of a flow regulator device.[23]


   Utility of Stents Top


The utility of stents in palliating or correcting children with CHDs is expanding. Stenting of RVOT and ductus arteriosus is being increasingly performed in addition to the established procedures of stenting the aortic coarctation and stenosed pulmonary arteries. Ductal stenting in small neonates with ductus-dependent systemic circulation as a part of a staged treatment has been published in this issue by Anagnostopoulou et al. and Weryński et al.[24],[25] Vertical vein stenting as a bailout procedure in selected neonates with obstructed total anomalous pulmonary venous drainage and a prohibitively high surgical risk has been previously reported.[26] In this issue, Lale et al. have reported their experience of successfully managing two cases with blocked modified Blalock–Taussig shunt by stenting.[27]

Arora et al.[28] report that newer noncompliant coronary balloons may emerge as excellent alternatives in neonatal coarctation, an intervention that still remains unconquered among neonatal interventions. Research using bioresorbable material for stents and devices is ongoing and the ideal material remains elusive. Mood et al. from Malaysia report their experience of iron bioresorbable stents in providing temporary palliation in neonates with reduced pulmonary blood flow conditions with a noncomplex patent ductus arteriosus (PDA) morphology.[29] This group observed accelerated neointimal proliferation in these bioresorbable stents and hence recommends their usage in neonates with an alternative source of pulmonary blood flow. These novel scaffolds mandate further research and it might be premature to take decisions based on the available data.


   Advances in Vascular Access and Imaging Top


Advances in imaging and vascular access are the primary drivers of much of the expansion of pediatric interventional procedures. Excellent articles alluding to the techniques of axillary and carotid access for performing pediatric cardiac interventions have been published in the Annals.[30],[31],[32] Interventional echocardiography in the form of 3D echocardiography and intracardiac echocardiography has revolutionized peri-procedural imaging guidance. Recent additions like rotational angiography and fusion imaging further aid in selected complex structural interventions.[33]

Other emerging interventions including the use of atrial flow regulator in children, reduction devices for RVOT, percutaneous Potts shunt, and preterm PDA closure will be featuring in our subsequent issues.


   Multicenter Registries for Interventional Procedures: The Way Forward? Top


The limited numbers of patients with any given congenital cardiac anomaly, and the heterogeneous subpopulations, makes pediatric cardiology a challenging area to obtain valid and generalizable data. For established interventional procedures, continuous critical evaluation of mid and long-term outcomes is essential. Whereas for newer and upcoming techniques, the primary consideration should be how they compare with surgery in terms of clinical utility, morbidity, and mortality. For instance, there are cases of congenital systemic arterial fistulas and aorta to the right ventricular tunnels that have been managed using transcatheter techniques with good immediate and short-term results.[34],[35] However, the medium and long-term outcomes are not known. Unless these patients are placed on rigorous follow-up, such outcome data will always remain unknown. Importantly, making management decisions based on small, single-center reports of a handful of cases may not be ideal. This problem can be partially circumvented by looking at cumulative multicenter data. Such an attempt has been done in the article by Koneti et al., where they report an experience of congenital portosystemic shunts from five Indian centers.[36] However, there may be significant heterogeneity in practices between various centers, in addition to the bias inherent to retrospective review of records. Thus, this subspecialty is one in which prospective high-quality registry data would be particularly suitable. Similar registry databases are functional in the Western world, which have majorly contributed to the outcome data of various cardiac procedures. It is high time that the pediatric cardiology community in India come forward to establish such registries and generate data that are relevant to the indigenous population.

Till such data are available, from an interventionalists' perspective, although it is good to think “Can this problem be fixed percutaneously and an invasive surgery be avoided?,” it is wiser to think “Will the cardiac surgeon with a loupe be able to fix it better than an interventional cardiologist with fluoroscope?.”



 
   References Top

1.
Ramakrishnan S. Pediatric cardiology: Is India self-reliant? Ann Pediatr Cardiol 2021;14:253-9.  Back to cited text no. 1
    
2.
Sivakumar K, Sagar P, Qureshi S, Promphan W, Sasidharan B, Awasthy N, et al. Outcomes of Venus P-valve for dysfunctional right ventricular outflow tracts from Indian Venus P-valve database. Ann Pediatr Cardiol 2021;14:281-92.  Back to cited text no. 2
    
3.
Sivaprakasam MC, Reddy JRV, Gunasekaran S, Sivakumar K, Pavithran S, Rohitraj GR, et al. Early multicenter experience of a new balloon expandable MyVal transcatheter heart valve in dysfunctional stenosed right ventricular outflow tract conduits. Ann Pediatr Cardiol 2021;14:293-301.  Back to cited text no. 3
    
4.
Sheth K, Azad S, Dalvi B, Parekh M, Sagar P, Anantharaman R, et al. Early multicenter experience of Melody valve implantation in India. Ann Pediatr Cardiol 2021;14:302-9.  Back to cited text no. 4
    
5.
Sivaprakasam MC, Reddy JR, Ganesan R, Sridhar A, Solomon N, Moosa MJ, et al. Choosing an appropriate size valve for transcatheter pulmonary valve implantation in a native right ventricle outflow tract. Ann Pediatr Card 2022;15:154-59.  Back to cited text no. 5
  [Full text]  
6.
Sivakumar K, Chandrasekaran R, Hijazi ZM. Unique challenges posed by a dysfunctional native right ventricular outflow tract for percutaneous pulmonary valve implantation using SAPIEN-S3 valve. Ann Pediatr Card 2022;15:175-79.  Back to cited text no. 6
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7.
Kothari SS. Percutaneous pulmonary valve implantation in India: Quo Vadis? Ann Pediatr Cardiol 2021;14:310-4.  Back to cited text no. 7
    
8.
Duarte D, Prieto LR, Suntharos P. Melody valve-in-valve implantation in the tricuspid position through a Fontan conduit fenestration. Ann Pediatr Card 2022;15:180-82.  Back to cited text no. 8
  [Full text]  
9.
Torre LA, Vázquez BT, Linde DH, Soto AM, Torres EG. Percutaneous transhepatic and transseptal valvuloplasty of a Melody® valved stent in mitral position in a 2-year-old child. Ann Pediatr Card 2022;15:183-86.  Back to cited text no. 9
    
10.
Sivakumar K. How to do it? Transcatheter correction of superior sinus venosus defects. Ann Pediatr Card 2022;15:169-74.  Back to cited text no. 10
  [Full text]  
11.
Sagar P, Sivakumar K, Chandrasekaran R, Pavithran S, Thejaswi P, Monica R. Transcatheter closure of multiple secundum atrial septal defects using multiple devices: A comparative experience between pediatric and adult patients. Ann Pediatr Card 2022;15:128-37.  Back to cited text no. 11
  [Full text]  
12.
Mumtaz ZA, Sivakumar K. Evaluation of patients for potential compression of anomalous coronaries coursing behind the aortic root before device closure of secundum atrial septal defects. Ann Pediatr Card 2022;15:195-98.  Back to cited text no. 12
  [Full text]  
13.
Dhulipudi B, Bhakru S, Singh JR, Koneti NR. Transhepatic device closure of atrial septal defect in children associated with interrupted inferior vena cava. Ann Pediatr Card 2022;15:160-63.  Back to cited text no. 13
  [Full text]  
14.
Pradhan P, Jain S, Sen S, Dalvi B. Use of cribriform amplatzer septal occluder in the pediatric population: Feasibility, safety, and technical considerations. Ann Pediatr Cardiol 2021;14:159-64.  Back to cited text no. 14
    
15.
Sharma B, Pinto R, Dalvi B. Transcatheter closure of atrial septal defect in symptomatic children weighing ≤10 kg: Addressing unanswered issues from a decade of experience. Ann Pediatr Card 2020;13:4-10.  Back to cited text no. 15
[PUBMED]  [Full text]  
16.
Pizzuto A, Cuman M, Cantinotti M, Franchi E, Corana G, Viacava C, et al. Rescue atrial septal defect closure with the new GORE® cardioform atrial septal defect occluder. Ann Pediatr Card 2022;15:192-94.  Back to cited text no. 16
  [Full text]  
17.
Parvez MA, Das D. Transcatheter device closure of perimembranous ventricular septal defect associated with indirect Gerbode defect: A retrospective study. Ann Pediatr Cardiol 2021;14:397-400.  Back to cited text no. 17
    
18.
Barwad P, Prasad K, Dinakar B, Bhargav A, Santosh K, Naganur S. Percutaneous closure of small subpulmonic ventricular septal defect with an ADO I PDA occluder in a child. Ann Pediatr Cardiol 2020;13:349-52.  Back to cited text no. 18
    
19.
Barwad P, Ramakrishnan S, Kothari SS, Saxena A, Gupta SK, Juneja R, et al. Amplatzer vascular plugs in congenital cardiovascular malformations. Ann Pediatr Cardiol 2013;6:132-40.  Back to cited text no. 19
    
20.
Mazza GA, Garofalo M, Agnoletti G. Percutaneous treatment of anomalous systemic artery to pulmonary venous fistulas in children: Description of three cases and review of the literature. Ann Pediatr Cardiol 2021;14:536-40.  Back to cited text no. 20
    
21.
Nair A, Sheth K, Sheth R, Dalvi B. Transcatheter treatment of an unusual coronary arteriovenous malformation with a fistulous sac in the interventricular septum. Ann Pediatr Cardiol 2021;14:91-4.  Back to cited text no. 21
    
22.
Thatte N, Dimas V, Nugent A, Zellers T, Forbess J, Zabala L, et al. Use of institutional criteria for transcatheter device closure of Fontan fenestration - Midterm outcomes. Ann Pediatr Cardiol 2020;13:327-33.  Back to cited text no. 22
    
23.
Sonawane BS, Sivakumar K. Transcatheter reduction in size of large undesirable fenestrations following extracardiac conduit Fontan surgery with off-label use of Occlutech atrial flow regulator. Ann Pediatr Cardiol 2020;13:260-3.  Back to cited text no. 23
    
24.
Anagnostopoulou AS, Karanasios ES, Eleftherakis NG. Duct stenting in an ELBW infant with aortic arch interruption. Ann Pediatr Card 2022;15:203-05.  Back to cited text no. 24
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25.
Weryński P, Malinowska-Weryńska A, Wojcik A, Kołcz J. Staged treatment of a premature newborn with interrupted aortic arch and aorta-pulmonary window using intraoperative hybrid procedure before subsequent total correction – Long-term follow-up. Ann Pediatr Card 2022;15:216-18.  Back to cited text no. 25
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26.
Kumar G, Chimoriya R, Awasthy N, Dagar KS. Vertical vein stenting as a therapeutic strategy for obstructed supracardiac total anomalous pulmonary venous connection. Ann Pediatr Cardiol 2020;13:379-81.  Back to cited text no. 26
    
27.
Lale P, Aggarwal N, Agarwal M, Joshi RK, Joshi R, Vivek BS. Endovascular stent implantation as a primary method of treatment for blocked modified Blalock-Taussig shunt. Ann Pediatr Card 2022;15:209-11.  Back to cited text no. 27
  [Full text]  
28.
Arora HS, Vidya PL, Ghosh AK, Mishra SC, Shouche S, Sethi BS, et al. Midterm safety and outcome of balloon angioplasty of native aortic coarctation in neonates and young infants and initial experience of prepartial dilatation using high-pressure noncompliant balloon. Ann Pediatr Card 2022;15:121-27.  Back to cited text no. 28
  [Full text]  
29.
Mood MC, Niazy KA, Alwi M, Samion H, Tiong KG, Sivalingam S, et al. Feasibility, safety, and efficacy of iron bioresorbable scaffold in neonates with duct-dependent pulmonary circulation. Ann Pediatr Card 2022;15:147-53.  Back to cited text no. 29
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30.
Polat TB. Use of percutaneous carotid artery access for performing pediatric cardiac interventions: Single-center study. Ann Pediatr Cardiol 2020;13:16-24.  Back to cited text no. 30
    
31.
Meliota G, Lombardi M, Zaza P, Tagliente MR, Vairo U. Balloon angioplasty of aortic coarctation in critically ill newborns using axillary artery access. Ann Pediatr Cardiol 2020;13:67-71.  Back to cited text no. 31
    
32.
Qureshi SA, Kumar RK. Vascular access in pediatric interventions: Science or skill? Ann Pediatr Cardiol 2020;13:1-3.  Back to cited text no. 32
    
33.
Sivakumar K, Mumtaz ZA, Sagar P. Application of Vessel Navigator™ fusion imaging software in a complex transcatheter palliation of Tetralogy of Fallot with pulmonary atresia. Ann Pediatr Card 2022;15:187-91.  Back to cited text no. 33
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34.
Subramanian AP, Jayranganath M, Bharath AP, Barthur A, Sastry UM, Moorman AF. Congenital systemic arteriovenous fistulas: Interventional strategies and embryological perspectives. Ann Pediatr Card 2022;15:138-46.  Back to cited text no. 34
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35.
Kalyanasundaram M, Kasha A, Gopalakrishnan S, Jothinath K. Transcatheter management of aorto-right ventricular tunnel: A surprise in the catheterization laboratory. Ann Pediatr Card 2022;15:199-202.  Back to cited text no. 35
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36.
Koneti NR, Bakhru S, Jayranganath M, Kappanayil M, Bobhate P, Srinivas L, et al. Transcatheter closure of congenital portosystemic shunts – A multicenter experience. Ann Pediatr Card 2022;15:114-20.  Back to cited text no. 36
  [Full text]  

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Correspondence Address:
Prof. Sivasubramanian Ramakrishnan
Department of Cardiology, All India Institute of Medical Sciences, New Delhi
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/apc.apc_91_22

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