Congenital EP Featured Articles of April 2017


Pediatric Cardiac and EP Reviews of April 2017 Manuscripts


Pacemaker and Defibrillator Implantation in Patients with Transposition of the Great Arteries

Grubb AF, Shah G, Aziz PF, Krasuski RA

The Journal of Innovations in Cardiac Rhythm Management, 8 (2017), 2658-2664


Take Home Points:


  • Cardiac implantable device implantation in TGA substrates presents unique challenges both at implant and throughout follow-up.
  • This study does not apply to arterial switch patients.
  • Despite differences in indications for implantable devices and age at device implant between d- and l-TGA patients, both TGA groups unfortunately appear to have similar progressions in the development of heart failure with its associated morbidity and mortality.
  • Utilization of current published guidelines for primary prevention ICD implantation has shortcomings when applied to TGA substrates and would benefit from updated evidence and experience with ICDs in TGA patients to guide and individualize this treatment option in this unique patient population.


chang-philip-1780821827Commentary from Dr. Philip Chang (Los Angeles), section editor of Congenital Heart Surgery Journal Watch: Article summary:

Grubb et al presented a retrospective review of their single-center experience with cardiac implantable electronic devices (CIEDs) in d- and l-TGA patients with systemic RVs.  The study looked at all TGA patients with CIEDs cared for at their institution over an 18-year period.  All patients had systemic right ventricles and all patients had undergone biventricular repair approaches, with single-ventricle variants and those with repairs to restore systemic morphologic left ventricular circulation excluded from analysis.  In total, 63 patients were identified (34 d-TGA, 29 l-TGA).  The authors performed detailed chart review for each subject to determine initial device implant timing/age, development of heart failure, and variables associated with ICD follow-up including defibrillation thresholds and shocks.








Study limitations include single-center inclusivity and retrospective design.  The authors did not provide more in-depth detail pertaining to implant approaches, CIED pocket site (left vs. right chest for transvenous devices, which could have implications in ICD defibrillation function), or CIED-related complications.   Several patients reportedly had CRT devices, but no detail was provided in terms of the indications for CRT or implant approach.


Reviewer perspective and thoughts for pediatric/CHD EP:

While it is commonly recognized and even expected that TGA patients will require CIED implantation, primarily for pacing indications, it has been quite some time since the topic of CIED utilization and benefit in TGA patients has been studied.  As such, the authors are commended for reviewing their data and presenting their experience, which is quite valuable for our community.  The study definitely highlights the importance of considering multi-institutional pooling of data and experience.  Furthermore, while the growth of the atrial switched d-TGA population is diminishing, there is still a considerable population of these patients, along with a growing number of adult l-TGA patients that should motivate greater awareness of the use of CIEDs in these very unique ACHD subgroups.

There is little debate in the indications for and benefits of pacing in TGA substrates and the authors’ findings of more predominant pacing for sinus node disease in d-TGA and AV block in l-TGA isn’t novel.  It remains unclear as to the role of CRT for wide QRS, heart block, or dyssynchrony in TGA, and more specifically its feasibility and effectiveness in primary systemic RV resynchronization.  With the advent of and interest in His-bundle pacing, the feasibility of this method of pacing in d- vs. l-TGA would be interesting to explore in terms of technical considerations and long-term benefit.  The finding that no primary prevention ICD patients received appropriate shocks was interesting, but not entirely surprising.  This certainly raises the question of the appropriateness of applying standard guidelines for ICD implantation to the TGA population and while some published data exists for risk stratification in d-TGA, greater evidence is needed to guide ICD therapy, particularly for primary prevention indications, in these patients.   Finally, with the subcutaneous ICD as a contemporary implant option, it will also be interesting to see how the balance between implant indication and “ease” of device implant will change.


It is sobering to see that both d- and l-TGA patients with systemic RVs progress in very similar fashions to develop heart failure and its associated clinical sequelae and mortality.  This shared finding between d- and l-TGA patients highlights the unique and highly complex substrate in which CIEDs are being applied, as well as the multifactorial process involved in the near-universal fate of the systemic RV in these TGA patients.




Lone Pediatric Atrial Fibrillation in the United States: Analysis of Over 1500 Cases

El-Assaad I, Al-Kindi SG, Saarel EV, Aziz PF

Pediatr Cardiol April 2017 (DOI: 10.1007/s00246-017-1608-7)


Take home points:

  • Lone atrial fibrillation is a rare arrhythmia condition among pediatric patients.
  • Increasing age and obesity appear associated with higher incidence of lone atrial fibrillation though evidence indicating direct causality is lacking.
  • While complications such as thromboembolic events are rare in pediatric lone atrial fibrillation, their incidence is not ignorable. However, treatment recommendations and practice patterns are inconsistent.


Commentary from Dr. Philip Chang (Los Angeles, CA) section editor of Congenital Heart Surgery Journal WatchThere has been much recent interest in atrial fibrillation in pediatric and young adult patients, particularly as it pertains to risk factors for its development as well as treatment in patients with significant or symptomatic recurrences and in the setting of CHD.  Despite this interest, studies with large sample sizes are lacking in order to better understand its incidence, clinical sequelae, treatment options and response, and long-term outcomes, particularly in otherwise healthy individuals.  The current study from El-Assaad et al provides a descriptive analysis of the largest cohort of young patients with lone atrial fibrillation in the United States.

The authors sought to evaluate risk factors and short-term outcomes of pediatric lone atrial fibrillation, simply defined as atrial fibrillation occurring in the absence of cardiac and systemic diseases.  They utilized a privately managed national healthcare database, Explorys, from which they were able to query and determine an incidence of pediatric lone atrial fibrillation, other variables that may be associated with its diagnosis, and clinical sequelae over a 17-year period (1999-2016).  The database was created from de-identified data provided by 360 hospitals in all 50 US states and over 300,000 providers.

Results of querying the Explorys database yielded nearly 8 million children, with 1910 children linked to an atrial fibrillation diagnosis.  Of these patients, 1750 children met the definition of lone atrial fibrillation.  This resulted in a calculated pediatric lone AF incidence of 7.5 in 100,000 persons at risk.  Nearly 10% of these patients also had concomitant diagnosis of SVT but further characterization of this could not be determined from the dataset variables.  The authors found relatively low percentages of antiarrhythmic use (5%), aspirin or warfarin for anticoagulation (7% and 5%, respectively), and electrical cardioversion (3%).  Older patients tended to be prescribed aspirin or warfarin more frequently compared to younger aged cohorts.


Multivariate analysis showed increasing age, male gender, and obesity to be associated with risk of lone AF.  Increasing age was also associated with increased risk of AF recurrence within 1 month of initial episode.  Interestingly, among patients 15-19 years of age, nearly 20% experienced AF recurrence.  The authors also found that 2% of patients experienced a stroke within 1 year of lone AF diagnosis.  Following exclusion of other concomitant diagnoses including sepsis, hypertension, hypertensive crisis, drug abuse, stimulant use, cancer, renal impairment, sleep apena, respiratory failure, and bone marrow transplant, a total of 1580 patient remained.  Among these patients, a male predominance was noted (61%), and most episodes of lone AF occurred in the 15-19 years age group (58%).  Those in the oldest age cohort had recurrence rates spanning 15-22% from 1 month up to 1 year after the initial event.  In this lone AF subset, 1% of patients had a stroke within 1 year of lone AF diagnosis.



Study limitations include limited available variables in the database and inability to control for the quality and accuracy of the data provided.  For example, the authors noted that they were unable to review ECGs to confirm AF diagnosis or echocardiograms to evaluate chamber size and that some patients could have been misclassified as having AF in the first place.  Recurrence rates could have been overestimated if a single AF diagnosis reappeared on more than 1 occasion.  They also noted that the dataset itself has not been directly validated for pediatric studies, though adult studies have demonstrated its validity.  It is unclear as to why nearly 10% of the originally classified “lone AF” patients were excluded given other systemic diseases to come to the subgroup of 1580 patients that were further analyzed for lone AF incidence and recurrence.  By the authors’ definition, these patients would not have met a pure lone AF diagnosis given these concomitant conditions, many of which can certainly increase the risk of arrhythmias (AF being one of them).  If the subgroup patients were used to calculate incidence, the lone AF incidence would be even lower.  Finally, the authors did not have further details relating to concomitant SVT in the 10% of patients identified and there was no long-term data regarding treatment efficacy (antiarrhythmics or catheter ablation), prognosis, and outcomes.


Reviewer perspective and thoughts for pediatric/CHD EP:

This study is an excellent example of the use of large scale databases to evaluate otherwise rare conditions.  As such, it provides a faster, and perhaps more accurate, assessment of pediatric lone AF incidence, as well as general approaches to management, complications, and recurrence.  The study is obviously limited by the quality and accuracy of data entered into the database itself.

This study’s finding of the association between lone AF and obesity, male gender, and increasing age is helpful and consistent with previous publications noting these potential associations that had substantially smaller patient cohorts.  The association with obesity is likely multifactorial.  Obesity is frequently associated with other cardiovascular conditions including hypertension, diastolic dysfunction, and left atrial distension and pressure loading, though interestingly, the association between obesity and lone AF was apparently made in the study after excluding for these other systemic diseases.  It is possible that these other systemic diseases were under-reported in the dataset and echo data was not available to assess for evidence of diastolic dysfunction or left atrial abnormalities.  Obesity is also frequently associated with obstructive sleep apnea, which is increasingly recognized as having a strong association with arrhythmia risk including AF (though again, the study largely excluded patients with concomitant diagnoses of AF and sleep apnea).  The authors noted familial lone AF as a possible important contributor, and the genetics of AF remains an important area of ongoing research.

Several important findings from this study that are important for the pediatric EP community to be aware of is the low incidence of pediatric lone AF that is found and which is likely more reflective of its true incidence in the general pediatric population.  Furthermore, based on the study’s results, there appears to be a fairly high recurrence rate (up to 20% in the oldest age cohort) as well as a low but very concerning incidence of stroke.  Both of these appeared to be present in the setting of low utilization of antiarrhythmic agents and anticoagulation.  In fact, the stroke incidence that was noted in this study corresponded to an equivalent CHADS2VASc score that would qualify patients to receive anticoagulation with either warfarin or NOACs.  This study’s findings show that pediatric lone AF may not be as benign of a condition as some may think and that these patients require aggressive and close follow-up to address or prevent recurrences and to reduce AF-related complications.

CHD EP April 2017


  1. Atrial undersensing secondary to quiet timer blanking in pediatric and congenital heart disease patients.

von Alvensleben JC, Schaffer M, Brateng C, Collins KK.

Pacing Clin Electrophysiol. 2017 Apr 24. doi: 10.1111/pace.13101. [Epub ahead of print]

PMID: 28436549

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  1. Percutaneous Ventricular Assist Device for Circulatory Support During Ablation of Atrial Tachycardias in Patients With Fontan Circulation.

Hendriks A, De Vries L, Witsenburg M, Yap SC, Van Mieghem N, Szili-Torok T.

Rev Esp Cardiol (Engl Ed). 2017 Apr 18. pii: S1885-5857(17)30170-6. doi: 10.1016/j.rec.2017.03.010. [Epub ahead of print] English, Spanish. No abstract available.

PMID: 28431884

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  1. The electrical heart axis and ST events in fetal monitoring: A post-hoc analysis following a multicentre randomised controlled trial.

Vullings R, Verdurmen KMJ, Hulsenboom ADJ, Scheffer S, de Lau H, Kwee A, Wijn PFF, Amer-Wåhlin I, van Laar JOEH, Oei SG.

PLoS One. 2017 Apr 14;12(4):e0175823. doi: 10.1371/journal.pone.0175823. eCollection 2017.

PMID: 28410419 Free PMC Article

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  1. Sudden cardiac death in adults with congenital heart disease: does QRS-complex fragmentation discriminate in structurally abnormal hearts?

Vehmeijer JT, Koyak Z, Bokma JP, Budts W, Harris L, Mulder BJ, de Groot JR.

Europace. 2017 Apr 10. doi: 10.1093/europace/eux044. [Epub ahead of print]

PMID: 28402450

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  1. Post mortem therapy from a subcutaneous ICD: What is the mechanism?

Wiles BM, Fitzsimmons SJ, Roberts PR.

Pacing Clin Electrophysiol. 2017 Apr 4. doi: 10.1111/pace.13089. [Epub ahead of print] No abstract available.

PMID: 28374449

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  1. Lone Pediatric Atrial Fibrillation in the United States: Analysis of Over 1500 Cases.

El-Assaad I, Al-Kindi SG, Saarel EV, Aziz PF.

Pediatr Cardiol. 2017 Apr 3. doi: 10.1007/s00246-017-1608-7. [Epub ahead of print]

PMID: 28374048

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  1. [Clinical features and outcomes of radiofrequency catheter ablation of atrial flutter in children].

Jiang H, Li XM, Zhang Y, Liu HJ, Li MT, Ge HY.

Zhonghua Er Ke Za Zhi. 2017 Apr 2;55(4):267-271. doi: 10.3760/cma.j.issn.0578-1310.2017.04.007. Chinese.

PMID: 28441822

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  1. [Brief interpretation of “the Pediatric and Congenital Electrophysiology Society (PACES)and the Heart Rhythm Society (HRS) expert consensus statement on the use of catheter ablation in children and patients with congenital heart disease].

Wu JJ, Li F.

Zhonghua Er Ke Za Zhi. 2017 Apr 2;55(4):256-259. doi: 10.3760/cma.j.issn.0578-1310.2017.04.004. Chinese. No abstract available.

PMID: 28441820

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  1. Non-fluoroscopic cardiac ablation of neonates with CHD.

Bigelow AM, Arnold BS, Padrutt GC, Clark JM.

Cardiol Young. 2017 Apr;27(3):592-596. doi: 10.1017/S1047951116001554. Epub 2016 Oct 21.

PMID: 27766996

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  1. What Is the Best Age for Diagnostic Prediction of Pediatric Long-QT Syndrome With a Borderline QT Interval?

Miyazaki A, Doi H.

Circ Arrhythm Electrophysiol. 2017 Apr;10(4). pii: e005119. doi: 10.1161/CIRCEP.117.005119. No abstract available.

PMID: 28356308

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  1. Left ventricular dysfunction is associated with frequent premature ventricular complexes and asymptomatic ventricular tachycardia in children.

Bertels RA, Harteveld LM, Filippini LH, Clur SA, Blom NA.

Europace. 2017 Apr 1;19(4):617-621. doi: 10.1093/europace/euw075.

PMID: 28431063

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  1. Outcomes of lead extraction in young adults.

El-Chami MF, Sayegh MN, Patel A, El-Khalil J, Desai Y, Leon AR, Merchant FM.

Heart Rhythm. 2017 Apr;14(4):537-540. doi: 10.1016/j.hrthm.2017.01.030. Epub 2017 Feb 16.

PMID: 28189822

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  1. Avoiding sports-related sudden cardiac death in children with congenital channelopathy : Recommendations for sports activities.

Lang CN, Steinfurt J, Odening KE.

Herz. 2017 Apr;42(2):162-170. doi: 10.1007/s00059-017-4549-2.

PMID: 28233036

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  1. Corrigendum to ‘Ventricular tachyarrhythmia during pregnancy in women with heart disease: Data from the ROPAC, a registry from the European Society of Cardiology’ [Int. J. Cardiol. 220 (2016) 131-136].

Ertekin E, van Hagen IM, Salam AM, Ruys TP, Johnson MR, Popelova J, Parsonage WA, Ashour Z, Shotan A, Oliver JM, Veldtman GR, Hall R, Roos-Hesselink JW.

Int J Cardiol. 2017 Apr 1;232:348. doi: 10.1016/j.ijcard.2017.01.077. Epub 2017 Jan 27. No abstract available.

PMID: 28139301 Free Article

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  1. Utility and safety of the SafeSept™ transseptal guidewire for electrophysiology studies with catheter ablation in pediatric and congenital heart disease.

Knadler JJ, Anderson JB, Chaouki AS, Czosek RJ, Connor C, Knilans TK, Spar DS.

J Interv Card Electrophysiol. 2017 Apr;48(3):369-374. doi: 10.1007/s10840-017-0224-z. Epub 2017 Jan 14.

PMID: 28091832

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  1. Evaluation of Prolonged QT Interval: Structural Heart Disease Mimicking Long QT Syndrome.

Weissler-Snir A, Gollob MH, Chauhan V, Care M, Spears DA.

Pacing Clin Electrophysiol. 2017 Apr;40(4):417-424. doi: 10.1111/pace.13040. Epub 2017 Mar 16.

PMID: 28155223

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  1. Arrhythmias in Adults with Congenital Heart Disease: What Are Risk Factors for Specific Arrhythmias?

Loomba RS, Buelow MW, Aggarwal S, Arora RR, Kovach J, Ginde S.

Pacing Clin Electrophysiol. 2017 Apr;40(4):353-361. doi: 10.1111/pace.12983. Epub 2017 Feb 27.

PMID: 27987225

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  1. Clinical Application of the QRS-T Angle for the Prediction of Ventricular Arrhythmias in Patients with the Fontan Palliation.

Tran TV, Cortez D.

Pediatr Cardiol. 2017 Apr 29. doi: 10.1007/s00246-017-1618-5. [Epub ahead of print]

PMID: 28456831

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  1. Fetal cardiac time intervals in healthy pregnancies – an observational study by fetal ECG (Monica Healthcare System).

Wacker-Gussmann A, Plankl C, Sewald M, Schneider KM, Oberhoffer R, Lobmaier SM.

J Perinat Med. 2017 Apr 28. pii: /j/jpme.ahead-of-print/jpm-2017-0003/jpm-2017-0003.xml. doi: 10.1515/jpm-2017-0003. [Epub ahead of print]

PMID: 28453441

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  1. Electrophysiological effects of anthracyclines in adult survivors of pediatric malignancy.

Markman TM, Ruble K, Loeb D, Chen A, Zhang Y, Beasley GS, Thompson WR, Nazarian S.

Pediatr Blood Cancer. 2017 Apr 28. doi: 10.1002/pbc.26556. [Epub ahead of print]

PMID: 28453898

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  1. Prospective Study of Adenosine on Atrioventricular Nodal Conduction in Pediatric and Young Adult Patients After Heart Transplant.

Flyer JN, Zuckerman WA, Richmond ME, Anderson BR, Mendelsberg TG, McAllister JM, Liberman L, Addonizio LJ, Silver ES.

Circulation. 2017 Apr 27. pii: CIRCULATIONAHA.117.028087. doi: 10.1161/CIRCULATIONAHA.117.028087. [Epub ahead of print]

PMID: 28450351

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  1. Mid-Term Follow-up of School-Aged Children With Borderline Long QT Interval.

Miyazaki A, Sakaguchi H, Matsumura Y, Hayama Y, Noritake K, Negishi J, Tsuda E, Miyamoto Y, Aiba T, Shimizu W, Kusano K, Shiraishi I, Ohuchi H.

Circ J. 2017 Apr 25;81(5):726-732. doi: 10.1253/circj.CJ-16-0991. Epub 2017 Feb 18.

PMID: 28216547 Free Article

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  1. Transesophageal and invasive electrophysiologic evaluation in children with Wolff-Parkinson-White pattern.

Koca S, Pac FA, Kavurt AV, Cay S, Mihcioglu A, Aras D, Topaloglu S.

Pacing Clin Electrophysiol. 2017 Apr 24. doi: 10.1111/pace.13100. [Epub ahead of print]

PMID: 28436586

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  1. The role of echocardiography in fetal tachyarrhythmia diagnosis. A burden for the pediatric cardiologist and a review of the literature.

Gozar L, Marginean C, Toganel R, Muntean I.

Med Ultrason. 2017 Apr 22;19(2):232-235. doi: 10.11152/mu-892.

PMID: 28440361 Free Article

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  1. Automated T-wave analysis can differentiate acquired QT prolongation from congenital long QT syndrome.

Sugrue A, Noseworthy PA, Kremen V, Bos JM, Qiang B, Rohatgi RK, Sapir Y, Attia ZI, Brady P, Caraballo PJ, Asirvatham SJ, Friedman PA, Ackerman MJ.

Ann Noninvasive Electrocardiol. 2017 Apr 21. doi: 10.1111/anec.12455. [Epub ahead of print]

PMID: 28429460

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  1. Cardiac Transplantation in Children and Adolescents with Long QT Syndrome.

Kelle AM, Bos JM, Etheridge SP, Cannon BC, Bryant RM, Johnson JN, Ackerman MJ.

Heart Rhythm. 2017 Apr 14. pii: S1547-5271(17)30451-4. doi: 10.1016/j.hrthm.2017.04.023. [Epub ahead of print]

PMID: 28416468

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  1. Lidocaine Attenuation Testing: An In Vivo Investigation of Putative LQT3-Associated Variants in the SCN5A-Encoded Sodium Channel.

Heather N Anderson MD, Bos JM, Kapplinger JD, Meskill JM, Ye D, Ackerman MJ.

Heart Rhythm. 2017 Apr 12. pii: S1547-5271(17)30448-4. doi: 10.1016/j.hrthm.2017.04.020. [Epub ahead of print]

PMID: 28412158

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  1. The KCNH2-IVS9-28A/G mutation causes aberrant isoform expression and hERG trafficking defect in cardiomyocytes derived from patients affected by Long QT Syndrome type 2.

Mura M, Mehta A, Ramachandra CJ, Zappatore R, Pisano F, Ciuffreda MC, Barbaccia V, Crotti L, Schwartz PJ, Shim W, Gnecchi M.

Int J Cardiol. 2017 Apr 12. pii: S0167-5273(17)30298-X. doi: 10.1016/j.ijcard.2017.04.038. [Epub ahead of print]

PMID: 28433559

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  1. Evaluation of QTc in Rett syndrome: Correlation with age, severity, and genotype.

Crosson J, Srivastava S, Bibat GM, Gupta S, Kantipuly A, Smith-Hicks C, Myers SM, Sanyal A, Yenokyan G, Brenner J, Naidu SR.

Am J Med Genet A. 2017 Apr 10. doi: 10.1002/ajmg.a.38191. [Epub ahead of print]

PMID: 28394409

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  1. Noninvasive predictors of perioperative atrial arrhythmias in patients with tetralogy of Fallot undergoing pulmonary valve replacement.

Cortez D, Barham W, Ruckdeschel E, Sharma N, McCanta AC, von Alvensleben J, Sauer WH, Collins KK, Kay J, Patel S, Nguyen DT.

Clin Cardiol. 2017 Apr 10. doi: 10.1002/clc.22707. [Epub ahead of print]

PMID: 28394443 Free Article

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  1. Tachycardia cycle and atrioventricular nodal conduction properties in children with supraventricular tachycardia.

Mills M, Dubin AM, Motonaga KS, Ceresnak SR.

Pacing Clin Electrophysiol. 2017 Apr 6. doi: 10.1111/pace.13083. [Epub ahead of print] No abstract available.

PMID: 28383202

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  1. To the Editors-Risk factors for complications in the implantation of epicardial pacemakers in neonates and infants.

Kean AC, Rodefeld M.

Heart Rhythm. 2017 Apr 5. pii: S1547-5271(17)30314-4. doi: 10.1016/j.hrthm.2017.03.021. [Epub ahead of print] No abstract available.

PMID: 28389305

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  1. Interpreting Incidentally Identified Variants in Genes Associated With Catecholaminergic Polymorphic Ventricular Tachycardia in a Large Cohort of Clinical Whole-Exome Genetic Test Referrals.

Landstrom AP, Dailey-Schwartz AL, Rosenfeld JA, Yang Y, McLean MJ, Miyake CY, Valdes SO, Fan Y, Allen HD, Penny DJ, Kim JJ.

Circ Arrhythm Electrophysiol. 2017 Apr;10(4). pii: e004742. doi: 10.1161/CIRCEP.116.004742.

PMID: 28404607

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  1. Effect of Age and Sex on the QTc Interval in Children and Adolescents With Type 1 and 2 Long-QT Syndrome.

Vink AS, Clur SB, Geskus RB, Blank AC, De Kezel CC, Yoshinaga M, Hofman N, Wilde AA, Blom NA.

Circ Arrhythm Electrophysiol. 2017 Apr;10(4). pii: e004645. doi: 10.1161/CIRCEP.116.004645.

PMID: 28356306

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  1. J-Wave syndromes expert consensus conference report: Emerging concepts and gaps in knowledge.

Antzelevitch C, Yan GX, Ackerman MJ, Borggrefe M, Corrado D, Guo J, Gussak I, Hasdemir C, Horie M, Huikuri H, Ma C, Morita H, Nam GB, Sacher F, Shimizu W, Viskin S, Wilde AAM.

Europace. 2017 Apr 1;19(4):665-694. doi: 10.1093/europace/euw235. No abstract available.

PMID: 28431071

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  1. Corrigendum to ‘Ventricular tachyarrhythmia during pregnancy in women with heart disease: Data from the ROPAC, a registry from the European Society of Cardiology‘ [Int. J. Cardiol. 220 (2016) 131-136].

Ertekin E, van Hagen IM, Salam AM, Ruys TP, Johnson MR, Popelova J, Parsonage WA, Ashour Z, Shotan A, Oliver JM, Veldtman GR, Hall R, Roos-Hesselink JW.

Int J Cardiol. 2017 Apr 1;232:348. doi: 10.1016/j.ijcard.2017.01.077. Epub 2017 Jan 27. No abstract available.

PMID: 28139301 Free Article

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  1. Precision Cardiovascular Medicine: State of Genetic Testing.

Giudicessi JR, Kullo IJ, Ackerman MJ.

Mayo Clin Proc. 2017 Apr;92(4):642-662. doi: 10.1016/j.mayocp.2017.01.015. Review.

PMID: 28385198

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  1. Early Repolarization in Normal Adolescents is Common.

Ahmed H, Czosek RJ, Spar DS, Knilans TK, Anderson JB.

Pediatr Cardiol. 2017 Apr;38(4):864-872. doi: 10.1007/s00246-017-1594-9. Epub 2017 Apr 3.

PMID: 28367598

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  1. Arrhythmias After Fontan Operation with Intra-atrial Lateral Tunnel Versus Extra-cardiac Conduit: A Systematic Review and Meta-analysis.

Li D, Fan Q, Hirata Y, Ono M, An Q.

Pediatr Cardiol. 2017 Apr;38(4):873-880. doi: 10.1007/s00246-017-1595-8. Epub 2017 Mar 7.

PMID: 28271152

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  1. Lateral Atrial Tunnel Fontan Operation Predisposes to the Junctional Rhythm.

Januszewska K, Schuh A, Lehner A, Dalla-Pozza R, Malec E.

Pediatr Cardiol. 2017 Apr;38(4):712-718. doi: 10.1007/s00246-017-1571-3. Epub 2017 Feb 10.

PMID: 28184977

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  1. Effects of Triple Cryoenergy Application on Lesion Formation and Coronary Arteries in the Developing Myocardium.

Krause U, Abreu da Cunha FD, Backhoff D, Jacobshagen C, Klehs S, Schneider HE, Paul T.

Pediatr Cardiol. 2017 Apr;38(4):663-668. doi: 10.1007/s00246-016-1564-7. Epub 2017 Jan 11.

PMID: 28078383

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  1. ECGs in the ED.

Tanel RE.

Pediatr Emerg Care. 2017 Apr;33(4):309-310. doi: 10.1097/PEC.0000000000001149. No abstract available.

PMID: 28353534

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  1. [Our experience in the diagnosis and treatment of postural orthostatic tachycardia syndrome, vasovagal syncope, and inappropriate sinus tachycardia in children].

Ugan Atik S, Dedeoğlu R, Koka A, Öztunç F.

Turk Kardiyol Dern Ars. 2017 Apr;45(3):227-234. doi: 10.5543/tkda.2017.36517. Turkish.

PMID: 28429690 Free Article

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