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Somasundaram N, Von Bergen NH. High-density "APLE" Mapping-Activation, Propagation, Low Voltage, and Electrogram Evaluation with the HD Grid for Atrioventricular Nodal Re-entry Tachycardia Ablation. J Innov Card Rhythm Manag 2024; 15:5787-5793. [PMID: 38584748 PMCID: PMC10994155 DOI: 10.19102/icrm.2024.15034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Accepted: 07/02/2023] [Indexed: 04/09/2024] Open
Abstract
This is the first case series to evaluate high-density mapping of the triangle of Koch (TOK) using the HD Grid to guide slow-pathway ablation integrating activation, propagation (with wave collision), low-voltage signals, and atrial electrogram appearance. We will describe our technique and the results in this case series. Using three-dimensional mapping and the HD Grid, patients underwent high-density voltage mapping of the TOK. Ablation site selection was based on properties during sinus rhythm with late activation, at or above the propagation wave collision, over low voltage, and with appropriate electrogram appearance. Five patients underwent mapping of the slow pathway using the HD Grid. Their median age was 14 years, their median weight was 54.1 kg, and their median height was 161.5 cm. The TOK was mapped with the HD Grid for a median of 3 min. The procedure was successful in all patients using this technique. The median lesion number to the site of success was 3, with a median total number of cryotherapy lesions of 11. No radiation was used. There were no recurrences. Using activation, propagation wave, low voltage, and electrogram appearance when mapping for slow-pathway localization and ablation with the HD Grid can be successful, results in high-density maps, and is relatively faster.
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Affiliation(s)
| | - Nicholas H. Von Bergen
- Department of Pediatrics, The University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
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2
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Karim F, Peck D, Narasimhan S, Von Bergen NH. Epicardial Implantation of a Micra™ Pacemaker in a Premature Neonate with Congenital Complete Heart Block. J Innov Card Rhythm Manag 2024; 15:5739-5743. [PMID: 38304090 PMCID: PMC10829414 DOI: 10.19102/icrm.2024.15012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Accepted: 08/28/2023] [Indexed: 02/03/2024] Open
Abstract
Pacemaker implantation in neonates can be challenging due to their small size. Even pulse generators adapted for pediatric patients, such as the Microny device (Abbott, Chicago, IL, USA), are proportionately large in comparison to the size of the smallest newborns. Due to anatomic considerations, such as small vascular and ventricular sizes, leadless pacemakers and transvenous implantation in the youngest neonatal population remain unsuitable. Even so, the desire for leadless devices has prompted the industry to create the smallest pacemakers available. Adapting the smaller Micra™ transcatheter leadless pacing system (Medtronic, Minneapolis, MN, USA) for an epicardial pacing application may be advantageous to the smallest patients. This case illustrates the use of a Micra™ device modified with a header block to serve as the pulse generator in a ventricular epicardial pacing system for a 1-day-old, 2.68-kg patient with complete heart block.
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Affiliation(s)
- Farida Karim
- Pediatric Cardiology Department, Masonic Children’s Hospital, University of Minnesota, Minneapolis, MN, USA
| | - Daniel Peck
- Pediatric Cardiology Department, Masonic Children’s Hospital, University of Minnesota, Minneapolis, MN, USA
| | - Shanti Narasimhan
- Pediatric Cardiology Department, Masonic Children’s Hospital, University of Minnesota, Minneapolis, MN, USA
| | - Nicholas H. Von Bergen
- Pediatric Cardiology Department, Masonic Children’s Hospital, University of Minnesota, Minneapolis, MN, USA
- Pediatric Cardiology Department, The University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
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3
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Brown DH, Zhang X, Al-Subu AM, Von Bergen NH. Improvements in Accuracy and Confidence in Rhythm Identification After Cardiac Surgery Using the AtriAmp Signals. J Intensive Care Med 2023; 38:809-815. [PMID: 36938624 DOI: 10.1177/08850666231164613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/21/2023]
Abstract
Objectives: Following cardiac surgery, 50% to 60% of patients with congenital heart disease will experience an arrhythmia. These arrhythmias are associated with increased morbidity and mortality. Therefore, rapid and accurate identification is paramount to the improvement of patient outcome. We hypothesize that the AtriAmp, a device which allows atrial electrogram (AEG) display on the bedside monitors, will increase provider accuracy and confidence in arrhythmia diagnosis. Design: A prospective observational study. Electrograms were collected from post-operative patients from the bedside monitors surface ECG and an AEG using the AtriAmp. A 12-question online survey was given to critical care and cardiology providers at 9 different programs across the country as well as being posted to the AAP SOCC fall newsletter. Six questions displayed signals from only the surface leads, while the other 6 showed the same arrhythmias with an AEG obtained from the AtriAmp. Answers were then evaluated for confidence and accuracy. A paired t-test along with mixed method modeling was used to assess the data. Setting: Cardiac pediatric ICU. Subjects: Providers in pediatric cardiology and pediatric critical care were evaluated on their ability to diagnose arrhythmias on surface ECG and AEG obtained from bedside monitor. Interventions: The accuracy and confidence of diagnosis of both surface and AEG signals were evaluated through an on-line survey. Results: Eighty-eight providers completed the survey. The study showed that interpreting with the AtriAmp signal, compared to the surface ECG only, significantly increased the accuracy (P = .002) and confidence in provider rhythm diagnosis (P < .001). Junctional ectopic tachycardia, sinus tachycardia, and complete heart block had the most significant increase in accuracy of diagnose when using the AtriAmp signal (P < .001, P = .002, P = .010, respectively). Conclusion: Use of the AtriAmp increased provider accuracy and confidence in post-operative rhythm diagnosis when compared to diagnosis using the surface electrograms only.
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Affiliation(s)
- Diane H Brown
- Division of Pediatric Critical Care Medicine, Department of Pediatrics, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - Xiao Zhang
- Division of Pediatric Cardiology, Department of Pediatrics, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - Awni M Al-Subu
- Division of Pediatric Critical Care Medicine, Department of Pediatrics, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - Nicholas H Von Bergen
- Division of Pediatric Cardiology, Department of Pediatrics, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
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4
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Malloy‐Walton LE, Von Bergen NH, Balaji S, Fischbach PS, Garnreiter JM, Asaki SY, Moak JP, Ochoa LA, Chang PM, Nguyen HH, Patel AR, Kirk C, Sherman AK, Avari Silva JN, Saul JP. IV Sotalol Use in Pediatric and Congenital Heart Patients: A Multicenter Registry Study. J Am Heart Assoc 2022; 11:e024375. [PMID: 35491986 PMCID: PMC9238590 DOI: 10.1161/jaha.121.024375] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background There is limited information regarding the clinical use and effectiveness of IV sotalol in pediatric patients and patients with congenital heart disease, including those with severe myocardial dysfunction. A multicenter registry study was designed to evaluate the safety, efficacy, and dosing of IV sotalol. Methods and Results A total of 85 patients (age 1 day–36 years) received IV sotalol, of whom 45 (53%) had additional congenital cardiac diagnoses and 4 (5%) were greater than 18 years of age. In 79 patients (93%), IV sotalol was used to treat supraventricular tachycardia and 4 (5%) received it to treat ventricular arrhythmias. Severely decreased cardiac function by echocardiography was seen before IV sotalol in 7 (9%). The average dose was 1 mg/kg (range 0.5–1.8 mg/kg/dose) over a median of 60 minutes (range 30–300 minutes). Successful arrhythmia termination occurred in 31 patients (49%, 95% CI [37%–62%]) with improvement in rhythm control defined as rate reduction permitting overdrive pacing in an additional 18 patients (30%, 95% CI [19%–41%]). Eleven patients (16%) had significant QTc prolongation to >465 milliseconds after the infusion, with 3 (4%) to >500 milliseconds. There were 2 patients (2%) for whom the infusion was terminated early. Conclusions IV sotalol was safe and effective for termination or improvement of tachyarrhythmias in 79% of pediatric patients and patients with congenital heart disease, including those with severely depressed cardiac function. The most common dose, for both acute and maintenance dosing, was 1 mg/kg over ~60 minutes with rare serious complications.
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Affiliation(s)
| | | | | | | | | | - S. Yukiko Asaki
- University of Utah/Primary Children's Hospital Salt Lake City UT
| | | | | | - Philip M. Chang
- University of Florida/Shands Children`s Hospital Gainesville FL
| | | | | | | | | | | | - J. Philip Saul
- Department of Pediatrics West Virginia University School of Medicine Morgantown WV
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Silka MJ, Shah MJ, Silva JNA, Balaji S, Beach CM, Benjamin MN, Berul CI, Cannon B, Cecchin F, Cohen MI, Dalal AS, Dechert BE, Foster A, Gebauer R, Corcia MCG, Kannankeril PJ, Karpawich PP, Kim JJ, Krishna MR, Kubuš P, LaPage MJ, Mah DY, Malloy-Walton L, Miyazaki A, Motonaga KS, Niu MC, Olen M, Paul T, Rosenthal E, Saarel EV, Silvetti MS, Stephenson EA, Tan RB, Triedman J, Bergen NHV, Wackel PL. 2021 PACES Expert Consensus Statement on the Indications and Management of Cardiovascular Implantable Electronic Devices in Pediatric Patients: Executive Summary. Ann Pediatr Cardiol 2022; 15:323-346. [PMID: 36589659 PMCID: PMC9802608 DOI: 10.4103/0974-2069.361245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Affiliation(s)
- Michael J Silka
- University of Southern California Keck School of Medicine, Los Angeles, California
| | - Maully J Shah
- University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania
| | | | | | | | - Monica N Benjamin
- Hospital de Pediatría Juan P. Garrahan, Hospital El Cruce, Hospital Británico de Buenos Aires, Instituto Cardiovascular ICBA, Buenos Aires, Argentina
| | | | | | - Frank Cecchin
- New York University Grossman School of Medicine, New York, New York
| | | | - Aarti S Dalal
- Washington University in St. Louis, St. Louis, Missouri
| | | | - Anne Foster
- Advocate Children's Heart Institute, Chicago, Illinois
| | - Roman Gebauer
- Heart Centre Leipzig, University of Leipzig, Leipzig, Germany
| | | | | | - Peter P Karpawich
- University Pediatricians, Children's Hospital of Michigan, Detroit, Michigan
| | | | | | - Peter Kubuš
- Children's Heart Center, Charles University in Prague and Motol University Hospital, Prague, Czech Republic
| | | | | | | | - Aya Miyazaki
- Shizuoka General Hospital and Mt. Fuji Shizuoka Children's Hospital, Shizuoka, Japan
| | | | - Mary C Niu
- University of Utah Health Sciences Center, Salt Lake City, Utah
| | | | - Thomas Paul
- Georg-August-University Medical Center, Göttingen, Germany
| | - Eric Rosenthal
- Evelina London Children's Hospital and St Thomas' Hospital, Guy's & St Thomas' NHS Foundation Trust, London, United Kingdom
| | | | | | | | - Reina B Tan
- New York University Langone Health, New York, New York
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6
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Shah MJ, Silka MJ, Silva JNA, Balaji S, Beach CM, Benjamin MN, Berul CI, Cannon B, Cecchin F, Cohen MI, Dalal AS, Dechert BE, Foster A, Gebauer R, Gonzalez Corcia MC, Kannankeril PJ, Karpawich PP, Kim JJ, Krishna MR, Kubuš P, LaPage MJ, Mah DY, Malloy-Walton L, Miyazaki A, Motonaga KS, Niu MC, Olen M, Paul T, Rosenthal E, Saarel EV, Silvetti MS, Stephenson EA, Tan RB, Triedman J, Bergen NHV, Wackel PL. 2021 PACES Expert Consensus Statement on the Indications and Management of Cardiovascular Implantable Electronic Devices in Pediatric Patients: Developed in collaboration with and endorsed by the Heart Rhythm Society (HRS), the American College of Cardiology (ACC), the American Heart Association (AHA), and the Association for European Paediatric and Congenital Cardiology (AEPC) Endorsed by the Asia Pacific Heart Rhythm Society (APHRS), the Indian Heart Rhythm Society (IHRS), and the Latin American Heart Rhythm Society (LAHRS). JACC Clin Electrophysiol 2021; 7:1437-1472. [PMID: 34794667 DOI: 10.1016/j.jacep.2021.07.009] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
In view of the increasing complexity of both cardiovascular implantable electronic devices (CIEDs) and patients in the current era, practice guidelines, by necessity, have become increasingly specific. This document is an expert consensus statement that has been developed to update and further delineate indications and management of CIEDs in pediatric patients, defined as ≤21 years of age, and is intended to focus primarily on the indications for CIEDs in the setting of specific disease categories. The document also highlights variations between previously published adult and pediatric CIED recommendations and provides rationale for underlying important differences. The document addresses some of the deterrents to CIED access in low- and middle-income countries and strategies to circumvent them. The document sections were divided up and drafted by the writing committee members according to their expertise. The recommendations represent the consensus opinion of the entire writing committee, graded by class of recommendation and level of evidence. Several questions addressed in this document either do not lend themselves to clinical trials or are rare disease entities, and in these instances recommendations are based on consensus expert opinion. Furthermore, specific recommendations, even when supported by substantial data, do not replace the need for clinical judgment and patient-specific decision-making. The recommendations were opened for public comment to Pediatric and Congenital Electrophysiology Society (PACES) members and underwent external review by the scientific and clinical document committee of the Heart Rhythm Society (HRS), the science advisory and coordinating committee of the American Heart Association (AHA), the American College of Cardiology (ACC), and the Association for European Paediatric and Congenital Cardiology (AEPC). The document received endorsement by all the collaborators and the Asia Pacific Heart Rhythm Society (APHRS), the Indian Heart Rhythm Society (IHRS), and the Latin American Heart Rhythm Society (LAHRS). This document is expected to provide support for clinicians and patients to allow for appropriate CIED use, appropriate CIED management, and appropriate CIED follow-up in pediatric patients.
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Affiliation(s)
- Maully J Shah
- University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania, USA.
| | - Michael J Silka
- University of Southern California Keck School of Medicine, Los Angeles, California, USA.
| | | | | | | | - Monica N Benjamin
- Hospital de Pediatría Juan P. Garrahan, Hospital El Cruce, Hospital Británico de Buenos Aires, Instituto Cardiovascular ICBA, Buenos Aires, Argentina
| | | | | | - Frank Cecchin
- New York University Grossman School of Medicine, New York, New York, USA
| | | | - Aarti S Dalal
- Washington University in St. Louis, St. Louis, Missouri, USA
| | | | - Anne Foster
- Advocate Children's Heart Institute, Chicago, Illinois, USA
| | - Roman Gebauer
- Heart Centre Leipzig, University of Leipzig, Leipzig, Germany
| | | | | | - Peter P Karpawich
- University Pediatricians, Children's Hospital of Michigan, Detroit, Michigan, USA
| | | | | | - Peter Kubuš
- Children's Heart Center, Charles University in Prague and Motol University Hospital, Prague, Czech Republic
| | | | | | | | - Aya Miyazaki
- Shizuoka General Hospital and Mt. Fuji Shizuoka Children's Hospital, Shizuoka, Japan
| | | | - Mary C Niu
- University of Utah Health Sciences Center, Salt Lake City, Utah, USA
| | - Melissa Olen
- Nicklaus Children's Hospital, Miami, Florida, USA
| | - Thomas Paul
- Georg-August-University Medical Center, Göttingen, Germany
| | - Eric Rosenthal
- Evelina London Children's Hospital and St Thomas' Hospital, Guy's & St Thomas' NHS Foundation Trust, London, United Kingdom
| | | | | | | | - Reina B Tan
- New York University Langone Health, New York, New York, USA
| | | | - Nicholas H Von Bergen
- University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, USA
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7
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Silka MJ, Shah MJ, Silva JNA, Balaji S, Beach CM, Benjamin MN, Berul CI, Cannon B, Cecchin F, Cohen MI, Dalal AS, Dechert BE, Foster A, Gebauer R, Gonzalez Corcia MC, Kannankeril PJ, Karpawich PP, Kim JJ, Krishna MR, Kubuš P, LaPage MJ, Mah DY, Malloy-Walton L, Miyazaki A, Motonaga KS, Niu MC, Olen M, Paul T, Rosenthal E, Saarel EV, Silvetti MS, Stephenson EA, Tan RB, Triedman J, Von Bergen NH, Wackel PL. 2021 PACES Expert Consensus Statement on the Indications and Management of Cardiovascular Implantable Electronic Devices in Pediatric Patients: Executive Summary. Heart Rhythm 2021; 18:1925-1950. [PMID: 34363987 DOI: 10.1016/j.hrthm.2021.07.051] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Accepted: 07/19/2021] [Indexed: 10/20/2022]
Affiliation(s)
- Michael J Silka
- University of Southern California Keck School of Medicine, Los Angeles, California.
| | - Maully J Shah
- University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania.
| | | | | | | | - Monica N Benjamin
- Hospital de Pediatría Juan P. Garrahan, Hospital El Cruce, Hospital Británico de Buenos Aires, Instituto Cardiovascular ICBA, Buenos Aires, Argentina
| | | | | | - Frank Cecchin
- New York University Grossman School of Medicine, New York, New York
| | | | - Aarti S Dalal
- Washington University in St. Louis, St. Louis, Missouri
| | | | - Anne Foster
- Advocate Children's Heart Institute, Chicago, Illinois
| | - Roman Gebauer
- Heart Centre Leipzig, University of Leipzig, Leipzig, Germany
| | | | | | - Peter P Karpawich
- University Pediatricians, Children's Hospital of Michigan, Detroit, Michigan
| | | | | | - Peter Kubuš
- Children's Heart Center, Charles University in Prague and Motol University Hospital, Prague, Czech Republic
| | | | | | | | - Aya Miyazaki
- Shizuoka General Hospital and Mt. Fuji Shizuoka Children's Hospital, Shizuoka, Japan
| | | | - Mary C Niu
- University of Utah Health Sciences Center, Salt Lake City, Utah
| | | | - Thomas Paul
- Georg-August-University Medical Center, Göttingen, Germany
| | - Eric Rosenthal
- Evelina London Children's Hospital and St Thomas' Hospital, Guy's & St Thomas' NHS Foundation Trust, London, United Kingdom
| | | | | | | | - Reina B Tan
- New York University Langone Health, New York, New York
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8
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Peotter AM, Brown DR, Kalscheur MR, Von Bergen NH. Atrial Electrography for Postoperative Tachyarrhythmia Analysis in Patients. J Innov Card Rhythm Manag 2021; 12:4726-4743. [PMID: 34712508 PMCID: PMC8545439 DOI: 10.19102/icrm.2021.121003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Accepted: 04/19/2021] [Indexed: 11/06/2022] Open
Abstract
The over 400,000 cardiac surgeries performed in the United States each year hold a risk for the postoperative complication of arrhythmias. Currently, bedside monitoring of surface electrocardiogram leads is used to interpret arrhythmias despite the evidence that atrial electrograms (AEGs) offer superior rhythm discrimination. This hesitancy to use the AEG may be due to a lack of training for practitioners in interpreting AEGs; therefore, our goal was to create an algorithm for the diagnosis of tachyarrhythmia using an AEG that can be utilized by any health care practitioner. Our algorithm classifies the most prevalent type of tachyarrhythmias following cardiac surgery. To allow rhythm identification, we categorized them based on their atrial to ventricular signal ratio, which is uniquely apparent on AEGs. Other considerations were given to rhythm regularity, consistency, P-wave axis, and rate. The algorithm includes the most common postoperative arrhythmias differentiated based on a unique branch-point approach, which walks through the steps in arrhythmia discrimination. Both rendered and collected AEGs are included as references for further understanding and interpretation of tachyarrhythmias. The utility of AEGs for rhythm discrimination post-cardiac surgery is established and recent technology can provide real-time and continuous monitoring; however, practitioner training may be inadequate. To bridge this divide, we created an algorithm so that existing atrial wires can be better used for an enhanced rhythm interpretation via AEGs.
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Affiliation(s)
- Ashley M Peotter
- The University of Wisconsin School of Medicine and Public Heath, Madison WI, USA
| | - Diane R Brown
- Division of Pediatric Intensive Care, Department of Pediatrics, University of Wisconsin School of Medicine and Public Heath, Madison WI, USA
| | - Matthew R Kalscheur
- Division of Cardiology, Department of Internal Medicine, University of Wisconsin School of Medicine and Public Heath, Madison WI, USA
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9
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Somasundaram N, Boadu JK, Von Bergen NH. First-in-human use of a continuous real-time atrial electrogram monitoring device after cardiac surgery. HeartRhythm Case Rep 2021; 7:251-254. [PMID: 34026507 PMCID: PMC8129038 DOI: 10.1016/j.hrcr.2021.01.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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10
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Robinson JA, LaPage MJ, Atallah J, Webster G, Miyake CY, Ratnasamy C, Ollberding NJ, Mohan S, Von Bergen NH, Johnsrude CL, Garnreiter JM, Spar DS, Czosek RJ. Outcomes of Pediatric Patients With Defibrillators Following Initial Presentation With Sudden Cardiac Arrest. Circ Arrhythm Electrophysiol 2021; 14:e008517. [PMID: 33401923 DOI: 10.1161/circep.120.008517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND Implantable cardioverter defibrillators (ICD) are recommended for secondary prevention after sudden cardiac arrest (SCA). The outcomes of pediatric patients receiving an ICD after SCA remain unclear. The objective of this study is to evaluate outcomes, future risk for appropriate shocks, and identify characteristics associated with appropriate ICD therapy during follow-up. METHODS Multicenter retrospective analysis of patients (age ≤21 years) without prior cardiac disease who received an ICD following SCA. Patient/device characteristics, cardiac function, and underlying diagnoses were collected, along with SCA event characteristics. Patient outcomes including complications and device therapies were analyzed. RESULTS In total, 106 patients were included, median age 14.7 years. Twenty (19%) received appropriate shocks and 16 (15%) received inappropriate shocks (median follow-up 3 years). First-degree relative with SCA was associated with appropriate shocks (P<0.05). In total, 40% patients were considered idiopathic. Channelopathy was the most frequent late diagnosis not made at time of presentation. Neither underlying diagnosis nor idiopathic status was associated with increased incidence of appropriate shock. Monomorphic ventricular tachycardia (hazard ratio, 4.6 [1.2-17.3]) and family history of sudden death (hazard ratio, 6.5 [1.4-29.8]) were associated with freedom from appropriate shock in a multivariable model (area under the receiver operating characteristic curve, 0.8). Time from diagnoses to evaluation demonstrated a nonlinear association with freedom from appropriate shock (P=0.015). In patients >2 years from implantation, younger age (P=0.02) and positive exercise test (P=0.04) were associated with appropriate shock. CONCLUSIONS The risk of future device therapy is high in pediatric patients receiving an ICD after SCA, irrelevant of underlying disease. Lack of a definitive diagnosis after SCA was not associated with lower risk of subsequent events and does not obviate the need for secondary prophylaxis.
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MESH Headings
- Adolescent
- Child
- Child, Preschool
- Death, Sudden, Cardiac/epidemiology
- Death, Sudden, Cardiac/prevention & control
- Defibrillators, Implantable
- Electric Countershock/instrumentation
- Female
- Humans
- Incidence
- Infant
- Infant, Newborn
- Male
- Primary Prevention/methods
- Retrospective Studies
- Risk Assessment/methods
- Risk Factors
- Secondary Prevention/methods
- Survival Rate/trends
- Tachycardia, Ventricular/mortality
- Tachycardia, Ventricular/physiopathology
- Tachycardia, Ventricular/therapy
- Treatment Outcome
- United States/epidemiology
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Affiliation(s)
- Jeffrey A Robinson
- The Heart Institute (J.A.R., D.S.S., R.J.C.), Cincinnati Children's Hospital Medical Center, OH
- Dr. C.C. & Mabel L. Criss Heart Center, Children's Hospital & Medical Center, University of Nebraska Medical Center, Omaha (J.A.R.)
| | - Martin J LaPage
- C.S. Mott Children's Hospital, University of Michigan, Ann Arbor (M.J.L.)
| | - Joseph Atallah
- Department of Pediatrics, University of Alberta, Edmonton, Canada (J.A.)
| | - Gregory Webster
- Ann & Robert H. Lurie Children's Hospital of Chicago, Northwestern University Feinberg School of Medicine, IL (G.W.)
| | | | - Christopher Ratnasamy
- Congenital Heart Center, Spectrum Health, Helen DeVos Children's Hospital, Grand Rapids, MI (C.R.)
| | | | - Shaun Mohan
- University of Kentucky HealthCare, Lexington (S.M.)
| | - Nicholas H Von Bergen
- American Family Children's Hospital, University of Wisconsin School of Medicine & Public Health, Madison (N.H.V.B.)
| | | | | | - David S Spar
- The Heart Institute (J.A.R., D.S.S., R.J.C.), Cincinnati Children's Hospital Medical Center, OH
- Division of Biostatistics & Epidemiology (D.S.S., R.J.C.), Cincinnati Children's Hospital Medical Center, OH
| | - Richard J Czosek
- The Heart Institute (J.A.R., D.S.S., R.J.C.), Cincinnati Children's Hospital Medical Center, OH
- Division of Biostatistics & Epidemiology (D.S.S., R.J.C.), Cincinnati Children's Hospital Medical Center, OH
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11
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Von Bergen NH, Anagnostopoulos PV. Commentary: What is invisible to the eye could be seen through the heart: How advancements to the visualization of the conduction tissue can improve surgical and electrophysiology procedures. J Thorac Cardiovasc Surg 2020; 160:500-501. [PMID: 32279964 DOI: 10.1016/j.jtcvs.2020.02.091] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Accepted: 02/19/2020] [Indexed: 10/24/2022]
Affiliation(s)
- Nicholas H Von Bergen
- The Congenital Heart Program, The American Family Children's Hospital, The University of Wisconsin Hospital and Clinics, Madison, Wis
| | - Petros V Anagnostopoulos
- The Congenital Heart Program, The American Family Children's Hospital, The University of Wisconsin Hospital and Clinics, Madison, Wis.
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12
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Maghrabi K, Uzun O, Kirsh JA, Balaji S, Von Bergen NH, Sanatani S. Cardiovascular Collapse with Intravenous Amiodarone in Children: A Multi-Center Retrospective Cohort Study. Pediatr Cardiol 2019; 40:925-933. [PMID: 30929065 DOI: 10.1007/s00246-019-02090-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Accepted: 03/13/2019] [Indexed: 11/24/2022]
Abstract
OBJECTIVE To determine the incidence of cardiovascular collapse in children receiving intravenous (IV) amiodarone and to identify the population at risk. DESIGN A multicenter study of patients ≤ 18 years of age who received intravenous amiodarone between January 2005 and December 2015. A retrospective analysis was performed to identify patients who developed cardiovascular collapse (bradycardia and/or hypotension). RESULTS Of 456 patients who received amiodarone, cardiovascular collapse occurred in 47 patients (10%). Patient risk factors for collapse in a univariate analysis were as follows: age < 3 months (p = 0.04), depressed cardiac function (p < 0.001), blood pressure below 3rd percentile (p < 0.001), high lactate at baseline (p < 0.001). Administration risk factors included bolus administration (p = 0.04), and bolus administration over ≤ 20 min (p = 0.04). In multivariate analysis, age, baseline blood pressure less than 3rd percentile, and rapid bolus delivery were independent risk factors for cardiovascular collapse in the study group. The mortality rate was significantly higher in the collapse group (28% versus 8%). CONCLUSION We found an association between IV amiodarone administration and the risk of developing cardiovascular collapse in a significant subset of children. Extreme caution and careful hemodynamic monitoring is recommended when using IV amiodarone in this population, especially in young infants, hemodynamically compromised patients, and in patients receiving rapid amiodarone bolus administration.
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Affiliation(s)
- Khadijah Maghrabi
- Department of Pediatrics, Abdullah Bakhsh Children's Heart Center, King Abdulaziz University, PO Box 80215, Jeddah, 21589, Saudi Arabia.
| | - Orhan Uzun
- Department of Paediatric Cardiology, University Hospital Wales, Cardiff, UK
| | - Joel A Kirsh
- Department of Pediatrics, The Hospital for Sick Children, University of Toronto, Toronto, ON, Canada.,Forensic Services and Coroners Complex, Office of the Chief Coroner for Ontario, Toronto, Canada
| | - Seshadri Balaji
- Department of Pediatrics, Oregon Health and Science University, Portland, OR, USA
| | | | - Shubhayan Sanatani
- Children's Heart Centre, University of British Columbia, Vancouver, BC, Canada
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13
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Kipp RT, Boynton JR, Field ME, Wang JF, Bares A, Leal MA, Von Bergen NH, Eckhardt LL. Outcomes During Intended Fluoroscopy-free Ablation in Adults and Children. J Innov Card Rhythm Manag 2018. [PMID: 30568847 PMCID: PMC6296490 DOI: 10.19102/icrm.2018.090904] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Electroanatomic mapping (EAM) systems facilitate the elimination of fluoroscopy during electrophysiologic (EP) studies and ablations. The rate and predictors of fluoroscopy requirements while attempting fluoroscopy-free (FF) ablations are unclear. This study aimed (1) to investigate the rates of fluoroscopic use and acute success in patients initially referred for FF ablation and (2) to identify procedural characteristics associated with fluoroscopic use in patients in whom FF ablation was initially planned (IFF). We performed a retrospective review of all patients who underwent IFF EP study or ablation between 2010 and 2013. Patient and procedural characteristics were compared between those with successful FF procedures and those who subsequently required fluoroscopy during their procedure. An FF EP study with or without ablation was performed in 124 patients during 138 procedures for either supraventricular or idiopathic ventricular arrhythmias. Of the 138 procedures, 105 of them were performed without fluoroscopy. In the remaining 33 cases, fluoroscopy was used for an average of 1.21 minutes ± 1.18 minutes. Acute procedural success was achieved in 97% of both FF and fluoroscopy procedures. The primary reason for fluoroscopy use was as a guide for transseptal puncture. There were no significant differences between FF and fluoroscopy procedures with respect to catheter placement time or complication rate. In conclusion, in this single-center study of IFF procedures, despite careful case selection for IFF ablation, 24% of IFF cases ultimately required minimal fluoroscopy. Fluoroscopy and FF procedures had similar rates of procedural success and complications. Additional large prospective studies are required to further investigate the safety and efficacy of FF ablations.
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Affiliation(s)
- Ryan T. Kipp
- Electrophysiology Service, Division of Cardiovascular Medicine, Department of Medicine, University of Wisconsin Children’s Hospital, Madison, WI, USA
| | - Jason R. Boynton
- Electrophysiology Service, Division of Cardiovascular Medicine, Department of Medicine, University of Wisconsin Children’s Hospital, Madison, WI, USA
| | - Michael E. Field
- Electrophysiology Service, Division of Cardiovascular Medicine, Department of Medicine, University of Wisconsin Children’s Hospital, Madison, WI, USA
| | - Jesse F. Wang
- Electrophysiology Service, Division of Cardiovascular Medicine, Department of Medicine, University of Wisconsin Children’s Hospital, Madison, WI, USA
| | - Anton Bares
- University of Wisconsin Hospitals and Clinics, Madison, WI, USA
| | - Miguel A. Leal
- Electrophysiology Service, Division of Cardiovascular Medicine, Department of Medicine, University of Wisconsin Children’s Hospital, Madison, WI, USA
| | - Nicholas H. Von Bergen
- Pediatric Electrophysiology, Department of Pediatrics, University of Wisconsin Children’s Hospital, Madison, WI, USA
| | - Lee L. Eckhardt
- Electrophysiology Service, Division of Cardiovascular Medicine, Department of Medicine, University of Wisconsin Children’s Hospital, Madison, WI, USA
- Address correspondence to: Lee L. Eckhardt, MD, 1111 Highland Avenue, WIMR2 8431, Madison, WI 53717, USA.
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14
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Field ME, Laffin JJ, Langberg JJ, Von Bergen NH. Isolated Wolff-Parkinson-White syndrome in identical twins. HeartRhythm Case Rep 2018; 4:138-140. [PMID: 29755940 PMCID: PMC5944030 DOI: 10.1016/j.hrcr.2018.01.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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15
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Van Aartsen A, Law IH, Maldonado JR, Von Bergen NH. Propagation Mapping Wave Collision Correlates to the Site of Successful Ablation During Voltage Mapping in Atrioventricular Nodal Reentry Tachycardia. J Innov Card Rhythm Manag 2017; 8:2836-2842. [PMID: 32494469 PMCID: PMC7252827 DOI: 10.19102/icrm.2017.080905] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Accepted: 07/02/2017] [Indexed: 11/06/2022] Open
Abstract
Voltage mapping has been used previously for slow-pathway localization for atrioventricular nodal reentrant tachycardia (AVNRT) ablation. However, propagation mapping may be a technique to further improve the localization of the slow pathway. This retrospective study aimed to evaluate the relationship of the propagation map to both the voltage mapping and successful site of ablation in patients who underwent ablation for AVNRT. All patients ≤20 years of age who underwent voltage mapping for AVNRT were included in this study. Patients were excluded if they had congenital heart disease or inadequate voltage point density within the triangle of Koch (TK). During the study, a propagation map was evaluated from the prior voltage map, marking a "wave collision" at the site of atrial wave convergence. Patient and procedural information, the location of the wave collision, the site of successful ablation, and the appearance of the voltage map were evaluated. Ultimately, 39 patients aged from four years of age to 20 years of age were evaluated. Success was achieved in 100% of patients, with a recurrence rate of 2.8% and no long-term complications observed. The average procedure time was 127 min. Follow-up length averaged seven months post operation. Low-voltage areas, and a wave collision, were present in all patients. This wave collision was typically located within the TK. The median number of ablations required for successful outcome was two. The successful ablation lesion was typically located over a low-voltage area within 4 mm of the wave collision within the TK. In conclusion, we found in this retrospective evaluation that propagation mapping resulted in a wave collision within the TK, and that the successful ablation site in the majority of patients was near a low-voltage area within 4 mm, typically superiorly, to the wave collision within the TK.
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Affiliation(s)
- Amy Van Aartsen
- Division of Cardiology, Department of Pediatrics, The University of Wisconsin-Madison, Madison, WI
| | - Ian H Law
- Division of Cardiology, Department of Pediatrics, The University of Iowa, Iowa City, IA
| | - Jennifer R Maldonado
- Division of Cardiology, Department of Pediatrics, The University of Iowa, Iowa City, IA
| | - Nicholas H Von Bergen
- Division of Cardiology, Department of Pediatrics, The University of Wisconsin-Madison, Madison, WI
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16
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Evans WN, Acherman RJ, Law IH, Von Bergen NH, Samson RA, Restrepo H. Neonatal complex arrhythmias possibly related to a TTN mutation. J Neonatal Perinatal Med 2017; 10:343-346. [PMID: 28854511 DOI: 10.3233/npm-16120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We describe a neonate born with complex arrhythmias that included concurrent atrial and ventricular tachycardias. Genetic testing demonstrated a mutation in the TTN gene, which codes for titin, a large protein found in striated muscle sarcomeres. The complex arrhythmias were successfully treated with amiodarone and flecainide. The patient remains asymptomatic with normal biventricular function. We speculate that the complex arrhythmias and TTN gene mutation may be related.
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Affiliation(s)
- William N Evans
- Children's Heart Center Nevada, Las Vegas, NV, USA
- Department of Pediatrics, Division of Cardiology, University of Nevada, Reno School of Medicine, Las Vegas, NV, USA
| | - Ruben J Acherman
- Children's Heart Center Nevada, Las Vegas, NV, USA
- Department of Pediatrics, Division of Cardiology, University of Nevada, Reno School of Medicine, Las Vegas, NV, USA
| | - Ian H Law
- Children's Heart Center Nevada, Las Vegas, NV, USA
- Department of Pediatrics, Division of Cardiology, University of Iowa Carver College of Medicine, Iowa City, USA
| | - Nicholas H Von Bergen
- Children's Heart Center Nevada, Las Vegas, NV, USA
- Department of Pediatrics, Division of Cardiology, University of Wisconsin-Madison, Madison, WI, USA
| | - Ricardo A Samson
- Children's Heart Center Nevada, Las Vegas, NV, USA
- Department of Pediatrics, Division of Cardiology, University of Nevada, Reno School of Medicine, Las Vegas, NV, USA
| | - Humberto Restrepo
- Children's Heart Center Nevada, Las Vegas, NV, USA
- Department of Pediatrics, Division of Cardiology, University of Nevada, Reno School of Medicine, Las Vegas, NV, USA
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17
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Van Ert HA, McCune EC, Orland KM, Maginot KR, Von Bergen NH, January CT, Eckhardt LL. Flecainide treats a novel KCNJ2 mutation associated with Andersen-Tawil syndrome. HeartRhythm Case Rep 2016; 3:151-154. [PMID: 28491792 PMCID: PMC5420046 DOI: 10.1016/j.hrcr.2016.11.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Affiliation(s)
- Hanora A Van Ert
- Cellular and Molecular Arrhythmia Research Program, University of Wisconsin-Madison, Madison, Wisconsin
| | - Elise C McCune
- Cellular and Molecular Arrhythmia Research Program, University of Wisconsin-Madison, Madison, Wisconsin
| | - Kate M Orland
- University of Wisconsin-Madison Inherited Arrhythmia Clinic, Division of Cardiovascular Medicine, Department of Medicine, University of Wisconsin-Madison, Madison, Wisconsin
| | - Kathleen R Maginot
- University of Wisconsin-Madison Inherited Arrhythmia Clinic, Division of Cardiovascular Medicine, Department of Medicine, University of Wisconsin-Madison, Madison, Wisconsin
| | - Nicholas H Von Bergen
- University of Wisconsin-Madison Inherited Arrhythmia Clinic, Division of Cardiovascular Medicine, Department of Medicine, University of Wisconsin-Madison, Madison, Wisconsin
| | - Craig T January
- Cellular and Molecular Arrhythmia Research Program, University of Wisconsin-Madison, Madison, Wisconsin.,University of Wisconsin-Madison Inherited Arrhythmia Clinic, Division of Cardiovascular Medicine, Department of Medicine, University of Wisconsin-Madison, Madison, Wisconsin
| | - Lee L Eckhardt
- Cellular and Molecular Arrhythmia Research Program, University of Wisconsin-Madison, Madison, Wisconsin.,University of Wisconsin-Madison Inherited Arrhythmia Clinic, Division of Cardiovascular Medicine, Department of Medicine, University of Wisconsin-Madison, Madison, Wisconsin
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18
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Abstract
Emery-Dreifuss muscular dystrophy (EDMD) is characterized by the clinical triad of scapulohumeroperoneal muscle weakness, joint contractures, and cardiac defects that include arrhythmias and dilated cardiomyopathy. Although there is a defining group of clinical findings, the proteins responsible and their underlying gene defects leading to EDMD are varied. A common aspect of the gene defects is their involvement in, or with, the nuclear envelope. Treatment approaches are largely based on clinical symptoms. The genetic diversity of EDMD predicts that a cure will ultimately depend upon the individual's defect at the gene level, making this an ideal candidate for a precision medicine approach.
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Affiliation(s)
- De-Ann M Pillers
- Division of Neonatology and Newborn Medicine, Department of Pediatrics, University of Wisconsin-Madison, Madison, WI, USA
| | - Nicholas H Von Bergen
- Division of Cardiology, Department of Pediatrics, University of Wisconsin-Madison, Madison, WI, USA
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19
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Linder JR, Stauss HM, Gindes H, Pierce GL, Von Bergen NH, Haynes WG, Fiedorowicz JG. Finger volume pulse waveforms facilitate reliable assessment of heart rate variability, but not blood pressure variability or baroreflex function. BMC Cardiovasc Disord 2014; 14:180. [PMID: 25487432 PMCID: PMC4269858 DOI: 10.1186/1471-2261-14-180] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2014] [Accepted: 11/26/2014] [Indexed: 11/26/2022] Open
Abstract
Background We sought to determine whether heart rate variability (HRV), blood pressure (BP) variability, and baroreceptor-heart rate reflex sensitivity can be reliably assessed using finger volume pulse waveforms obtained from the commercially available EndoPAT device. Methods Non-invasive BP (Finometer Pro as a non-invasive standard) and finger volume (EndoPAT) waveforms were recorded in 65 adults (37 ± 14 years; 60% female) and systolic BP and heart rate (HR) time series were derived after calibrating the EndoPAT signal based on systolic and diastolic BP values obtained by a sphygomomanometer. Transfer function analyses were performed to test for coherence between systolic BP and HR time series derived from the Finometer and EndoPAT devices. Time-domain HRV parameters, frequency domain HR and systolic BP variability parameters, and baroreflex sensitivity (sequence technique) were computed from Finometer- and EndoPAT-derived time series and intraclass correlation coefficients (ICC) were calculated. Results Squared coherence between systolic BP time series derived from the Finometer and EndoPAT devices was low, suggesting poor correlation. In contrast, squared coherence between HR time series derived from the two devices was excellent [High Frequency (HF) = 0.80, Low Frequency (LF) = 0.81], with gain values close to 1.0. ICC values for time- and frequency-domain HRV parameters were excellent (>0.9 except for relative HF HRV, which was 0.77), while ICC values for frequency-domain BP variability parameters and baroreceptor-HR reflex sensitivity were low. Conclusions Finger volume pulse waveforms can be used to reliably assess both time-domain and frequency-domain HR variability. However, frequency domain BP variability parameters cannot be reliably assessed from finger volume pulse waveforms using the simple calibration technique used in this study.
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Affiliation(s)
| | | | | | | | | | | | - Jess G Fiedorowicz
- Department of Internal Medicine, The University of Iowa, Iowa City, IA 52242, USA.
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20
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Kamp AN, Von Bergen NH, Henrikson CA, Makhoul M, Saarel EV, Lapage MJ, Russell MW, Strieper M, Yu S, Dick M, Day SM, Bradley DJ. Implanted defibrillators in young hypertrophic cardiomyopathy patients: a multicenter study. Pediatr Cardiol 2013; 34:1620-7. [PMID: 23512332 DOI: 10.1007/s00246-013-0676-6] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/02/2012] [Accepted: 02/13/2013] [Indexed: 01/01/2023]
Abstract
Hypertrophic cardiomyopathy (HCM) is the most common genetic cardiovascular disease, with an annual risk of sudden cardiac death (SCD) estimated at 1 %. Limited data are available regarding both the risk of SCD in the young HCM population and the use of implantable cardioverter-defibrillators (ICDs). This retrospective study included all patients with HCM who underwent ICD implantation for primary or secondary prevention of SCD before the age of 30 years at five institutions between 1995 and 2009. There were 99 devices implanted in 73 patients. Appropriate shocks occurred for 11 % of all the patients. None of the previously identified conventional risk factors for SCD in HCM patients were associated with increased risk of appropriate shocks in the young study cohort. During a median follow-up period of 2.4 years, inappropriate shocks occurred for 22 % of the patients. Older age at implant was associated with a decreased risk of inappropriate shock. Those who underwent implantation in the earlier decade had a higher incidence of inappropriate shocks. Late complications including lead fracture or dislodgement, generator malfunction, and infection occurred for 32 % of the patients. Three patients died (4 %), one of whom had an arrhythmic sudden death. A greater proportion of primary prevention implantations was performed for patients from the latter decade. Over time, ICD use in young HCM patients has become increasingly primary prevention oriented. Shock rates mirror those reported in adult series, and there is a substantial incidence of device complications.
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Affiliation(s)
- Anna N Kamp
- MN150 Chandler Medical Center, University of Kentucky, Lexington, KY, 40536-0298, USA,
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21
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Von Bergen NH, Law IH. AV nodal reentrant tachycardia in children: Current approaches to management. Progress in Pediatric Cardiology 2013. [DOI: 10.1016/j.ppedcard.2012.11.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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22
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Das S, Law IH, Von Bergen NH, Bradley DJ, Dick M, Etheridge SP, Saarel EV, Frias PA, Strieper MJ, Fischbach PS. Cryoablation therapy for atrioventricular nodal reentrant tachycardia in children: a multicenter experience of efficacy. Pediatr Cardiol 2012; 33:1147-53. [PMID: 22430375 DOI: 10.1007/s00246-012-0273-0] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/10/2011] [Accepted: 02/27/2012] [Indexed: 10/28/2022]
Abstract
Atrioventricular nodal reentrant tachycardia (AVNRT), a common tachycardia in children, is routinely treated by catheter ablation using radiofrequency or cryothermal energy. Acute success rates of 95-97 % are reported for cryoablation, similar to those achieved with radiofrequency ablation (RFA). However, early studies reported higher recurrence rates after cryoablation for treatment of AVNRT than those reported for RFA. This study evaluated the success and recurrence rates for cryoablation in a current cohort of pediatric patients across several institutions. Patients 21 years old or younger with AVNRT who underwent cryoablation at five participating centers between 2004 and 2009 were retrospectively reviewed. Patient demographics and procedural data were extracted from patient records and analyzed. A total of 434 patients with AVNRT who underwent cryoablation were identified. Cryoablation was used as the exclusive ablation method for 379 patients. For 97 % (368/379) of these patients, cryoablation was acutely successful. A higher acute success rate was found with the 6-mm-tip catheter (99 %) than with the 4-mm-tip catheter (91 %) (p < 0.01). Recurrence was experienced by 7.3 % of the patients. Recurrence was more likely for those treated with the 4-mm-tip catheter (6/42, 14 %) than for those who had the larger catheters (12/204, 6 %) No patient experienced permanent heart block. Success and recurrence rates for this cohort of patients were similar to those reported for RFA used to treat AVNRT in pediatric patients. The findings show a higher success rate and a lower recurrence rate after cryoablation with a 6-mm-tip catheter than after use of the 4-mm-tip catheter, with an associated excellent safety profile.
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Affiliation(s)
- Srikant Das
- Sibley Heart Center, Children's Healthcare of Atlanta, Emory University, 2835 Brandywine Road, Ste. 300, Atlanta, GA 30341, USA
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23
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Von Bergen NH, Bansal S, Gingerich J, Law IH. Nonfluoroscopic and radiation-limited ablation of ventricular arrhythmias in children and young adults: a case series. Pediatr Cardiol 2011; 32:743-7. [PMID: 21442398 DOI: 10.1007/s00246-011-9956-1] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/28/2010] [Accepted: 03/14/2011] [Indexed: 10/18/2022]
Abstract
The purpose of this study was to report the feasibility and procedural technique of minimal or no fluoroscopy in the ablation of ventricular arrhythmias in the pediatric population. A retrospective review was performed of all patients <21 years old who underwent ablation of ventricular arrhythmias using three-dimensional (3D) mapping with no or minimal fluoroscopy at a single institution. Five patients underwent electrophysiology studies for ventricular tachycardia or frequent premature ventricular complexes. Three patients had right-sided arrhythmias, and two patients had left-sided arrhythmias. Electro-anatomic mapping with the 3D EnSite NavX system and radiofrequency ablation was used in all patients. No fluoroscopy was used in the patients with right-sided arrhythmias. The two patients with left-sided arrhythmias had 1.0 and 1.9 min of fluoroscopy, respectively. The mean procedure time was 168 min (range 95 to 270). There has been no recurrence at mean follow-up of >1 year. Three-dimensional mapping systems have allowed pediatric electrophysiologic procedures to be performed with minimal to no fluoroscopy in patients with challenging arrhythmias, including ventricular arrhythmias. The decrease in radiation exposure decreases the risk of long-term adverse sequelae resulting from radiation exposure, which is especially important in children.
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Affiliation(s)
- Nicholas H Von Bergen
- The University of Iowa Children's Hospital, Carver College of Medicine, University of Iowa, 200 Hawkins Drive, Iowa City, IA 52246, USA.
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24
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Von Bergen NH, Atkins DL, Dick M, Bradley DJ, Etheridge SP, Saarel EV, Fischbach PS, Balaji S, Sreeram N, Evans WN, Law IH. Multicenter study of the effectiveness of implantable cardioverter defibrillators in children and young adults with heart disease. Pediatr Cardiol 2011; 32:399-405. [PMID: 21210096 DOI: 10.1007/s00246-010-9866-7] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/26/2010] [Accepted: 12/07/2010] [Indexed: 01/26/2023]
Abstract
Implantable cardioverter defibrillators (ICDs) are being used with increasing frequency in children and young adults. Our aim was to examine the appropriateness and frequency of ICD discharges in children and young adults, to compare the effectiveness of ICDs when placed for primary or secondary prevention, and to provide time-dependent analysis of ICD discharges. Data were collected from seven institutions on 210 patients <30 years of age who underwent ICD implantation from October 1992 to January 2007. Median age at implant was 15.4 years with a follow-up average of 3.3 years. Heart disease was categorized as electrical (n = 90, 42%), cardiomyopathic (n = 62, 30%), or congenital heart disease (n = 58, 28%). ICDs are increasingly placed for primary prevention. There are increased appropriate ICD discharges for ICDs placed for secondary prevention (52%) versus primary prevention (14%) at 5 years. There is no difference in the risk of inappropriate discharges between primary and secondary prevention indications. There is an increased risk for inappropriate therapy in the congenital heart disease population. An increasing number of ICDs are being placed for primary prevention in young patients, a marked shift in practice during the last two decades. The benefits of ICDs remain greater in secondary than in primary-prevention patients. In both groups, approximately 25% of patients received inappropriate discharges within 5 years of implant. Patients with congenital heart disease are the most affected by inappropriate discharges.
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Affiliation(s)
- Nicholas H Von Bergen
- Department of Pediatric Cardiology, Carver College of Medicine, University of Iowa Children's Hospital, University of Iowa, Iowa City, IA, USA.
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25
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Makhoul M, Von Bergen NH, Rabi F, Gingerich J, Evans WN, Law IH. Successful transcatheter cryoablation in infants with drug-resistant supraventricular tachycardia: a case series. J Interv Card Electrophysiol 2010; 29:209-15. [DOI: 10.1007/s10840-009-9456-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/01/2009] [Accepted: 10/25/2009] [Indexed: 10/20/2022]
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26
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Von Bergen NH, Lyon JK, Edens RE. Takotsubo-like cardiomyopathy in a 17-year-old male with a pheochromocytoma. Pediatr Cardiol 2009; 30:184-7. [PMID: 18704553 DOI: 10.1007/s00246-008-9279-z] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/19/2008] [Accepted: 07/07/2008] [Indexed: 10/21/2022]
Abstract
We report a case of a 17-year-old adolescent male with Takotsubo-like cardiomyopathy in the setting of pheochromocytoma who presented with hematemesis, hypertension, and pallor. Takotsubo-like cardiomyopathy is rarely reported in the pediatric population, and this is the first report in the pediatric literature of Takotsubo-like cardiomyopathy associated with both pheochromocytoma and an elongated course of the left anterior descending coronary artery.
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Affiliation(s)
- Nicholas H Von Bergen
- Pediatric Cardiology Department, The University of Iowa Children's Hospital, 200 Hawkins Drive, Iowa City, IA 52240, USA
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27
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Von Bergen NH, Burkhart HM, Latson LA, Emery SP, Younoszai AK, Bartlett HL. Complete cavopulmonary shunt completion after in utero balloon atrial septoplasty for hypoplastic left heart syndrome. J Thorac Cardiovasc Surg 2007; 134:1355-6. [PMID: 17976479 DOI: 10.1016/j.jtcvs.2007.07.033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/09/2007] [Accepted: 07/19/2007] [Indexed: 10/22/2022]
Affiliation(s)
- Nicholas H Von Bergen
- Department of Pediatric Cardiology, the University of Iowa Children's Hospital, Iowa City, Iowa 52242, USA.
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28
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Von Bergen NH, Atkins DL, Gingerich JC, Law IH. “Ratchet” syndrome, another etiology for pacemaker lead dislodgement: A case report. Heart Rhythm 2007; 4:788-9. [PMID: 17556205 DOI: 10.1016/j.hrthm.2006.12.029] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/19/2006] [Accepted: 12/06/2007] [Indexed: 11/22/2022]
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Von Bergen NH, Abu Rasheed H, Law IH. Transcatheter cryoablation with 3-D mapping of an atrial ectopic tachycardia in a pediatric patient with tachycardia induced heart failure. J Interv Card Electrophysiol 2007; 18:273-9. [PMID: 17520358 DOI: 10.1007/s10840-007-9125-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/23/2006] [Accepted: 04/03/2007] [Indexed: 10/23/2022]
Abstract
Atrial ectopic tachycardias (AET) are often resistant to medical management and can lead to a significant reduction in cardiac function. Transcatheter cryoablation, a definitive therapy, to our knowledge has yet to be described in the pediatric population. A three-year-old male presented with AET induced heart failure which persisted despite medical management. Management was complicated by worsening heart failure and propylene glycol intoxication. He underwent transcatheter cryoablation using a 3-D navigation system with an initially successful elimination of the arrhythmia. After a late recurrence (15 months) of the AET he underwent epicardial transcatheter ablation using cryotherapy with successful elimination of the arrhythmia.
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Affiliation(s)
- Nicholas H Von Bergen
- The Children's Hospital of Iowa, University of Iowa Hospitals and Clinics, Iowa City, IA 52242-1083, USA
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Law IH, Von Bergen NH, Gingerich JC, Saarel EV, Fischbach PS, Dick M. Transcatheter cryothermal ablation of junctional ectopic tachycardia in the normal heart. Heart Rhythm 2006; 3:903-7. [PMID: 16876738 DOI: 10.1016/j.hrthm.2006.04.026] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/11/2006] [Accepted: 04/26/2006] [Indexed: 12/01/2022]
Abstract
BACKGROUND Junctional ectopic tachycardia in the normal heart is rare and often is resistant to pharmacologic management. Transcatheter ablation using radiofrequency energy places the AV node at risk. OBJECTIVES The purpose of this study was to report our experience with transcatheter cryothermal ablation using three-dimensional mapping in six patients with junctional ectopic tachycardia. METHODS A review of clinical and electrophysiologic data was performed on all patients with structurally normal hearts who underwent cryothermal ablation for treatment of junctional ectopic tachycardia at two institutions. RESULTS Six patients (age 7.7-36.5 years) underwent attempted transcatheter cryothermal ablation using three-dimensional mapping. Only one patient had achieved arrhythmia suppression on medical management. Cryothermal mapping (-30 degrees C) localized the junctional focus while normal conduction was monitored. The junctional focus was high in the triangle of Koch in four patients and was low in one patient. The sixth patient had only one run of junctional ectopic tachycardia during the procedure and therefore received an empiric cryoablation (-70 degrees C) lesion. Subsequent cryoablation lesions were delivered at and around the junctional focus. In one patient, cryomapping eliminated the junctional focus but resulted in transient complete AV block; therefore, cryoablation was not performed. All patients who received the cryoablation lesions had elimination of their junctional ectopic tachycardia at 6-week follow-up. The patient who did not receive a cryoablation lesion remained in a slower junctional rhythm at follow-up. CONCLUSION Cryoablation of junctional ectopic tachycardia is safe and effective. Nonetheless, proximity to the His-Purkinje system may preclude success. Empiric cryoablation can be effective; cryotherapy may not yield immediate success, but a delayed salutary effect can follow.
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Affiliation(s)
- Ian H Law
- Children's Hospital of Iowa, University of Iowa Hospitals and Clinics, Iowa City, 55242-1083, USA.
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Abstract
BACKGROUND Excitatory amino acid receptors are important for both sensory and motor function in the spinal cord. We studied the effects of intrathecal LY293558, a competitive non-N-methyl-D-aspartate excitatory amino acid receptor antagonist, on motor and sensory function in rats to determine whether drugs blocking these receptors could potentially be used as alternative agents to local anesthetics for spinal anesthesia. METHODS Rats were tested before and 15-240 min after intrathecal injection of 5 nmol (in 10 microl) LY293558. Sensory function was tested at the hind paw using withdrawal response to pin prick and withdrawal to pinch with sharp forceps. Motor performance (ambulation, placing reflex, and Rotorod time), blood pressure, and heart rate were also evaluated. Some tests were repeated the next day. Responses after LY293558 were compared to injection of 40 microl bupivacaine, 0.75%. Pin-prick responses at the forepaw, chest, abdomen, hind leg, and hind paw were also examined after intrathecal LY293558. RESULTS Intrathecal LY293558 blocked both sensory and motor responses through 180 min; complete recovery was present the following day. No change in blood pressure or heart rate occurred. The effects of LY293558 were more pronounced and sustained than those of bupivacaine. Segmental blockade of the response to pin prick was present after LY293558. CONCLUSION Drugs like LY293558 that block alpha-amino-3-hydroxy-5-methyl-4-isoxazole-propionic acid (AMPA)/kainate receptors may be an alternative to local anesthetics for spinal anesthesia in humans.
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Affiliation(s)
- Nicholas H Von Bergen
- Department of Anesthesia, College of Medicine, University of Iowa, Iowa City, Iowa 52242-1079, USA
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