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Shanafelt C, Middour TG, Ibrahim R, Leal M, Lloyd MS, Shah AD, Westerman SB, El-Chami MF, Merchant FM, Bhatia NK. Outcomes of tricuspid regurgitation after lead extraction. J Cardiovasc Electrophysiol 2024; 35:929-938. [PMID: 38450808 DOI: 10.1111/jce.16227] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Revised: 02/04/2024] [Accepted: 02/14/2024] [Indexed: 03/08/2024]
Abstract
INTRODUCTION Transvenous leads have been implicated in tricuspid valve (TV) dysfunction, but limited data are available regarding the effect of extracting leads across the TV on valve regurgitation. The aim of this study is to quantify tricuspid regurgitation (TR) before and after lead extraction and identify predictors of worsening TR. METHODS We studied 321 patients who had echocardiographic data before and after lead extraction. TR was graded on a scale (0 = none/trivial, 1 = mild, 2 = moderate, 3 = severe). A change of >1 grade following extraction was considered significant. RESULTS A total of 321 patients underwent extraction of a total of 338 leads across the TV (1.05 ± 0.31 leads across the TV per patient). There was no significant difference on average TR grade pre- and postextraction (1.18 ± 0.91 vs. 1.15 ± 0.87; p = 0.79). TR severity increased after extraction in 84 patients, but was classified as significantly worse (i.e., >1 grade change in severity) in only 8 patients (2.5%). Use of laser lead extraction was associated with a higher rate of worsening TR postextraction (44.0% vs. 31.6%, p = 0.04). CONCLUSION In our single-center analysis, extraction of leads across the TV did not significantly affect the extent of TR in most patients. Laser lead extraction was associated with a higher rate of worsening TR after extraction.
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Affiliation(s)
- Colby Shanafelt
- Department of Cardiovascular Medicine, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Thomas G Middour
- Department of Cardiovascular Medicine, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Rand Ibrahim
- Department of Cardiovascular Medicine, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Miguel Leal
- Department of Cardiovascular Medicine, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Michael S Lloyd
- Department of Cardiovascular Medicine, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Anand D Shah
- Department of Cardiovascular Medicine, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Stacy B Westerman
- Department of Cardiovascular Medicine, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Mikhael F El-Chami
- Department of Cardiovascular Medicine, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Faisal M Merchant
- Department of Cardiovascular Medicine, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Neal K Bhatia
- Department of Cardiovascular Medicine, Emory University School of Medicine, Atlanta, Georgia, USA
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Huang J, Bhatia NK, Lloyd MS, Westerman S, Shah A, Delurgio D, Patel AM, Tompkins C, El-Chami MF, Merchant FM. Impact of omitting the intravenous heparin bolus on outcomes of leadless pacemaker implantation. J Cardiovasc Electrophysiol 2024. [PMID: 38650520 DOI: 10.1111/jce.16284] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/19/2024] [Revised: 04/02/2024] [Accepted: 04/08/2024] [Indexed: 04/25/2024]
Abstract
BACKGROUND Early guidance recommended a bolus of intravenous heparin at the beginning of leadless pacemaker (LP) implantation procedures. However, due to concern about bleeding complications, more recent practice has tended toward omitting the bolus and only running a continuous heparin infusion through the introducer sheath. The impact of omitting the heparin bolus on procedural outcomes is not clear. METHODS We reviewed all Medtronic Micra LP implants at our institution from 9/2014 to 9/2022. The decision to bolus with heparin was at operator discretion. RESULTS Among 621 LP implants, 326 received an intravenous heparin bolus, 243 did not, and 52 patients were excluded because heparin bolus status could not be confirmed. There was a trend toward more frequent omission of the heparin bolus with more recent implants. Median follow-up after LP implant was 14.3 (interquartile range [IQR]: 8.4-27.9) months. There was no difference between heparin bolus and no bolus groups in the number of device deployments/recaptures (1.42 ± 0.81 vs. 1.31 ± 0.66, p = .15). Implant-related adverse events were also similar between heparin bolus and no bolus groups: access-site hematoma requiring intervention (7 vs. 5, p = .99), pseudoaneurysm (1 vs. 1, p = .99), cardiac perforation (1 vs. 1, p = .99), intraprocedural device thrombus formation (2 vs. 4, p = .41), 30-day rehospitalization (21 vs. 15, p = .98), and 30-day all-cause mortality (16 vs. 14, p = .70). There was one additional nonfatal cardiac perforation in a patient who was excluded due to unknown heparin bolus status. Regarding device electrical parameters between heparin bolus and no bolus groups, there were no significant differences at the time of implant: pacing capture threshold 0.5 ± 0.4 vs. 0.5 ± 0.3, p = .10; pacing impedance 739.9 ± 226.4 vs. 719.1 ± 215.4, p = .52; R wave sensing 11.7 ± 5.7 vs. 12.0 ± 5.4, p = .34). Long-term device performance was also similar between groups. CONCLUSION Omission of the systemic heparin bolus at the time of LP implantation appears safe in appropriately selected patients. Heparin bolus may still be considered in long cases requiring multiple device deployments or in patients at high risk for thrombotic complications.
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Affiliation(s)
- Jingwen Huang
- Department of Medicine, Division of Cardiology, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Neal K Bhatia
- Department of Medicine, Division of Cardiology, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Michael S Lloyd
- Department of Medicine, Division of Cardiology, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Stacy Westerman
- Department of Medicine, Division of Cardiology, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Anand Shah
- Department of Medicine, Division of Cardiology, Emory University School of Medicine, Atlanta, Georgia, USA
| | - David Delurgio
- Department of Medicine, Division of Cardiology, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Anshul M Patel
- Department of Medicine, Division of Cardiology, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Christine Tompkins
- Department of Medicine, Division of Cardiology, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Mikhael F El-Chami
- Department of Medicine, Division of Cardiology, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Faisal M Merchant
- Department of Medicine, Division of Cardiology, Emory University School of Medicine, Atlanta, Georgia, USA
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Lloyd MS, Pelling M, Ibrahim R, El-Chami MF, Iravanian S. Accurate detection of lead malfunction from ECG-derived bipolar pacing stimulus amplitude. Heart Rhythm 2024:S1547-5271(24)02309-9. [PMID: 38574791 DOI: 10.1016/j.hrthm.2024.03.1814] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2024] [Revised: 03/21/2024] [Accepted: 03/29/2024] [Indexed: 04/06/2024]
Abstract
BACKGROUND One common mode of lead failure is insulation breach, which may result in myopotential noise and device malfunction. "Pseudo-unipolarization" of bipolar pacing stimuli, as observed from a routine 12-lead electrocardiogram (ECG) due to stimulus current leak, has been observed with insulation breaches. OBJECTIVE We sought to characterize this electrocardiographic finding to detect this type of lead malfunction. METHODS A total of 138 transvenous leads were analyzed, including 88 with known malfunction and 50 normal leads. The amplitude of a bipolar pacing stimulus on the ECG was recorded and compared with a control data set of newly implanted leads with bipolar stimuli normalized for output. RESULTS The malfunction group consisted of 61% right atrium and 39% right ventricle leads with mean pacing output of 2.74 V at 0.5 ms. There was a significant difference in ECG bipolar stimulus amplitudes at time of identification of failure (7.89 ± 7.56 mm/V; P < .001) compared with those of normal leads (0.86 ± 0.41 mm/V). Receiver operating characteristic curve for the prediction of lead malfunction based on absolute ECG amplitude displayed an area under the curve of 0.93 (95% CI, 0.891-0.969). When normalized for programmed stimulus output, a cutoff of 5 mm/V demonstrated a sensitivity of 91% and a specificity of 92% (area under the curve, 0.967; 95% CI, 0.938-0.996). CONCLUSION The maximum amplitude of a bipolar pacing stimulus on the ECG is significantly lower in normal functioning leads compared with those with known malfunction. This simply derived variable demonstrated good accuracy at identifying lead failure due to insulation breach.
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Affiliation(s)
- Michael S Lloyd
- Section of Clinical Cardiac Electrophysiology, Emory University, Atlanta, Georgia.
| | - Mary Pelling
- Emory University School of Medicine, Atlanta, Georgia
| | - Rand Ibrahim
- Section of Clinical Cardiac Electrophysiology, Emory University, Atlanta, Georgia
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Ramdat Misier NL, Moore JP, Nguyen HH, Lloyd MS, Dubin AM, Mah DY, Czosek RJ, Khairy P, Chang PM, Nielsen JC, Aydin A, Pilcher TA, O'Leary ET, Shivkumar K, de Groot NMS. Long-Term Outcomes of Cardiac Resynchronization Therapy in Patients With Repaired Tetralogy of Fallot: A Multicenter Study. Circ Arrhythm Electrophysiol 2024; 17:e012363. [PMID: 38344811 DOI: 10.1161/circep.123.012363] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Accepted: 01/17/2024] [Indexed: 03/21/2024]
Abstract
BACKGROUND A growing number of patients with tetralogy of Fallot develop left ventricular systolic dysfunction and heart failure, in addition to right ventricular dysfunction. Although cardiac resynchronization therapy (CRT) is an established treatment option, the effect of CRT in this population is still not well defined. This study aimed to investigate the early and late efficacy, survival, and safety of CRT in patients with tetralogy of Fallot. METHODS Data were analyzed from an observational, retrospective, multicenter cohort, initiated jointly by the Pediatric and Congenital Electrophysiology Society and the International Society of Adult Congenital Heart Disease. Twelve centers contributed baseline and longitudinal data, including vital status, left ventricular ejection fraction (LVEF), QRS duration, and NYHA functional class. Outcomes were analyzed at early (3 months), intermediate (1 year), and late follow-up (≥2 years) after CRT implantation. RESULTS A total of 44 patients (40.3±19.2 years) with tetralogy of Fallot and CRT were enrolled. Twenty-nine (65.9%) patients had right ventricular pacing before CRT upgrade. The left ventricular ejection fraction improved from 32% [24%-44%] at baseline to 42% [32%-50%] at early follow-up (P<0.001) and remained improved from baseline thereafter (P≤0.002). The QRS duration decreased from 180 [160-205] ms at baseline to 152 [133-182] ms at early follow-up (P<0.001) and remained decreased at intermediate and late follow-up (P≤0.001). Patients with upgraded CRT had consistent improvement in left ventricular ejection fraction and QRS duration at each time point (P≤0.004). Patients had a significantly improved New York Heart Association functional class after CRT implantation at each time point compared with baseline (P≤0.002). The transplant-free survival rates at 3, 5, and 8 years after CRT implantation were 85%, 79%, and 73%. CONCLUSIONS In patients with tetralogy of Fallot treated with CRT consistent improvement in QRS duration, left ventricular ejection fraction, New York Heart Association functional class, and reasonable long-term survival were observed. The findings from this multicenter study support the consideration of CRT in this unique population.
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Affiliation(s)
- Nawin L Ramdat Misier
- Department of Cardiology, Erasmus Medical Center, Rotterdam , The Netherlands (N.L.R.M., N.M.S.d.G.)
| | - Jeremy P Moore
- Ahmanson/University of California Los Angeles Adult Congenital Heart Disease Center, Los Angeles, CA (J.P.M., K.S.)
| | - Hoang H Nguyen
- Department of Pediatrics, University of Texas Southwestern Medical Center, Dallas, TX (H.H.N.)
| | - Michael S Lloyd
- Division of Cardiology, Department of Medicine, Emory University School of Medicine, Atlanta, GA (M.S.L.)
| | - Anne M Dubin
- Division of Pediatric Cardiology, Department of Pediatrics, Stanford University School of Medicine, Palo Alto CA (A.M.D.)
| | - Douglas Y Mah
- Department of Cardiology, Boston Children's Hospital and Harvard Medical School, Boston MA (D.Y.M., E.T.O.)
| | - Richard J Czosek
- Division of Pediatric Cardiology, Department of Pediatrics, The Heart Institute at Cincinnati Children's Hospital Medical Center, Cincinnati OH (R.J.C.)
| | - Paul Khairy
- Electrophysiology Service and Adult Congenital Heart Center, Montreal Heart Institute, Université de Montréal, Montreal Quebec, Canada (P.K.)
| | - Philip M Chang
- Congenital Heart Center, University of Florida Health, Gainesville, FL (P.M.C.)
| | - Jens C Nielsen
- Department of Clinical Medicine, Aarhus University, Aarhus Denmark (J.C.N.)
- Department of Cardiology, Aarhus University Hospital, Aarhus Denmark (J.C.N.)
| | - Alper Aydin
- Division of Cardiology, University of Ottawa Heart Institute, Ottawa, Ontario Canada (A.A.)
| | - Thomas A Pilcher
- Division of Pediatric Cardiology, Department of Internal Medicine, University of Utah, Salt Lake City UT (T.A.P.)
| | - Edward T O'Leary
- Department of Cardiology, Boston Children's Hospital and Harvard Medical School, Boston MA (D.Y.M., E.T.O.)
| | - Kalyanam Shivkumar
- Ahmanson/University of California Los Angeles Adult Congenital Heart Disease Center, Los Angeles, CA (J.P.M., K.S.)
| | - Natasja M S de Groot
- Department of Cardiology, Erasmus Medical Center, Rotterdam , The Netherlands (N.L.R.M., N.M.S.d.G.)
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Lloyd MS, Tomashitis BM, Garcia M. Percutaneous Transpericardial Permanent Pacing in a Woman With Fontan Circulation. JACC Clin Electrophysiol 2024:S2405-500X(24)00101-4. [PMID: 38520438 DOI: 10.1016/j.jacep.2024.02.004] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2023] [Revised: 01/31/2024] [Accepted: 02/01/2024] [Indexed: 03/25/2024]
Affiliation(s)
- Michael S Lloyd
- Section of Clinical Cardiac Electrophysiology, Emory University, Atlanta, Georgia, USA.
| | - Brett M Tomashitis
- Section of Clinical Cardiac Electrophysiology, Emory University, Atlanta, Georgia, USA
| | - Mariana Garcia
- Section of Cardiovascular Imaging, Emory University, Atlanta, Georgia, USA
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Gupta S, Kolluri R, Simoes T, Pingle SC, Nie H, Lloyd MS, Steinhaus D, Westerman SB, Shah A, Kline J, Kiani S. Safety of multi-access site venous closure following catheter ablation of atrial fibrillation and flutter. J Interv Card Electrophysiol 2024:10.1007/s10840-024-01773-3. [PMID: 38413483 DOI: 10.1007/s10840-024-01773-3] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/27/2024] [Accepted: 02/12/2024] [Indexed: 02/29/2024]
Abstract
BACKGROUND Following catheter ablation, vascular access management involves potential complications and prolonged recovery. Recently, suture-mediated closure (SMC) devices were approved for venous access procedures. The objective of this study is to evaluate the safety of a commercially available SMC for multiple access site venous closure by duplex ultrasound (DUS) in asymptomatic subjects with non-visible complications. METHODS Thirty-six subjects (63 ± 10.7 years old, 12 female) were enrolled. Following catheter ablation for atrial fibrillation, all subjects had SMC of every venous access site. Subjects underwent DUS of femoral veins and arteries. DUS was performed at discharge, and again at 30 days. Subjects were evaluated for clinically apparent vascular complications. RESULTS Mean procedure duration was 138.6 min, and the time to hemostasis was 3.1 min/access site and 9.5 min/subject. Median time to ambulation was 193.5 min, and median time to discharge was 5.95 h, with discharge as early as 2.4 h. A median of 2 sheaths/vein and a median of 2 SMC devices/vein were used. There were no major complications and a 16.7% (6/36) minor complication rate at discharge. All complications resolved at 30 days. The complication rate was not higher in patients with 2 SMC per access site as compared to the patients who just received 1 SMC per access site. CONCLUSIONS This study demonstrates the safety of multi-access closure using SMC, following catheter ablation procedures, for closure of sites that use sheath sizes from ≤ 8F to ≥ 15F and for those that use 2 or more SMCs per access site.
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Affiliation(s)
- Sanjaya Gupta
- Division of Cardiology, Saint Luke's Mid-America Heart Institute, 9th Floor, Cardiovascular Research, Kansas City, MO, 64111, USA.
- University of Missouri Kansas City School of Medicine, Kansas City, MO, USA.
| | | | | | | | - Hong Nie
- Abbott Vascular, Santa Clara, CA, USA
| | | | - Daniel Steinhaus
- Division of Cardiology, Saint Luke's Mid-America Heart Institute, 9th Floor, Cardiovascular Research, Kansas City, MO, 64111, USA
- University of Missouri Kansas City School of Medicine, Kansas City, MO, USA
| | | | - Anand Shah
- Division of Cardiology, Emory University, Atlanta, GA, USA
| | - Jessica Kline
- Division of Cardiology, Saint Luke's Mid-America Heart Institute, 9th Floor, Cardiovascular Research, Kansas City, MO, 64111, USA
- University of Missouri Kansas City School of Medicine, Kansas City, MO, USA
| | - Soroosh Kiani
- Division of Cardiology, Emory University, Atlanta, GA, USA
- Division of Cardiovascular Medicine, UMass Chan Medical School, Worcester, MA, USA
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Benali K, Lloyd MS, Petrosyan A, Rigal L, Quivrin M, Bessieres I, Vlachos K, Hammache N, Bellec J, Simon A, Laurent G, Higgins K, Garnier F, de Crevoisier R, Martins R, Da Costa A, Guenancia C. Cardiac stereotactic radiation therapy for refractory ventricular arrhythmias in patients with left ventricular assist devices. J Cardiovasc Electrophysiol 2024; 35:206-213. [PMID: 38018417 DOI: 10.1111/jce.16139] [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] [Received: 10/11/2023] [Revised: 11/06/2023] [Accepted: 11/10/2023] [Indexed: 11/30/2023]
Abstract
Left ventricular assist device (LVAD) implantation is an established treatment for patients with advanced heart failure refractory to medical therapy. However, the incidence of ventricular arrhythmias (VAs) is high in this population, both in the acute and delayed phases after implantation. About one-third of patients implanted with an LVAD will experience sustained VAs, predisposing these patients to worse outcomes and complicating patient management. The combination of pre-existing myocardial substrate and complex electrical remodeling after LVAD implantation account for the high incidence of VAs observed in this population. LVAD patients presenting VAs refractory to antiarrhythmic therapy and catheter ablation procedures are not rare. In such patients, treatment options are extremely limited. Stereotactic body radiation therapy (SBRT) is a technique that delivers precise and high doses of radiation to highly defined targets, reducing exposure to adjacent normal tissue. Cardiac SBRT has recently emerged as a promising alternative with a growing number of case series reporting the effectiveness of the technique in reducing the VA burden in patients with arrhythmias refractory to conventional therapies. The safety profile of cardiac SBRT also appears favorable, even though the current clinical experience remains limited. The use of cardiac SBRT for the treatment of refractory VAs in patients implanted with an LVAD are even more scarce. This review summarizes the clinical experience of cardiac SBRT in LVAD patients and describes technical considerations related to the implementation of the SBRT procedure in the presence of an LVAD.
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Affiliation(s)
- Karim Benali
- Department of Cardiac Electrophysiology, Saint-Etienne University Hospital Center, Saint-Etienne, France
- Department of Signal Analysis, IHU LIRYC, Electrophysiology and Heart Modelling Institute, Bordeaux University, Bordeaux, France
- LTSI-UMR 1099, Rennes, France
| | - Michael S Lloyd
- Department of Cardiology, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Andranik Petrosyan
- Department of Cardiac Surgery, Saint-Etienne University Hospital Center, Saint-Etienne, France
| | - Louis Rigal
- Department of Signal Analysis, IHU LIRYC, Electrophysiology and Heart Modelling Institute, Bordeaux University, Bordeaux, France
| | - Magali Quivrin
- Department of Radiation Oncology, Centre Georges Francois Leclerc, Dijon, France
| | - Igor Bessieres
- Department of Radiation Oncology, Centre Georges Francois Leclerc, Dijon, France
| | | | - Nefissa Hammache
- Department of Cardiac Electrophysiology, Nancy University Hospital Center, Nancy, France
| | - Julien Bellec
- Department of Radiation Oncology, Centre Eugene Marquis, Rennes, France
| | - Antoine Simon
- Department of Signal Analysis, IHU LIRYC, Electrophysiology and Heart Modelling Institute, Bordeaux University, Bordeaux, France
| | - Gabriel Laurent
- Department of Cardiac Electrophysiology, Dijon University Hospital Center, Dijon, France
| | - Kristin Higgins
- Department of Radiation Oncology, Emory University, Atlanta, Georgia, USA
| | - Fabien Garnier
- Department of Cardiac Electrophysiology, Dijon University Hospital Center, Dijon, France
| | | | - Raphaël Martins
- Department of Signal Analysis, IHU LIRYC, Electrophysiology and Heart Modelling Institute, Bordeaux University, Bordeaux, France
- Department of Cardiac Electrophysiology, Rennes University Hospital Center, Rennes, France
| | - Antoine Da Costa
- Department of Cardiac Electrophysiology, Saint-Etienne University Hospital Center, Saint-Etienne, France
| | - Charles Guenancia
- Department of Radiation Oncology, Centre Eugene Marquis, Rennes, France
- PEC 2 EA 7460, University of Burgundy and Franche-Comté, Dijon, France
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Huang J, Bhatia NK, Lloyd MS, Westerman S, Shah A, Leal M, Delurgio D, Patel AM, Tompkins C, Leon AR, El-Chami MF, Merchant FM. Gender Differences With Leadless Pacemakers: Periprocedural Complications, Long-Term Device Function, and Clinical Outcomes. Am J Cardiol 2024; 210:229-231. [PMID: 37890565 DOI: 10.1016/j.amjcard.2023.10.048] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/04/2023] [Revised: 10/07/2023] [Accepted: 10/13/2023] [Indexed: 10/29/2023]
Affiliation(s)
- Jingwen Huang
- Department of Medicine, Emory University School of Medicine, Atlanta, Georgia
| | - Neal K Bhatia
- Department of Medicine, Emory University School of Medicine, Atlanta, Georgia; Division of Cardiology, Department of Medicine, Emory University School of Medicine, Atlanta, Georgia
| | - Michael S Lloyd
- Department of Medicine, Emory University School of Medicine, Atlanta, Georgia; Division of Cardiology, Department of Medicine, Emory University School of Medicine, Atlanta, Georgia
| | - Stacy Westerman
- Department of Medicine, Emory University School of Medicine, Atlanta, Georgia; Division of Cardiology, Department of Medicine, Emory University School of Medicine, Atlanta, Georgia
| | - Anand Shah
- Department of Medicine, Emory University School of Medicine, Atlanta, Georgia; Division of Cardiology, Department of Medicine, Emory University School of Medicine, Atlanta, Georgia
| | - Miguel Leal
- Department of Medicine, Emory University School of Medicine, Atlanta, Georgia; Division of Cardiology, Department of Medicine, Emory University School of Medicine, Atlanta, Georgia
| | - David Delurgio
- Department of Medicine, Emory University School of Medicine, Atlanta, Georgia; Division of Cardiology, Department of Medicine, Emory University School of Medicine, Atlanta, Georgia
| | - Anshul M Patel
- Department of Medicine, Emory University School of Medicine, Atlanta, Georgia; Division of Cardiology, Department of Medicine, Emory University School of Medicine, Atlanta, Georgia
| | - Christine Tompkins
- Department of Medicine, Emory University School of Medicine, Atlanta, Georgia; Division of Cardiology, Department of Medicine, Emory University School of Medicine, Atlanta, Georgia
| | - Angel R Leon
- Department of Medicine, Emory University School of Medicine, Atlanta, Georgia; Division of Cardiology, Department of Medicine, Emory University School of Medicine, Atlanta, Georgia
| | - Mikhael F El-Chami
- Department of Medicine, Emory University School of Medicine, Atlanta, Georgia; Division of Cardiology, Department of Medicine, Emory University School of Medicine, Atlanta, Georgia
| | - Faisal M Merchant
- Department of Medicine, Emory University School of Medicine, Atlanta, Georgia; Division of Cardiology, Department of Medicine, Emory University School of Medicine, Atlanta, Georgia.
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9
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Iravanian S, Uzelac I, Shah AD, Toye MJ, Lloyd MS, Burke MA, Daneshmand MA, Attia TS, Vega JD, El-Chami MF, Merchant FM, Cherry EM, Bhatia NK, Fenton FH. Complex repolarization dynamics in ex vivo human ventricles are independent of the restitution properties. Europace 2023; 25:euad350. [PMID: 38006390 PMCID: PMC10751849 DOI: 10.1093/europace/euad350] [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] [Subscribe] [Scholar Register] [Received: 09/10/2023] [Accepted: 11/13/2023] [Indexed: 11/27/2023] Open
Abstract
AIMS The mechanisms of transition from regular rhythms to ventricular fibrillation (VF) are poorly understood. The concordant to discordant repolarization alternans pathway is extensively studied; however, despite its theoretical centrality, cannot guide ablation. We hypothesize that complex repolarization dynamics, i.e. oscillations in the repolarization phase of action potentials with periods over two of classic alternans, is a marker of electrically unstable substrate, and ablation of these areas has a stabilizing effect and may reduce the risk of VF. To prove the existence of higher-order periodicities in human hearts. METHODS AND RESULTS We performed optical mapping of explanted human hearts obtained from recipients of heart transplantation at the time of surgery. Signals recorded from the right ventricle endocardial surface were processed to detect global and local repolarization dynamics during rapid pacing. A statistically significant global 1:4 peak was seen in three of six hearts. Local (pixel-wise) analysis revealed the spatially heterogeneous distribution of Periods 4, 6, and 8, with the regional presence of periods greater than two in all the hearts. There was no significant correlation between the underlying restitution properties and the period of each pixel. CONCLUSION We present evidence of complex higher-order periodicities and the co-existence of such regions with stable non-chaotic areas in ex vivo human hearts. We infer that the oscillation of the calcium cycling machinery is the primary mechanism of higher-order dynamics. These higher-order regions may act as niduses of instability and may provide targets for substrate-based ablation of VF.
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Affiliation(s)
- Shahriar Iravanian
- Department of Medicine, Division of Cardiology, Emory University School of Medicine, 1364 Clifton Road, Atlanta, GA 30322, USA
| | - Ilija Uzelac
- Georgia Institute of Technology, Department of Physics, 837 State St NW, Atlanta, GA 30332, USA
| | - Anand D Shah
- Department of Medicine, Division of Cardiology, Emory University School of Medicine, 1364 Clifton Road, Atlanta, GA 30322, USA
| | - Mikael J Toye
- Georgia Institute of Technology, Department of Physics, 837 State St NW, Atlanta, GA 30332, USA
| | - Michael S Lloyd
- Department of Medicine, Division of Cardiology, Emory University School of Medicine, 1364 Clifton Road, Atlanta, GA 30322, USA
| | - Michael A Burke
- Department of Medicine, Division of Cardiology, Emory University School of Medicine, 1364 Clifton Road, Atlanta, GA 30322, USA
| | - Mani A Daneshmand
- Department of Surgery, Division of Cardiovascular Surgery, Emory University School of Medicine, 1364 Clifton Road, Atlanta, GA 30322, USA
| | - Tamer S Attia
- Department of Surgery, Division of Cardiovascular Surgery, Emory University School of Medicine, 1364 Clifton Road, Atlanta, GA 30322, USA
| | - John David Vega
- Department of Surgery, Division of Cardiovascular Surgery, Emory University School of Medicine, 1364 Clifton Road, Atlanta, GA 30322, USA
| | - Mikhael F El-Chami
- Department of Medicine, Division of Cardiology, Emory University School of Medicine, 1364 Clifton Road, Atlanta, GA 30322, USA
| | - Faisal M Merchant
- Department of Medicine, Division of Cardiology, Emory University School of Medicine, 1364 Clifton Road, Atlanta, GA 30322, USA
| | - Elizabeth M Cherry
- Georgia Institute of Technology, Department of Physics, 837 State St NW, Atlanta, GA 30332, USA
| | - Neal K Bhatia
- Department of Medicine, Division of Cardiology, Emory University School of Medicine, 1364 Clifton Road, Atlanta, GA 30322, USA
| | - Flavio H Fenton
- Georgia Institute of Technology, Department of Physics, 837 State St NW, Atlanta, GA 30332, USA
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10
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Ibrahim R, Al-Gibbawi M, Mekary W, Bhatia NK, Kiani S, Westerman SB, Shah AD, Lloyd MS, Leal M, De Lurgio DB, Patel AM, Tompkins C, Leon AR, Merchant FM, El-Chami MF. Long-term performance of single-connector (DF4) implantable defibrillator leads. Europace 2023; 25:euad347. [PMID: 38000900 PMCID: PMC10751803 DOI: 10.1093/europace/euad347] [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] [Received: 10/16/2023] [Accepted: 11/13/2023] [Indexed: 11/26/2023] Open
Abstract
AIMS Single-connector (DF4) defibrillator leads have become the predominantly implanted transvenous implantable cardioverter-defibrillator lead. However, data on their long-term performance are derived predominantly from manufacturer product performance reports. METHODS AND RESULTS We reviewed medical records in 5289 patients with DF4 leads between 2011 and 2023 to determine the frequency of lead-related abnormalities. We defined malfunction as any single or combination of electrical abnormalities requiring revision including a sudden increase (≥2×) in stimulation threshold, a discrete jump in high-voltage impedance, or sensing of non-physiologic intervals or noise. We documented time to failure, predictors of failure, and management strategies. Mean follow-up after implant was 4.15 ± 3.6 years (median = 3.63), with 37% of leads followed for >5 years. A total of 80 (1.5%) leads demonstrated electrical abnormalities requiring revision with an average time to failure of 4 ± 2.8 years (median = 3.5). Of the leads that malfunctioned, 62/80 (78%) were extracted and replaced with a new lead and in the other 18 cases, malfunctioned DF4 leads were abandoned, and a new lead implanted. In multivariable models, younger age at implant (OR 1.03 per year; P < 0.001) and the presence of Abbott/St. Jude leads increased the risk of malfunction. CONCLUSION DF4 defibrillator leads demonstrate excellent longevity with >98.3% of leads followed for at least 5 years still functioning normally. Younger age at implant and lead manufacturer are associated with an increased risk of DF4 lead malfunction. The differences in lead survival between manufacturers require further investigation.
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Affiliation(s)
- Rand Ibrahim
- Division of Cardiology, Section of Electrophysiology, Emory University School of Medicine, 550 Peachtree Street NE, 30308 Atlanta, GA, USA
| | - Mounir Al-Gibbawi
- Division of Cardiology, Section of Electrophysiology, Emory University School of Medicine, 550 Peachtree Street NE, 30308 Atlanta, GA, USA
| | - Wissam Mekary
- Division of Cardiology, Section of Electrophysiology, Emory University School of Medicine, 550 Peachtree Street NE, 30308 Atlanta, GA, USA
| | - Neal Kumar Bhatia
- Division of Cardiology, Section of Electrophysiology, Emory University School of Medicine, 550 Peachtree Street NE, 30308 Atlanta, GA, USA
| | - Soroosh Kiani
- Division of Cardiology, Section of Electrophysiology, Emory University School of Medicine, 550 Peachtree Street NE, 30308 Atlanta, GA, USA
| | - Stacy B Westerman
- Division of Cardiology, Section of Electrophysiology, Emory University School of Medicine, 550 Peachtree Street NE, 30308 Atlanta, GA, USA
| | - Anand D Shah
- Division of Cardiology, Section of Electrophysiology, Emory University School of Medicine, 550 Peachtree Street NE, 30308 Atlanta, GA, USA
| | - Michael S Lloyd
- Division of Cardiology, Section of Electrophysiology, Emory University School of Medicine, 550 Peachtree Street NE, 30308 Atlanta, GA, USA
| | - Miguel Leal
- Division of Cardiology, Section of Electrophysiology, Emory University School of Medicine, 550 Peachtree Street NE, 30308 Atlanta, GA, USA
| | - David B De Lurgio
- Division of Cardiology, Section of Electrophysiology, Emory University School of Medicine, 550 Peachtree Street NE, 30308 Atlanta, GA, USA
| | - Anshul M Patel
- Division of Cardiology, Section of Electrophysiology, Emory University School of Medicine, 550 Peachtree Street NE, 30308 Atlanta, GA, USA
| | - Christine Tompkins
- Division of Cardiology, Section of Electrophysiology, Emory University School of Medicine, 550 Peachtree Street NE, 30308 Atlanta, GA, USA
| | - Angel R Leon
- Division of Cardiology, Section of Electrophysiology, Emory University School of Medicine, 550 Peachtree Street NE, 30308 Atlanta, GA, USA
| | - Faisal M Merchant
- Division of Cardiology, Section of Electrophysiology, Emory University School of Medicine, 550 Peachtree Street NE, 30308 Atlanta, GA, USA
| | - Mikhael F El-Chami
- Division of Cardiology, Section of Electrophysiology, Emory University School of Medicine, 550 Peachtree Street NE, 30308 Atlanta, GA, USA
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11
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Dagher L, Tfaily MA, Vavuranakis M, Bhatia NK, Westerman SB, Shah AD, Lloyd MS, Leal M, De Lurgio DB, Merchant A, Panagopoulos A, Patel AM, Tompkins C, Leon AR, Merchant FM, El-Chami MF. Safety of same-day discharge after lead extraction procedures. Heart Rhythm 2023; 20:1669-1673. [PMID: 37591366 DOI: 10.1016/j.hrthm.2023.08.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/16/2023] [Revised: 08/08/2023] [Accepted: 08/09/2023] [Indexed: 08/19/2023]
Abstract
BACKGROUND Same-day discharge (SDD) after cardiovascular procedures is rapidly gaining ground. OBJECTIVE We sought to evaluate the safety of SDD after transvenous lead extraction (TLE). METHODS We performed a retrospective chart review of patients who underwent elective TLE between January 2020 and October 2021 at our institution. The primary outcome was SDD, and major procedural complications and readmissions within 30 days of the procedure were secondary outcomes. RESULTS In this analysis of 111 patients who underwent elective TLE, 80 patients (72%) were discharged on the same day (SDD group) while 31 patients (28%) stayed overnight (overnight group). Lead malfunction was the most common indication for TLE in both groups. Patients in the overnight group were more likely to have a lead dwell time of ≤10 years than those in the SDD group (38.7% vs 20% of all leads in each group; P = .042), have laser sheaths used for extraction and a higher number of leads extracted. No major complications were reported in both groups. In a multivariate analysis, lower body mass index and the use of laser sheath during TLE were predictors of overnight stay. Patients who underwent a procedure using advanced extraction techniques were 3.5 times more likely to stay overnight (95% confidence interval 1.27-9.78; P = .016). CONCLUSION In appropriately selected patients undergoing elective lead extraction, SDD is feasible and safe. Higher body mass index, fewer extracted leads, shorter lead dwell times (<10 years), and less frequent use of laser-powered extraction sheaths were associated with an increased likelihood of SDD.
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Affiliation(s)
- Lilas Dagher
- Division of Cardiology, Section of Electrophysiology, Emory University School of Medicine, Atlanta, Georgia
| | - Mohamad Ali Tfaily
- Division of Cardiology, Section of Electrophysiology, Emory University School of Medicine, Atlanta, Georgia
| | - Michael Vavuranakis
- Division of Cardiology, Section of Electrophysiology, Emory University School of Medicine, Atlanta, Georgia
| | - Neal Kumar Bhatia
- Division of Cardiology, Section of Electrophysiology, Emory University School of Medicine, Atlanta, Georgia
| | - Stacy B Westerman
- Division of Cardiology, Section of Electrophysiology, Emory University School of Medicine, Atlanta, Georgia
| | - Anand D Shah
- Division of Cardiology, Section of Electrophysiology, Emory University School of Medicine, Atlanta, Georgia
| | - Michael S Lloyd
- Division of Cardiology, Section of Electrophysiology, Emory University School of Medicine, Atlanta, Georgia
| | - Miguel Leal
- Division of Cardiology, Section of Electrophysiology, Emory University School of Medicine, Atlanta, Georgia
| | - David B De Lurgio
- Division of Cardiology, Section of Electrophysiology, Emory University School of Medicine, Atlanta, Georgia
| | - Alam Merchant
- Division of Cardiology, Section of Electrophysiology, Emory University School of Medicine, Atlanta, Georgia
| | - Anastasios Panagopoulos
- Division of Cardiology, Section of Electrophysiology, Emory University School of Medicine, Atlanta, Georgia
| | - Anshul M Patel
- Division of Cardiology, Section of Electrophysiology, Emory University School of Medicine, Atlanta, Georgia
| | - Christine Tompkins
- Division of Cardiology, Section of Electrophysiology, Emory University School of Medicine, Atlanta, Georgia
| | - Angel R Leon
- Division of Cardiology, Section of Electrophysiology, Emory University School of Medicine, Atlanta, Georgia
| | - Faisal M Merchant
- Division of Cardiology, Section of Electrophysiology, Emory University School of Medicine, Atlanta, Georgia
| | - Mikhael F El-Chami
- Division of Cardiology, Section of Electrophysiology, Emory University School of Medicine, Atlanta, Georgia.
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12
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Staloch D, Lloyd MS. The Cockroach of Critical Care: Atrial Fibrillation and Predictors in the ICU Setting. Cardiology 2023; 149:174-175. [PMID: 37967541 DOI: 10.1159/000534783] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 10/10/2023] [Accepted: 10/13/2023] [Indexed: 11/17/2023]
Affiliation(s)
- Dustin Staloch
- Emory University Section of Cardiac Electrophysiology, Atlanta, Georgia, USA
| | - Michael S Lloyd
- Emory University Section of Cardiac Electrophysiology, Atlanta, Georgia, USA
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13
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Black GB, Kim JH, Vitter S, Ibrahim R, Lisko JC, Perdoncin E, Shekiladze N, Gleason PT, Grubb KJ, Greenbaum AB, Devireddy CM, Guyton RA, Leshnower B, Merchant FM, El-Chami M, Westerman SB, Shah AD, Leon AR, Lloyd MS, Babaliaros VC, Kiani S. Prospective validation of a risk score to predict pacemaker implantation after transcatheter aortic valve replacement. J Cardiovasc Electrophysiol 2023; 34:2225-2232. [PMID: 37702135 DOI: 10.1111/jce.16061] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Revised: 07/25/2023] [Accepted: 08/28/2023] [Indexed: 09/14/2023]
Abstract
INTRODUCTION The need for pacemaker is a common complication after transcatheter aortic valve replacement (TAVR). We previously described the Emory Risk Score (ERS) to predict the need for new pacemaker implant (PPM) after TAVR. Metrics included in the score are a history of syncope, pre-existing RBBB, QRS duration ≥140 ms, and prosthesis oversizing ≥16%. To prospectively validate the previously described risk score. METHODS We prospectively evaluated all patients without pre-existing pacemakers, ICD, or pre-existing indications for pacing undergoing TAVR with the Edwards SAPIEN 3 prosthesis at our institution from March 2019 to December 2020 (n = 661). Patients were scored prospectively; however, results were blinded from clinical decision-making. The primary endpoint was PPM at 30 days after TAVR. Performance of the ERS was evaluated using logistic regression, a calibration curve to prior performance, and receiver operating characteristic (ROC) analysis. RESULTS A total of 48 patients (7.3%) had PPM after TAVR. A higher ERS predicted an increased likelihood of PPM (OR 2.61, 95% CI: 2.05-3.25 per point, p < 0.001). There was good correlation between observed and expected values on the calibration curve (slope = 1.04, calibration at large = 0.001). The area under the ROC curve was 0.81 (95% CI [0.74-0.88], p < 0.001). CONCLUSIONS The ERS prospectively predicted the need for PPM in a serial, real-world cohort of patients undergoing TAVR with a balloon-expandable prosthesis, confirming findings previously described in retrospective cohorts. Notably, the prospective performance of the score was comparable with that of the initial cohorts. The risk score could serve as a framework for preprocedural risk stratification for PPM after TAVR.
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Affiliation(s)
- George B Black
- Department of Medicine, Division of Cardiology, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Joshua H Kim
- Department of Medicine, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Sophie Vitter
- Department of Medicine, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Rand Ibrahim
- Department of Medicine, Division of Cardiology, Emory University School of Medicine, Atlanta, Georgia, USA
| | - John C Lisko
- Department of Medicine, Division of Cardiology, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Emily Perdoncin
- Department of Medicine, Division of Cardiology, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Nikoloz Shekiladze
- Department of Medicine, Division of Cardiology, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Patrick T Gleason
- Department of Medicine, Division of Cardiology, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Kendra J Grubb
- Department of Surgery, Division of Cardiothoracic Surgery, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Adam B Greenbaum
- Department of Medicine, Division of Cardiology, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Chandan M Devireddy
- Department of Medicine, Division of Cardiology, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Robert A Guyton
- Department of Surgery, Division of Cardiothoracic Surgery, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Bradley Leshnower
- Department of Surgery, Division of Cardiothoracic Surgery, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Faisal M Merchant
- Department of Medicine, Division of Cardiology, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Mikhael El-Chami
- Department of Medicine, Division of Cardiology, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Stacy B Westerman
- Department of Medicine, Division of Cardiology, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Anand D Shah
- Department of Medicine, Division of Cardiology, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Angel R Leon
- Department of Medicine, Division of Cardiology, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Michael S Lloyd
- Department of Medicine, Division of Cardiology, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Vasilis C Babaliaros
- Department of Medicine, Division of Cardiology, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Soroosh Kiani
- Department of Medicine, Division of Cardiology, UMass Chan Medical School, Worcester, Massachusetts, USA
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14
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Huang J, Bhatia NK, Lloyd MS, Westerman S, Shah A, Leal M, Delurgio D, Patel AM, Tompkins C, Leon AR, El-Chami MF, Merchant FM. Outcomes of leadless pacemaker implantation after cardiac surgery and transcatheter structural valve interventions. J Cardiovasc Electrophysiol 2023; 34:2216-2222. [PMID: 37727925 DOI: 10.1111/jce.16074] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Revised: 08/29/2023] [Accepted: 09/08/2023] [Indexed: 09/21/2023]
Abstract
INTRODUCTION Permanent pacing indications are common after cardiac surgery and transcatheter structural valve interventions. Leadless pacemakers (LPs) have emerged as a useful alternative to transvenous pacemakers. However, current commercially available LPs are unable to provide atrial pacing or cardiac resynchronization and relatively little is known about LP outcomes after cardiac surgery and transcatheter valve interventions. METHODS This retrospective study included patients who received a Micra VR (MicraTM MC1VR01) or Micra AV (MicraTM MC1AVR1) (Medtronic) leadless pacemaker following cardiac surgery or transcatheter structural valve intervention between September 2014 and September 2022. Device performance and clinical outcomes, including ventricular pacing burden, ejection fraction, and need for conversion to transvenous pacing systems, were evaluated during follow-up. RESULTS A total of 78 patients were included, of whom 40 received a Micra VR LP implant, and 38 received a Micra AV LP implant. The mean age of the cohort was 65.9 ± 17.9 years, and 48.1% were females. The follow-up duration for the entire cohort was 1.3 ± 1.1 years: 1.6 ± 1.3 years for the Micra VR group and 0.8 ± 0.5 years for the Micra AV group. Among the cohort, 50 patients had undergone cardiac surgery and 28 underwent transcatheter structural valve interventions. Device electrical performance was excellent during follow-up, with a small but clinically insignificant increase in ventricular pacing threshold and a slight decrease in pacing impedance. The mean right ventricle pacing (RVP) burden significantly decreased over time in the entire cohort (74.3% ± 37.2% postprocedure vs. 47.7% ± 40.6% at last follow-up, p < .001), and left ventricle ejection fraction (LVEF) showed a modest but significant downward trend during follow-up (55.0% ± 10.6% vs. 51.5% ± 11.2% p < .001). Patients with Micra VR implants had significantly reduced LVEF during follow-up (54.1% ± 11.9% vs. 48.8% ± 11.9%, p = .003), whereas LVEF appeared stable in the Micra AV group during follow-up (56.1% ± 9.0% vs. 54.6% ± 9.7%, p = .06). Six patients (7.7%) required conversion to transvenous pacing systems, four who required cardiac resynchronization for drop in LVEF with high RVP burden and two who required dual-chamber pacemakers for symptomatic sinus node dysfunction. CONCLUSION Leadless pacemakers provide a useful alternative to transvenous pacemakers in appropriately selected patients after cardiac surgery and transcatheter structural valve interventions. Device performance is excellent over medium-term follow-up. However, a significant minority of patients require conversion to transvenous pacing systems for cardiac resynchronization or atrial pacing support, demonstrating the need for close electrophysiologic follow-up in this cohort.
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Affiliation(s)
- Jingwen Huang
- Department of Medicine, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Neal K Bhatia
- Department of Medicine, Emory University School of Medicine, Atlanta, Georgia, USA
- Department of Medicine, Emory University School of Medicine, Division of Cardiology, Atlanta, Georgia, USA
| | - Michael S Lloyd
- Department of Medicine, Emory University School of Medicine, Atlanta, Georgia, USA
- Department of Medicine, Emory University School of Medicine, Division of Cardiology, Atlanta, Georgia, USA
| | - Stacy Westerman
- Department of Medicine, Emory University School of Medicine, Atlanta, Georgia, USA
- Department of Medicine, Emory University School of Medicine, Division of Cardiology, Atlanta, Georgia, USA
| | - Anand Shah
- Department of Medicine, Emory University School of Medicine, Atlanta, Georgia, USA
- Department of Medicine, Emory University School of Medicine, Division of Cardiology, Atlanta, Georgia, USA
| | - Miguel Leal
- Department of Medicine, Emory University School of Medicine, Atlanta, Georgia, USA
- Department of Medicine, Emory University School of Medicine, Division of Cardiology, Atlanta, Georgia, USA
| | - David Delurgio
- Department of Medicine, Emory University School of Medicine, Atlanta, Georgia, USA
- Department of Medicine, Emory University School of Medicine, Division of Cardiology, Atlanta, Georgia, USA
| | - Anshul M Patel
- Department of Medicine, Emory University School of Medicine, Atlanta, Georgia, USA
- Department of Medicine, Emory University School of Medicine, Division of Cardiology, Atlanta, Georgia, USA
| | - Christine Tompkins
- Department of Medicine, Emory University School of Medicine, Atlanta, Georgia, USA
- Department of Medicine, Emory University School of Medicine, Division of Cardiology, Atlanta, Georgia, USA
| | - Angel R Leon
- Department of Medicine, Emory University School of Medicine, Atlanta, Georgia, USA
- Department of Medicine, Emory University School of Medicine, Division of Cardiology, Atlanta, Georgia, USA
| | - Mikhael F El-Chami
- Department of Medicine, Emory University School of Medicine, Atlanta, Georgia, USA
- Department of Medicine, Emory University School of Medicine, Division of Cardiology, Atlanta, Georgia, USA
| | - Faisal M Merchant
- Department of Medicine, Emory University School of Medicine, Atlanta, Georgia, USA
- Department of Medicine, Emory University School of Medicine, Division of Cardiology, Atlanta, Georgia, USA
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15
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Moore JP, Aboulhosn JA, Zeppenfeld K, Waldmann V, Bessière F, Blom NA, Combes N, Fish FA, McLeod CJ, Kanter RJ, Tan W, Patel N, von Alvensleben JC, Kamp A, Lloyd MS, Anderson CC, Tan RB, Mariucci E, Levi DS, Salem M, Shivkumar K, Khairy P. Rationale and Design of the Multicenter Catheter Ablation of Ventricular Tachycardia Before Transcatheter Pulmonary Valve Replacement in Repaired Tetralogy of Fallot Study. Am J Cardiol 2023; 204:14-21. [PMID: 37536198 DOI: 10.1016/j.amjcard.2023.07.087] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Revised: 07/08/2023] [Accepted: 07/13/2023] [Indexed: 08/05/2023]
Abstract
Patients with repaired tetralogy of Fallot are at elevated risk for ventricular arrhythmia and sudden cardiac death. Over the past decade, the pathogenesis and natural history of ventricular tachycardia has become increasingly understood, and catheter ablation has emerged as an effective treatment modality. Concurrently, there has been great progress in the development of a versatile array of transcatheter valves that can be placed in the native right ventricular outflow tract for the treatment of long-standing pulmonary regurgitation. Although such valve platforms may eliminate the need for repeat cardiac operations, they may also impede catheter access to the myocardial substrates responsible for sustained macro-reentrant ventricular tachycardia. This manuscript provides the rationale and design of a recently devised multicenter study that will examine the clinical outcomes of a uniform, preemptive strategy to eliminate ventricular tachycardia substrates before transcatheter pulmonary valve implantation in patients with tetralogy of Fallot.
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Affiliation(s)
- Jeremy P Moore
- Ahmanson/UCLA Adult Congenital Heart Disease Center, Los Angeles, California.
| | - Jamil A Aboulhosn
- Ahmanson/UCLA Adult Congenital Heart Disease Center, Los Angeles, California
| | - Katja Zeppenfeld
- Department of Cardiology, Heart Lung Centre, Leiden University Medical Centre, 2300 RC Leiden, The Netherlands
| | - Victor Waldmann
- Paris Cardiovascular Research Center (PARCC), Institut national de la santé et de la recherche médicale (Inserm), Université Paris Cité, Paris, France; Adult Congenital Heart Disease Medico-Surgical Unit; M3C-Necker, Hôpital Universitaire Necker-Enfants malades, Assistance Publique - Hôpitaux de Paris (APHP), Paris, France
| | - Francis Bessière
- Cardiac Electrophysiology Unit, European Georges Pompidou Hospital, Paris, France; Louis Pradel Hospital, Hospices Civils de Lyon, Université Lyon 1 Claude Bernard, Lyon, France
| | - Nico A Blom
- Pediatric Cardiology, Leiden University Medical Center, Leiden, The Netherlands; Department of Pediatric Cardiology, Academic Medical Center, Amsterdam, The Netherlands
| | - Nicolas Combes
- Department of Congenital Heart Diseases, Centre de Référence Malformations Cardiaques Congénitales Complexes M3C, Hôpital Marie Lannelongue, Groupe Hospitalier Paris-Saint Joseph, Plessis-Robinson, Paris, France; University of Versailles Saint-Quentin-en-Yvelines (UVSQ), Institut national de la santé et de la recherche médicale (Inserm), CESP U1018, Université Paris-Saclay, Le Kremlin-Bicêtre, France
| | - Frank A Fish
- Vanderbilt University Medical Center, Nashville, Tennessee
| | | | - Ronald J Kanter
- Nicklaus Children's Hospital, Miami, Florida; Duke University School of Medicine, Durham, North Carolina
| | - Weiyi Tan
- Adult Congenital Heart Disease, Division of Cardiology, University of Texas Southwestern Medical Center, Dallas, Texas
| | - Nimesh Patel
- Adult Congenital Heart Disease, Division of Cardiology, University of Texas Southwestern Medical Center, Dallas, Texas
| | | | - Anna Kamp
- The Heart Center, Nationwide Children's Hospital, the Ohio State University, Columbus, Ohio
| | - Michael S Lloyd
- Department of Cardiac Electrophysiology, Emory University, Atlanta, Georgia
| | - Charles C Anderson
- Center for Congenital Heart Disease, Providence Sacred Heart Children's Hospital, Spokane, Washington
| | - Reina B Tan
- Division of Cardiology, Hassenfeld Children's Hospital, NYU Langone Health, New York, New York
| | - Elisabetta Mariucci
- Pediatric Cardiology and Adult Congenital Heart Disease Program, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) Azienda Ospedaliero-Universitaria di Bologna, Italy
| | - Daniel S Levi
- Kaiser Permanente Los Angeles Medical Center, Los Angeles, California
| | - Morris Salem
- Ahmanson/UCLA Adult Congenital Heart Disease Center, Los Angeles, California; Kaiser Permanente Los Angeles Medical Center, Los Angeles, California
| | - Kalyanam Shivkumar
- UCLA Cardiac Arrhythmia Center, UCLA Health System, David Geffen School of Medicine at University of California, Los Angeles, Los Angeles, California
| | - Paul Khairy
- Montreal Heart Institute, Université de Montréal, Montreal, Que, Canada
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16
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Hoskins MH, Lisko JC, Greenbaum AB, Ueyama HA, Merchant FM, Lloyd MS, Gleason PT, El-Chami MF, Byku I, Block PC, Lederman RJ, Babaliaros VC, Westerman SB. Septal Bipolar Ablation to Prevent Left Ventricular Outflow Tract Obstruction After Transcatheter Mitral Valve Implantation. Circ Cardiovasc Interv 2023; 16:e013333. [PMID: 37712286 PMCID: PMC10592079 DOI: 10.1161/circinterventions.123.013333] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 09/16/2023]
Affiliation(s)
- Michael H. Hoskins
- Department of Medicine, Division of Cardiology, Section of Electrophysiology and Pacing, Emory University School of Medicine, Atlanta, Georgia, USA
- Department of Cardiology, New Mexico Heart Institute, Albuquerque, New Mexico, USA
| | - John C. Lisko
- Division of Cardiology, Emory Structural Heart and Valve Center, Emory University Hospital Midtown, Atlanta, Georgia, USA
| | - Adam B. Greenbaum
- Division of Cardiology, Emory Structural Heart and Valve Center, Emory University Hospital Midtown, Atlanta, Georgia, USA
| | - Hiroki A. Ueyama
- Division of Cardiology, Emory Structural Heart and Valve Center, Emory University Hospital Midtown, Atlanta, Georgia, USA
| | - Faisal M. Merchant
- Department of Medicine, Division of Cardiology, Section of Electrophysiology and Pacing, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Michael S. Lloyd
- Department of Medicine, Division of Cardiology, Section of Electrophysiology and Pacing, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Patrick T. Gleason
- Division of Cardiology, Emory Structural Heart and Valve Center, Emory University Hospital Midtown, Atlanta, Georgia, USA
| | - Mikhael F. El-Chami
- Department of Medicine, Division of Cardiology, Section of Electrophysiology and Pacing, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Isida Byku
- Division of Cardiology, Emory Structural Heart and Valve Center, Emory University Hospital Midtown, Atlanta, Georgia, USA
| | - Peter C. Block
- Division of Cardiology, Emory Structural Heart and Valve Center, Emory University Hospital Midtown, Atlanta, Georgia, USA
| | - Robert J. Lederman
- Cardiovascular Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, Maryland, USA
| | - Vasilis C. Babaliaros
- Division of Cardiology, Emory Structural Heart and Valve Center, Emory University Hospital Midtown, Atlanta, Georgia, USA
| | - Stacy B. Westerman
- Department of Medicine, Division of Cardiology, Section of Electrophysiology and Pacing, Emory University School of Medicine, Atlanta, Georgia, USA
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Knijnik L, Wang B, Cardoso R, Shanafelt C, Lloyd MS. Clinical outcomes of automatic algorithms in cardiac resynchronization therapy: Systematic review and meta-analysis. Heart Rhythm O2 2023; 4:618-624. [PMID: 37936674 PMCID: PMC10626183 DOI: 10.1016/j.hroo.2023.09.001] [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] [Indexed: 11/09/2023] Open
Abstract
Background Algorithms to automatically adjust atrioventricular (AV) and interventricular (VV) intervals in cardiac resynchronization therapy (CRT) devices are common, but their clinical efficacy is unknown. Objective The purpose of this study was to evaluate automatic CRT algorithms in patients with heart failure for the reduction of mortality, heart failure hospitalizations, and clinical improvement. Methods We performed a systematic review and meta-analysis of randomized controlled trials (RCTs) in patients with CRT using automatic algorithms that change AV and VV intervals dynamically without manual input, on a beat-to-beat basis. We performed a subgroup analysis including intracardiac electrogram-based (EGM) algorithms and contractility-based algorithms. Results Nine RCTs with 8531 participants were included, of whom 4275 (50.1%) were randomized to automatic algorithm. Seven of the 9 trials used EGM-based algorithms, and 2 used contractility sensors. There was no difference in all-cause mortality (10.3% vs 11.3%; odds ratio [OR] 0.90; 95% confidence interval [CI] 0.71-1.03; P = .13; I2 = 0%) or heart failure hospitalizations (15.0% vs 16.1%; OR 0.924; 95% CI 0.81-1.04; P = .194; I2 = 0%) between the automatic algorithm group and the control group. Study-defined clinical improvement was also not significantly different between groups (66.6% vs 63.3%; risk ratio 1.01; 95% CI 0.95-1.06; P = .82; I2 = 50%). In the contractility-based subgroup, there was a trend toward greater clinical improvement with the use of the automatic algorithm (75% vs 68.3%; OR 1.45; 95% CI 0.97-2.18; P = .07; I2 = 40%), which did not reach statistical significance. The overall risk of bias was low. Conclusion Automatic algorithms that change AV or VV intervals did not improve mortality, heart failure hospitalizations, or cardiovascular symptoms in patients with heart failure and CRT.
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Affiliation(s)
- Leonardo Knijnik
- Emory University Adult Congenital Heart Center, Atlanta, Georgia
| | - Bo Wang
- Emory University Adult Congenital Heart Center, Atlanta, Georgia
| | - Rhanderson Cardoso
- Heart and Vascular Center, Brigham and Women’s Hospital, Boston Massachusetts
| | - Colby Shanafelt
- Emory University Adult Congenital Heart Center, Atlanta, Georgia
| | - Michael S. Lloyd
- Emory University Adult Congenital Heart Center, Atlanta, Georgia
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18
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van der Ree MH, Cuculich PS, van Herk M, Hugo GD, Balt JC, Bates M, Ho G, Pruvot E, Herrera-Siklody C, Hoeksema WF, Lee J, Lloyd MS, Kemme MJB, Sacher F, Tixier R, Verhoeff JJC, Balgobind BV, Robinson CG, Rasch CRN, Postema PG. Interobserver variability in target definition for stereotactic arrhythmia radioablation. Front Cardiovasc Med 2023; 10:1267800. [PMID: 37799779 PMCID: PMC10547862 DOI: 10.3389/fcvm.2023.1267800] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Accepted: 09/05/2023] [Indexed: 10/07/2023] Open
Abstract
Background Stereotactic arrhythmia radioablation (STAR) is a potential new therapy for patients with refractory ventricular tachycardia (VT). The arrhythmogenic substrate (target) is synthesized from clinical and electro-anatomical information. This study was designed to evaluate the baseline interobserver variability in target delineation for STAR. Methods Delineation software designed for research purposes was used. The study was split into three phases. Firstly, electrophysiologists delineated a well-defined structure in three patients (spinal canal). Secondly, observers delineated the VT-target in three patients based on case descriptions. To evaluate baseline performance, a basic workflow approach was used, no advanced techniques were allowed. Thirdly, observers delineated three predefined segments from the 17-segment model. Interobserver variability was evaluated by assessing volumes, variation in distance to the median volume expressed by the root-mean-square of the standard deviation (RMS-SD) over the target volume, and the Dice-coefficient. Results Ten electrophysiologists completed the study. For the first phase interobserver variability was low as indicated by low variation in distance to the median volume (RMS-SD range: 0.02-0.02 cm) and high Dice-coefficients (mean: 0.97 ± 0.01). In the second phase distance to the median volume was large (RMS-SD range: 0.52-1.02 cm) and the Dice-coefficients low (mean: 0.40 ± 0.15). In the third phase, similar results were observed (RMS-SD range: 0.51-1.55 cm, Dice-coefficient mean: 0.31 ± 0.21). Conclusions Interobserver variability is high for manual delineation of the VT-target and ventricular segments. This evaluation of the baseline observer variation shows that there is a need for methods and tools to improve variability and allows for future comparison of interventions aiming to reduce observer variation, for STAR but possibly also for catheter ablation.
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Affiliation(s)
- Martijn H. van der Ree
- Department of Cardiology, Amsterdam UMC Location University of Amsterdam, Amsterdam, Netherlands
- Department of Cardiology, Amsterdam Cardiovascular Sciences, Heart Failure and Arrhythmias, Amsterdam, Netherlands
| | - Phillip S. Cuculich
- Department of Internal Medicine, Cardiovascular Division, Washington University School of Medicine, St. Louis, MO, United States
| | - Marcel van Herk
- Department of Radiation Oncology, Manchester Academic Health Centre, University of Manchester, Manchester, United Kingdom
| | - Geoffrey D. Hugo
- Department of Radiation Oncology, Washington University School of Medicine, St. Louis, MO, United States
| | - Jippe C. Balt
- Department of Cardiology, St. Antonius Hospital, Nieuwegein, Netherlands
| | - Matthew Bates
- Department of Cardiology, South Tees Hospitals NHS Foundation Trust, Middleborough, United Kingdom
| | - Gordon Ho
- Department of Medicine, Division of Cardiology Cardiac Electrophysiology, Cardiovascular Institute, University of California San Diego, San Diego, CA, United States
| | - Etienne Pruvot
- Heart and Vessel Department, Service of Cardiology, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | - Claudia Herrera-Siklody
- Heart and Vessel Department, Service of Cardiology, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | - Wiert F. Hoeksema
- Department of Cardiology, Amsterdam UMC Location University of Amsterdam, Amsterdam, Netherlands
- Department of Cardiology, Amsterdam Cardiovascular Sciences, Heart Failure and Arrhythmias, Amsterdam, Netherlands
| | - Justin Lee
- Department of Immunity, Infection and Cardiovascular Disease, University of Sheffield, Sheffield, United Kingdom
| | - Michael S. Lloyd
- Section of Cardiac Electrophysiology, Emory University, Atlanta, GA, United States
| | - Michiel J. B. Kemme
- Department of Cardiology, Amsterdam Cardiovascular Sciences, Heart Failure and Arrhythmias, Amsterdam, Netherlands
- Department of Cardiology, Amsterdam UMC Location Vrije Universiteit Amsterdam, Amsterdam, Netherlands
| | - Frederic Sacher
- Cardiac Arrhythmia Department, IHU LIRYC, Bordeaux University Hospital, Bordeaux, France
| | - Romain Tixier
- Cardiac Arrhythmia Department, IHU LIRYC, Bordeaux University Hospital, Bordeaux, France
| | | | | | - Clifford G. Robinson
- Department of Radiation Oncology, Washington University School of Medicine, St. Louis, MO, United States
| | | | - Pieter G. Postema
- Department of Cardiology, Amsterdam UMC Location University of Amsterdam, Amsterdam, Netherlands
- Department of Cardiology, Amsterdam Cardiovascular Sciences, Heart Failure and Arrhythmias, Amsterdam, Netherlands
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19
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Tian S, Zhong X, Wang H, Wei J, Guo W, Wang R, Paul Estillore J, Napolitano C, Duff HH, Ilhan E, Knight LM, Lloyd MS, Roberts JD, Priori SG, Chen SRW. RyR2 C-terminal truncating variants identified in patients with arrhythmic phenotypes exert a dominant negative effect through formation of wildtype-truncation heteromers. Biochem J 2023; 480:1379-1395. [PMID: 37492947 DOI: 10.1042/bcj20230254] [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] [Received: 06/19/2023] [Revised: 07/19/2023] [Accepted: 07/25/2023] [Indexed: 07/27/2023]
Abstract
Gain-of-function missense variants in the cardiac ryanodine receptor (RyR2) are linked to catecholaminergic polymorphic ventricular tachycardia (CPVT), whereas RyR2 loss-of-function missense variants cause Ca2+ release deficiency syndrome (CRDS). Recently, truncating variants in RyR2 have also been associated with ventricular arrhythmias (VAs) and sudden cardiac death. However, there are limited insights into the potential clinical relevance and in vitro functional impact of RyR2 truncating variants. We performed genetic screening of patients presenting with syncope, VAs, or unexplained sudden death and in vitro characterization of the expression and function of RyR2 truncating variants in HEK293 cells. We identified two previously unknown RyR2 truncating variants (Y4591Ter and R4663Ter) and one splice site variant predicted to result in a frameshift and premature termination (N4717 + 15Ter). These 3 new RyR2 truncating variants and a recently reported RyR2 truncating variant, R4790Ter, were generated and functionally characterized in vitro. Immunoprecipitation and immunoblotting analyses showed that all 4 RyR2 truncating variants formed heteromers with the RyR2-wildtype (WT) protein. Each of these C-terminal RyR2 truncations was non-functional and suppressed [3H]ryanodine binding to RyR2-WT and RyR2-WT mediated store overload induced spontaneous Ca2+ release activity in HEK293 cells. The expression of these RyR2 truncating variants in HEK293 cells was markedly reduced compared with that of the full-length RyR2 WT protein. Our data indicate that C-terminal RyR2 truncating variants are non-functional and can exert a dominant negative impact on the function of the RyR2 WT protein through formation of heteromeric WT/truncation complex.
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Affiliation(s)
- Shanshan Tian
- Libin Cardiovascular Institute, Department of Physiology and Pharmacology, University of Calgary, Calgary, Alberta T2N 4N1, Canada
| | - Xiaowei Zhong
- Libin Cardiovascular Institute, Department of Physiology and Pharmacology, University of Calgary, Calgary, Alberta T2N 4N1, Canada
| | - Hui Wang
- Libin Cardiovascular Institute, Department of Physiology and Pharmacology, University of Calgary, Calgary, Alberta T2N 4N1, Canada
| | - Jinhong Wei
- Libin Cardiovascular Institute, Department of Physiology and Pharmacology, University of Calgary, Calgary, Alberta T2N 4N1, Canada
- School of Medicine, Northwest University, Xi'an 710069, China
| | - Wenting Guo
- Libin Cardiovascular Institute, Department of Physiology and Pharmacology, University of Calgary, Calgary, Alberta T2N 4N1, Canada
| | - Ruiwu Wang
- Libin Cardiovascular Institute, Department of Physiology and Pharmacology, University of Calgary, Calgary, Alberta T2N 4N1, Canada
| | - John Paul Estillore
- Libin Cardiovascular Institute, Department of Physiology and Pharmacology, University of Calgary, Calgary, Alberta T2N 4N1, Canada
| | - Carlo Napolitano
- European Reference Network 'ERN GUARD-Heart', Amsterdam, Netherlands
- Division of Cardiology and Molecular Cardiology, IRCCS Maugeri Foundation-University of Pavia, 27100 Pavia, Italy
- Department of Molecular Medicine, University of Pavia, 27100 Pavia, Italy
| | - Henry H Duff
- Libin Cardiovascular Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta T2N 4N1, Canada
| | - Erkan Ilhan
- Libin Cardiovascular Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta T2N 4N1, Canada
| | - Linda M Knight
- Children's Healthcare of Atlanta Cardiology, Atlanta, Georgia, U.S.A
| | - Michael S Lloyd
- Emory University School of Medicine, Atlanta, Georgia, U.S.A
| | - Jason D Roberts
- Population Health Research Institute, McMaster University, and Hamilton Health Sciences, Hamilton, Ontario, Canada
| | - Silvia G Priori
- European Reference Network 'ERN GUARD-Heart', Amsterdam, Netherlands
- Division of Cardiology and Molecular Cardiology, IRCCS Maugeri Foundation-University of Pavia, 27100 Pavia, Italy
- Department of Molecular Medicine, University of Pavia, 27100 Pavia, Italy
- Molecular Cardiology Laboratory, Centro de Investigaciones Cardiovasculares Carlos III, 28029 Madrid, Spain
| | - S R Wayne Chen
- Libin Cardiovascular Institute, Department of Physiology and Pharmacology, University of Calgary, Calgary, Alberta T2N 4N1, Canada
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20
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Iravanian S, Uzelac I, Shah AD, Toye MJ, Lloyd MS, Burke MA, Daneshmand MA, Attia TS, Vega JD, El-Chami M, Merchant FM, Cherry EM, Bhatia NK, Fenton FH. Higher-Order Dynamics Beyond Repolarization Alternans in Ex-Vivo Human Ventricles are Independent of the Restitution Properties. medRxiv 2023:2023.08.16.23293853. [PMID: 37662394 PMCID: PMC10473769 DOI: 10.1101/2023.08.16.23293853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/05/2023]
Abstract
Background Repolarization alternans, defined as period-2 oscillation in the repolarization phase of the action potentials, provides a mechanistic link between cellular dynamics and ventricular fibrillation (VF). Theoretically, higher-order periodicities (e.g., periods 4, 6, 8,...) are expected but have minimal experimental evidence. Methods We studied explanted human hearts obtained from recipients of heart transplantation at the time of surgery. Optical mapping of the transmembrane potential was performed after staining the hearts with voltage-sensitive fluorescent dyes. Hearts were stimulated at an increasing rate until VF was induced. Signals recorded from the right ventricle endocardial surface prior to induction of VF and in the presence of 1:1 conduction were processed using the Principal Component Analysis and a combinatorial algorithm to detect and quantify higher-order dynamics. Results were correlated to the underlying electrophysiological characteristics as quantified by restitution curves and conduction velocity. Results A prominent and statistically significant global 1:4 peak (corresponding to period-4 dynamics) was seen in three of the six studied hearts. Local (pixel-wise) analysis revealed the spatially heterogeneous distribution of periods 4, 6, and 8, with the regional presence of periods greater than two in all the hearts. There was no significant correlation between the underlying restitution properties and the period of each pixel. Discussion We present evidence of higher-order periodicities and the co-existence of such regions with stable non-chaotic areas in ex-vivo human hearts. We infer from the independence of the period to the underlying restitution properties that the oscillation of the excitation-contraction coupling and calcium cycling mechanisms is the primary mechanism of higher-order dynamics. These higher-order regions may act as niduses of instability that can degenerate into chaotic fibrillation and may provide targets for substrate-based ablation of VF.
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Affiliation(s)
- Shahriar Iravanian
- Department of Cardiovascular Medicine, Emory University School of Medicine, Atlanta, GA
| | - Ilija Uzelac
- Georgia Tech, Department of Physics, Atlanta, GA
| | - Anand D Shah
- Department of Cardiovascular Medicine, Emory University School of Medicine, Atlanta, GA
| | | | - Michael S. Lloyd
- Department of Cardiovascular Medicine, Emory University School of Medicine, Atlanta, GA
| | - Michael A. Burke
- Department of Cardiovascular Medicine, Emory University School of Medicine, Atlanta, GA
| | - Mani A Daneshmand
- Division of Cardiovascular Surgery, Department of Surgery, Emory University School of Medicine, Atlanta, GA
| | - Tamer S Attia
- Division of Cardiovascular Surgery, Department of Surgery, Emory University School of Medicine, Atlanta, GA
| | - J David Vega
- Division of Cardiovascular Surgery, Department of Surgery, Emory University School of Medicine, Atlanta, GA
| | - Michael El-Chami
- Department of Cardiovascular Medicine, Emory University School of Medicine, Atlanta, GA
| | - Faisal M. Merchant
- Department of Cardiovascular Medicine, Emory University School of Medicine, Atlanta, GA
| | | | - Neal K. Bhatia
- Department of Cardiovascular Medicine, Emory University School of Medicine, Atlanta, GA
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21
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Lloyd MS, Brisben AJ, Reddy VY, Blomström-Lundqvist C, Boersma LV, Bongiorni MG, Burke MC, Cantillon DJ, Doshi R, Friedman PA, Gras D, Kutalek SP, Neuzil P, Roberts PR, Wright DJ, Appl U, West J, Carter N, Stein KM, Mont L, Knops RE. Design and rationale of the MODULAR ATP global clinical trial: A novel intercommunicative leadless pacing system and the subcutaneous implantable cardioverter-defibrillator. Heart Rhythm O2 2023; 4:448-456. [PMID: 37520021 PMCID: PMC10373150 DOI: 10.1016/j.hroo.2023.05.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [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] [Indexed: 08/01/2023] Open
Abstract
Background The subcutaneous implantable cardioverter-defibrillator (S-ICD) has demonstrated safety and efficacy for the treatment of malignant ventricular arrhythmias. However, a limitation of the S-ICD lies in the inability to either pace-terminate ventricular tachycardia or provide prolonged bradycardia pacing support. Objective The rationale and design of a prospective, single-arm, multinational trial of an intercommunicative leadless pacing system integrated with the S-ICD will be presented. Methods A technical description of the modular cardiac rhythm management (mCRM) system (EMPOWER leadless pacemaker and EMBLEM S-ICD) and the implantation procedure is provided. MODULAR ATP (Effectiveness of the EMPOWER™ Modular Pacing System and EMBLEM™ Subcutaneous ICD to Communicate Antitachycardia Pacing) is a multicenter, international trial enrolling up to 300 patients at risk of sudden cardiac death at up to 60 centers trial design. The safety endpoint of freedom from major complications related to the mCRM system or implantation procedure at 6 months and 2 years are significantly higher than 86% and 81%, respectively, and all-cause survival is significantly >85% at 2 years. Results Efficacy endpoints are that at 6 months mCRM communication success is significantly higher than 88% and the percentage of subjects with low and stable thresholds is significantly higher than 80%. Substudies to evaluate rate-responsive features and performance of the pacing module are also described. Conclusion The MODULAR ATP global clinical trial will prospectively test the safety and efficacy of the first intercommunicating leadless pacing system with the S-ICD. This trial will allow for robust validation of device-device communication, pacing performance, rate responsiveness, and system safety.
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Affiliation(s)
| | | | - Vivek Y. Reddy
- Icahn School of Medicine, Mount Sinai, New York, New York
| | - Carina Blomström-Lundqvist
- School of Medical Sciences, Faculty of Medicine and Health, Örebro University, Örebro, Sweden
- Department of Medical Sciences, Cardiology - Arrhythmia, Uppsala University, Uppsala, Sweden
| | - Lucas V.A. Boersma
- Department of Cardiology, St. Antonius Hospital, Nieuwegein, the Netherlands
- Department of Cardiology, Amsterdam University Medical Center, Amsterdam, the Netherlands
| | | | | | | | - Rahul Doshi
- Heart and Vascular Health, HonorHealth Research Institute, Scottsdale, Arizona
- College of Medicine, University of Arizona, Phoenix, Arizona
| | - Paul A. Friedman
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, Minnesota
| | - Daniel Gras
- Departement de Cardiologie, Hôpital Privé du Confluent, Nantes, France
| | - Steven P. Kutalek
- Department of Cardiology, Saint Mary Medical Center, Langhorne, Pennsylvania
- Cardiac Electrophysiology, Drexel University, Philadelphia, Pennsylvania
| | - Petr Neuzil
- Department of Cardiology, Na Homolce Hospital, Prague, Czech Republic
| | - Paul R. Roberts
- Cardiac Rhythm Management Research Department, University Hospital Southampton NHS Foundation Trust, Southampton, United Kingdom
| | - David J. Wright
- Department of Cardiology, Liverpool Heart and Chest Hospital, Liverpool, United Kingdom
| | - Ursula Appl
- Boston Scientific Corporation, St. Paul, Minnesota
| | - Julie West
- Boston Scientific Corporation, St. Paul, Minnesota
| | | | | | - Lluis Mont
- Hospital Clínic, Universitat de Barcelona, Barcelona, Spain
- Institut de Recerca Biomèdica, August Pi i Sunyer Biomedical Research Institute, Barcelona, Spain
| | - Reinoud E. Knops
- Department of Cardiology, Amsterdam University Medical Center, Amsterdam, the Netherlands
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22
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Kazerouninia A, Georgekutty J, Kendsersky P, Byrne RD, Seto B, Chu PY, Wang Y, Rodriguez FH, Smith C, Saraf A, Lloyd MS, Frischhertz BP, Parekh DR, Ermis PR, Franklin WJ, Lam WW. A Multisite Retrospective Review of Direct Oral Anticoagulants Compared to Warfarin in Adult Fontan Patients. Cardiovasc Drugs Ther 2023; 37:519-527. [PMID: 35022950 PMCID: PMC11040449 DOI: 10.1007/s10557-021-07298-5] [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] [Accepted: 11/29/2021] [Indexed: 11/25/2022]
Abstract
PURPOSE Direct oral anticoagulants (DOACs) are not recommended in adult Fontan patients (Level of Evidence C). We hypothesized that DOACs are comparable to warfarin and do not increase thrombotic and embolic complications (TEs) or clinically significant bleeds. METHODS We reviewed the medical records of adult Fontan patients on DOACs or warfarin at three major medical centers. We identified 130 patients: 48 on DOACs and 107 on warfarin. In total, they were treated for 810 months on DOACs and 5637 months on warfarin. RESULTS The incidence of TEs in patients on DOACs compared to those on warfarin was not increased in a statistically significant way (hazard ratio [HR] 1.7 and p value 0.431). Similarly, the incidence of nonmajor and major bleeds in patients on DOACs compared to those on warfarin was also not increased in a statistically significant way (HR for nonmajor bleeds in DOAC patients was 2.8 with a p value of 0.167 and the HR for major bleeds was 2.0 with a p value 0.267). In multivariate analysis, congestive heart failure (CHF) was a risk factor for TEs across both groups (odds ratio [OR] = 4.8, 95% confidence interval [CI] = 1.3-17.6) and bleed history was a risk factor for clinically significant bleeds (OR = 6.8, 95% CI = 2.7-17.2). CONCLUSION In this small, retrospective multicenter study, the use of DOACs did not increase the risk of TEs or clinically significant bleeds compared to warfarin in a statistically significant way.
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Affiliation(s)
- Amir Kazerouninia
- Departments of Internal Medicine and Pediatrics, Baylor College of Medicine, Houston, TX, USA.
| | - Justin Georgekutty
- Division of Pediatric Cardiology, Cohen Children's Medical Center/Northwell Health, New Hyde Park, NY, USA
| | - Payton Kendsersky
- Department of Medicine, Duke University School of Medicine, Durham, NC, USA
| | - Ryan D Byrne
- Departments of Internal Medicine and Pediatrics, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Brendan Seto
- University of Hawaii, John A. Burns School of Medicine, Honolulu, HI, USA
| | - Patricia Y Chu
- Departments of Internal Medicine and Pediatrics, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Yunfei Wang
- Division of Pediatric Cardiology, Texas Children's Hospital/Baylor College of Medicine, Houston, TX, USA
| | - Fred H Rodriguez
- Departments of Pediatrics and Internal Medicine, Division of Cardiology, Emory University, Atlanta, GA, USA
- Sibley Heart Center Cardiology, Atlanta, GA, USA
| | - Clayton Smith
- Departments of Pediatrics and Internal Medicine, Division of Cardiology, Emory University, Atlanta, GA, USA
- Sibley Heart Center Cardiology, Atlanta, GA, USA
| | - Anita Saraf
- Departments of Pediatrics and Internal Medicine, Division of Cardiology, Emory University, Atlanta, GA, USA
- Sibley Heart Center Cardiology, Atlanta, GA, USA
| | - Michael S Lloyd
- Department of Internal Medicine, Division of Cardiology, Emory University, Atlanta, GA, USA
| | - Benjamin P Frischhertz
- Vanderbilt Heart and Vascular Institute, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Dhaval R Parekh
- Division of Adult Congenital Cardiology, Texas Children's Hospital/Baylor College of Medicine, Houston, TX, USA
| | - Peter R Ermis
- Division of Adult Congenital Cardiology, Texas Children's Hospital/Baylor College of Medicine, Houston, TX, USA
| | - Wayne J Franklin
- Division of Adult Congenital Cardiology, Texas Children's Hospital/Baylor College of Medicine, Houston, TX, USA
| | - Wilson W Lam
- Division of Adult Congenital Cardiology, Texas Children's Hospital/Baylor College of Medicine, Houston, TX, USA
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23
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Iravanian S, Uzelac I, Shah AD, Toye MJ, Lloyd MS, Burke MA, Daneshmand MA, Attia TS, Vega JD, Merchant FM, Cherry EM, Bhatia NK, Fenton FH. Beyond Alternans: Detection of Higher-Order Periodicity in Ex-Vivo Human Ventricles Before Induction of Ventricular Fibrillation. bioRxiv 2023:2023.05.01.539003. [PMID: 37205562 PMCID: PMC10187180 DOI: 10.1101/2023.05.01.539003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Background Repolarization alternans, defined as period-2 oscillation in the repolarization phase of the action potentials, is one of the cornerstones of cardiac electrophysiology as it provides a mechanistic link between cellular dynamics and ventricular fibrillation (VF). Theoretically, higher-order periodicities (e.g., period-4, period-8,...) are expected but have very limited experimental evidence. Methods We studied explanted human hearts, obtained from the recipients of heart transplantation at the time of surgery, using optical mapping technique with transmembrane voltage-sensitive fluorescent dyes. The hearts were stimulated at an increasing rate until VF was induced. The signals recorded from the right ventricle endocardial surface just before the induction of VF and in the presence of 1:1 conduction were processed using the Principal Component Analysis and a combinatorial algorithm to detect and quantify higher-order dynamics. Results A prominent and statistically significant 1:4 peak (corresponding to period-4 dynamics) was seen in three of the six studied hearts. Local analysis revealed the spatiotemporal distribution of higher-order periods. Period-4 was localized to temporally stable islands. Higher-order oscillations (period-5, 6, and 8) were transient and primarily occurred in arcs parallel to the activation isochrones. Discussion We present evidence of higher-order periodicities and the co-existence of such regions with stable non-chaotic areas in ex-vivo human hearts before VF induction. This result is consistent with the period-doubling route to chaos as a possible mechanism of VF initiation, which complements the concordant to discordant alternans mechanism. The presence of higher-order regions may act as niduses of instability that can degenerate into chaotic fibrillation.
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24
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Jain V, Shah AD, Lloyd MS. The Need for a Universal Retrieval Tool with Countertraction for the Removal of Leadless Pacemakers Regardless of Manufacturer. Heart Rhythm 2023:S1547-5271(23)02177-X. [PMID: 37116632 DOI: 10.1016/j.hrthm.2023.04.018] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/19/2023] [Revised: 04/18/2023] [Accepted: 04/22/2023] [Indexed: 04/30/2023]
Affiliation(s)
- Vardhmaan Jain
- Emory University Section of Clinical Cardiac Electrophysiology
| | - Anand D Shah
- Emory University Section of Clinical Cardiac Electrophysiology
| | - Michael S Lloyd
- Emory University Section of Clinical Cardiac Electrophysiology.
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25
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Bhatia NK, Iravanian S, Ravi N, Kiani S, Lloyd MS, Westerman SB, Merchant FM, El-Chami MF, Hoque A, Shah AD. Novel use of an irrigated ablation catheter to monitor real-time hemodynamics during ablation. J Cardiovasc Electrophysiol 2023; 34:1111-1118. [PMID: 37036297 DOI: 10.1111/jce.15902] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/29/2023] [Revised: 03/20/2023] [Accepted: 03/30/2023] [Indexed: 04/11/2023]
Abstract
INTRODUCTION Hemodynamic decompensation during catheter ablation occurs due to prolonged procedure time and irrigant delivery directly into the cardiac chambers. Real-time hemodynamic monitoring of patients undergoing catheter ablation procedures may identify patients at risk of decompensation; we set out to assess the feasibility of a novel, real-time, intracardiac pressure monitoring system using a standard irrigated ablation catheter. METHODS We studied 13 consecutive who underwent pressure measurement of the left atrium (LA) and left ventricle (LV) via transeptal access with a Swan Ganz (SG) catheter followed by two commercially available irrigated ablation catheters. Pressure waveform data was extracted to compare LA peak pressure, LV peak systolic pressure, LV end-diastolic pressure, and waveform analysis. RESULTS Comparison between the SG and ablation catheters (AblA; AblB) demonstrated that LV systolic pressure (0.61-16.8 mmHg; 1.32-18.2 mmHg), and LV end-diastolic pressure (-3.4 to 2.8 mmHg; -3.0 to 3.35 mmHg) were well correlated and had accepted repeatability. Ablation waveforms demonstrated an 89.9 ± 6.4% correlation compared to SG waveforms. CONCLUSION Pressure measurements derived from an irrigated ablation catheter are accurate and reliable when compared to an SG catheter. Further studies are needed to determine how real-time pressure monitoring can improve outcomes during ablation procedures.
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Affiliation(s)
- Neal K Bhatia
- Department of Cardiovascular Medicine, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Shahriar Iravanian
- Department of Cardiovascular Medicine, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Namita Ravi
- Department of Internal Medicine, Yale University School of Medicine, New Haven, Connecticut, USA
| | - Soroosh Kiani
- Department of Cardiovascular Medicine, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Michael S Lloyd
- Department of Cardiovascular Medicine, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Stacy B Westerman
- Department of Cardiovascular Medicine, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Faisal M Merchant
- Department of Cardiovascular Medicine, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Mikhael F El-Chami
- Department of Cardiovascular Medicine, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Azizul Hoque
- Department of Cardiovascular Medicine, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Anand D Shah
- Department of Cardiovascular Medicine, Emory University School of Medicine, Atlanta, Georgia, USA
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Shanafelt CD, Lloyd MS. Our 17-year record against an ever-imposing foe: Outcomes of in-hospital cardiac arrests during ST elevation myocardial infarction. Resuscitation 2023; 186:109767. [PMID: 36931454 DOI: 10.1016/j.resuscitation.2023.109767] [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] [Subscribe] [Scholar Register] [Received: 03/04/2023] [Accepted: 03/07/2023] [Indexed: 03/17/2023]
Affiliation(s)
- Colby D Shanafelt
- Emory University Section of Cardiovascular Electrophysiology, Atlanta, GA, United States
| | - Michael S Lloyd
- Emory University Section of Cardiovascular Electrophysiology, Atlanta, GA, United States.
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Kiani S, Sayegh MN, Ibrahim R, Bhatia NK, Merchant FM, Shah AD, Westerman SB, De Lurgio DB, Patel AM, Thompkins CM, Leon AR, Lloyd MS, El-Chami MF. The Feasibility and Safety of Flecainide Use Among Patients With Varying Degrees of Coronary Disease. JACC Clin Electrophysiol 2023:S2405-500X(23)00003-8. [PMID: 36898953 DOI: 10.1016/j.jacep.2022.12.021] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Revised: 12/15/2022] [Accepted: 12/31/2022] [Indexed: 02/24/2023]
Abstract
BACKGROUND Class 1C antiarrhythmic agents are effective for treating atrial tachyarrhythmias, but their use is restricted in patients with coronary artery disease (CAD). Data on the safety of the use of 1C agents in patients with CAD in the absence of recent acute coronary syndromes are lacking. OBJECTIVE This study sought to evaluate the safety and feasibility of treatment with 1C agents in patients with varying degrees of CAD in a large serial, real-world cohort. METHODS We retrospectively identified all patients at our institution from January 2005 to February 2021 on a 1C agent (n = 3,445) and those on sotalol or dofetilide (n = 2,216) as controls, excluding those with a prior history of ventricular tachycardia, implantable cardioverter-defibrillator placement, or nonrevascularized myocardial infarction. Baseline clinical characteristics included degree of CAD (categorized as none, nonobstructive, or obstructive), other comorbid illness, and medication use. Clinical outcomes, including survival, were ascertained. We performed Cox regression analysis to evaluate the effect of 1C use on event-free survival across varying degrees of CAD. RESULTS After adjustment for baseline characteristics, there was an independent association between 1C use and improved mortality. However, there was an interaction between 1C use and degree of CAD (compared to sotalol) demonstrating poorer event-free survival among those with obstructive coronary disease (HR: 3.80; 95% CI: 1.67-8.67; P = 0.002). CONCLUSIONS Among select patients with nonobstructive CAD and without a history of ventricular tachycardia, 1C agents are not associated with increased mortality. Therefore, these agents may be an option for some patients in whom they are frequently restricted. Further prospective studies are warranted.
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Affiliation(s)
- Soroosh Kiani
- Department of Medicine, Division of Cardiology, Section of Electrophysiology and Pacing, Emory University School of Medicine, Atlanta, Georgia, USA. https://twitter.com/rooshMD
| | - Michael N Sayegh
- Department of Medicine, Division of Cardiology, Section of Electrophysiology and Pacing, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Rand Ibrahim
- Department of Medicine, Division of Cardiology, Section of Electrophysiology and Pacing, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Neal K Bhatia
- Department of Medicine, Division of Cardiology, Section of Electrophysiology and Pacing, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Faisal M Merchant
- Department of Medicine, Division of Cardiology, Section of Electrophysiology and Pacing, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Anand D Shah
- Department of Medicine, Division of Cardiology, Section of Electrophysiology and Pacing, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Stacy B Westerman
- Department of Medicine, Division of Cardiology, Section of Electrophysiology and Pacing, Emory University School of Medicine, Atlanta, Georgia, USA
| | - David B De Lurgio
- Department of Medicine, Division of Cardiology, Section of Electrophysiology and Pacing, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Anshul M Patel
- Department of Medicine, Division of Cardiology, Section of Electrophysiology and Pacing, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Christine M Thompkins
- Department of Medicine, Division of Cardiology, Section of Electrophysiology and Pacing, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Angel R Leon
- Department of Medicine, Division of Cardiology, Section of Electrophysiology and Pacing, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Michael S Lloyd
- Department of Medicine, Division of Cardiology, Section of Electrophysiology and Pacing, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Mikhael F El-Chami
- Department of Medicine, Division of Cardiology, Section of Electrophysiology and Pacing, Emory University School of Medicine, Atlanta, Georgia, USA
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Harms J, Schreibmann E, Mccall NS, Lloyd MS, Higgins KA, Castillo R. Cardiac motion and its dosimetric impact during radioablation for refractory ventricular tachycardia. J Appl Clin Med Phys 2023:e13925. [PMID: 36747376 DOI: 10.1002/acm2.13925] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Revised: 12/09/2022] [Accepted: 01/19/2023] [Indexed: 02/08/2023] Open
Abstract
INTRODUCTION Cardiac radioablation (CR) is a noninvasive treatment option for patients with refractory ventricular tachycardia (VT) during which high doses of radiation, typically 25 Gy, are delivered to myocardial scar. In this study, we investigate motion from cardiac cycle and evaluate the dosimetric impact in a cohort of patients treated with CR. METHODS This retrospective study included eight patients treated at our institution who had respiratory-correlated and ECG-gated 4DCT scans acquired within 2 weeks of CR. Deformable image registration was applied between maximum systole (SYS) and diastole (DIAS) CTs to assess cardiac motion. The average respiratory-correlated CT (AVGresp ) was deformably registered to the average cardiac (AVGcardiac ), SYS, and DIAS CTs, and contours were propagated using the deformation vector fields (DVFs). Finally, the original treatment plan was recalculated on the deformed AVGresp CT for dosimetric assessment. RESULTS Motion magnitudes were measured as the mean (SD) value over the DVFs within each structure. Displacement during the cardiac cycle for all chambers was 1.4 (0.9) mm medially/laterally (ML), 1.6 (1.0) mm anteriorly/posteriorly (AP), and 3.0 (2.8) mm superiorly/inferiorly (SI). Displacement for the 12 distinct clinical target volumes (CTVs) was 1.7 (1.5) mm ML, 2.4 (1.1) mm AP, and 2.1 (1.5) SI. Displacements between the AVGresp and AVGcardiac scans were 4.2 (2.0) mm SI and 5.8 (1.4) mm total. Dose recalculations showed that cardiac motion may impact dosimetry, with dose to 95% of the CTV dropping from 27.0 (1.3) Gy on the AVGresp to 20.5 (7.1) Gy as estimated on the AVGcardiac . CONCLUSIONS Cardiac CTV motion in this patient cohort is on average below 3 mm, location-dependent, and when not accounted for in treatment planning may impact target coverage. Further study is needed to assess the impact of cardiac motion on clinical outcomes.
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Affiliation(s)
- Joseph Harms
- Department of Radiation Oncology, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Eduard Schreibmann
- Department of Radiation Oncology, Winship Cancer Institute of Emory University, Atlanta, Georgia, USA
| | - Neal S Mccall
- Department of Radiation Oncology, Winship Cancer Institute of Emory University, Atlanta, Georgia, USA
| | - Michael S Lloyd
- Section of Clinical Cardiac Electrophysiology, Emory University, Atlanta, Georgia, USA
| | - Kristin A Higgins
- Department of Radiation Oncology, Winship Cancer Institute of Emory University, Atlanta, Georgia, USA
| | - Richard Castillo
- Department of Radiation Oncology, Winship Cancer Institute of Emory University, Atlanta, Georgia, USA
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Knijnik L, Lloyd MS. Treatment of arrhythmia disorders in the adult with congenital heart disease: A lesion-specific review. Kardiol Pol 2022; 80:1072-1083. [PMID: 36226762 DOI: 10.33963/kp.a2022.0235] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Indexed: 12/05/2022]
Abstract
There are now more adults living with a history of congenital heart disease than there are children. Modern electrophysiologists must familiarize themselves with the most common congenital lesions requiring electrophysiologic care as adults. Advancements in this field have been made most notably with high-resolution 3D imaging and electroanatomic mapping, left ventricular cannulation techniques, alternative pacing strategies, intracardiac echo, and transeptal access tools.
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Affiliation(s)
- Leonardo Knijnik
- Emory University Adult Congenital Heart Center, Atlanta, GA, United States
| | - Michael S Lloyd
- Emory University Adult Congenital Heart Center, Atlanta, GA, United States.
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30
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Kharbanda RK, Moore JP, Lloyd MS, Galotti R, Bogers AJJC, Taverne YJHJ, Madhavan M, McLeod CJ, Dubin AM, Mah DY, Chang PM, Kamp AN, Nielsen JC, Aydin A, Tanel RE, Shah MJ, Pilcher T, Evertz R, Khairy P, Tan RB, Czosek RJ, Shivkumar K, de Groot NMS. Cardiac Resynchronization Therapy for Adult Patients With a Failing Systemic Right Ventricle: A Multicenter Study. J Am Heart Assoc 2022; 11:e025121. [DOI: 10.1161/jaha.121.025121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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] [Indexed: 11/11/2022]
Abstract
Background
The objective of this international multicenter study was to investigate both early and late outcomes of cardiac resynchronization therapy (CRT) in patients with a systemic right ventricle (SRV) and to identify predictors for congestive heart failure readmissions and mortality.
Methods and Results
This retrospective international multicenter study included 13 centers. The study population comprised 80 adult patients with SRV (48.9% women) with a mean age of 45±14 (range, 18–77) years at initiation of CRT. Median follow‐up time was 4.1 (25th–75th percentile, 1.3–8.3) years. Underlying congenital heart disease consisted of congenitally corrected transposition of the great arteries and dextro‐transposition of the great arteries in 63 (78.8%) and 17 (21.3%) patients, respectively. CRT resulted in significant improvement in functional class (before CRT: III, 25th–75th percentile, II–III; after CRT: II, 25th–75th percentile, II–III;
P
=0.005) and QRS duration (before CRT: 176±27; after CRT: 150±24 milliseconds;
P
=0.003) in patients with pre‐CRT ventricular pacing who underwent an upgrade to a CRT device (n=49). These improvements persisted during long‐term follow‐up with a marginal but significant increase in SRV function (before CRT; 30%, 25th–75th percentile, 25–35; after CRT: 31%, 25th–75th percentile, 21–38;
P
=0.049). In contrast, no beneficial change in the above‐mentioned variables was observed in patients who underwent de novo CRT (n=31). A quarter of all patients were readmitted for heart failure during follow‐up, and mortality at latest follow‐up was 21.3%.
Conclusions
This international experience with CRT in patients with an SRV demonstrated that CRT in selected patients with SRV dysfunction and pacing‐induced dyssynchrony yielded consistent improvement in QRS duration and New York Heart Association functional status, with a marginal increase in SRV function.
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Affiliation(s)
- Rohit K. Kharbanda
- Department of Cardiology Erasmus MC, University Medical Center Rotterdam The Netherlands
- Department of Cardiothoracic Surgery Erasmus MC, University Medical Center Rotterdam The Netherlands
| | - Jeremy P. Moore
- Ahmanson/UCLA Adult Congenital Heart Disease Center Los Angeles CA
| | - Michael S. Lloyd
- Division of Cardiology, Department of Medicine Emory University School of Medicine Atlanta GA
| | - Robert Galotti
- Ahmanson/UCLA Adult Congenital Heart Disease Center Los Angeles CA
| | - Ad J. J. C. Bogers
- Department of Cardiothoracic Surgery Erasmus MC, University Medical Center Rotterdam The Netherlands
| | - Yannick J. H. J. Taverne
- Department of Cardiothoracic Surgery Erasmus MC, University Medical Center Rotterdam The Netherlands
| | - Malini Madhavan
- Department of Cardiovascular Diseases Mayo Clinic Rochester MN
| | | | - Anne M. Dubin
- Division of Pediatric Cardiology, Department of Pediatrics Stanford University School of Medicine Stanford CA
| | - Douglas Y. Mah
- Department of Cardiology Boston Children’s Hospital and Harvard Medical School Boston MA
| | - Philip M. Chang
- Congenital Heart Center University of Florida Health Gainesville FL
| | - Anna N. Kamp
- The Heart Center Nationwide Children’s Hospital Colombus OH
| | - Jens C. Nielsen
- Department of Clinical Medicine, Aarhus University and Department of Cardiology Aarhus University Hospital Aarhus Denmark
| | - Alper Aydin
- Division of Cardiology University of Ottawa Heart Institute Ottawa Canada
| | - Ronn E. Tanel
- Division of Pediatric Cardiology, UCSF Benioff Children’s Hospital University of California San Francisco CA
| | - Maully J. Shah
- Division of Cardiology Children’s Hospital of Philadelphia PA
| | - Thomas Pilcher
- Division of Pediatric Cardiology, Department of Internal Medicine University of Utah Salt Lake City UT
| | - Reinder Evertz
- Department of Cardiology Radboud University Medical Center Nijmegen The Netherlands
| | - Paul Khairy
- Electrophysiology Service and Adult Congenital Heart Center, Montreal Heart Institute Université de Montréal Montreal Quebec Canada
| | - Reina B. Tan
- Division of Pediatric Cardiology New York University Langone Medical Center New York NY
| | - Richard J. Czosek
- Division of Pediatric Cardiology Cincinnati Children’s Hospital Medical Center Cincinnati OH
| | | | - Natasja M. S. de Groot
- Department of Cardiology Erasmus MC, University Medical Center Rotterdam The Netherlands
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Moore JP, de Groot NMS, O'Connor M, Cortez D, Su J, Burrows A, Shannon KM, O'Leary ET, Shah M, Khairy P, Atallah J, Wong T, Lloyd MS, Taverne YJHJ, Dubin AM, Nielsen JC, Evertz R, Czosek RJ, Madhavan M, Chang PM, Aydin A, Cano Ó. Conduction System Pacing Versus Conventional Cardiac Resynchronization Therapy in Congenital Heart Disease. JACC Clin Electrophysiol 2022; 9:385-393. [PMID: 36752449 DOI: 10.1016/j.jacep.2022.10.012] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [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] [Received: 07/19/2022] [Revised: 10/03/2022] [Accepted: 10/05/2022] [Indexed: 12/03/2022]
Abstract
BACKGROUND Dyssynchrony-associated left ventricular systolic dysfunction is a major contributor to heart failure in congenital heart disease (CHD). Although conventional cardiac resynchronization therapy (CRT) has shown benefit, the comparative efficacy of cardiac conduction system pacing (CSP) is unknown. OBJECTIVES To compare the clinical outcomes of CSP vs conventional CRT in CHD with biventricular, systemic left ventricular anatomy. METHODS Retrospective CSP data from 7 centers were compared with propensity score-matched conventional CRT control subjects. Outcomes were lead performance, change in left ventricular ejection fraction (LVEF), and QRS duration at 12 months. RESULTS A total of 65 CSP cases were identified (mean age 37 ± 21 years, 46% men). The most common CHDs were tetralogy of Fallot (n = 12 [19%]) and ventricular septal defect (n = 12 [19%]). CSP was achieved after a mean of 2.5 ± 1.6 attempts per procedure (38 patients with left bundle branch pacing, 17 with HBP, 10 with left ventricular septal myocardial). Left bundle branch area pacing [LBBAP] vs HBP was associated with a smaller increase in pacing threshold (Δ pacing threshold 0.2 V vs 0.8 V; P = 0.05) and similar sensing parameters at follow-up. For 25 CSP cases and control subjects with baseline left ventricular systolic dysfunction, improvement in LVEF was non-inferior (Δ LVEF 9.0% vs 6.0%; P = 0.3; 95% confidence limits: -2.9% to 10.0%) and narrowing of QRS duration was more pronounced for CSP (Δ QRS duration 35 ms vs 14 ms; P = 0.04). Complications were similar (3 [12%] CSP, 4 [16%] conventional CRT; P = 1.00). CONCLUSIONS CSP can be reliably achieved in biventricular, systemic left ventricular CHD patients with similar improvement in LVEF and greater QRS narrowing for CSP vs conventional CRT at 1 year. Among CSP patients, pacing electrical parameters were superior for LBBAP vs HBP.
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Affiliation(s)
- Jeremy P Moore
- Division of Cardiology, Ahmanson/UCLA Adult Congenital Heart Disease Center, Department of Medicine, University of California Los Angeles Medical Center, Los Angeles, California, USA; Cardiac Arrhythmia Center, UCLA Health System, David Geffen School of Medicine, University of California-Los Angeles, Los Angeles, California, USA; Division of Cardiology, Department of Pediatrics, UCLA Medical Center, Los Angeles, California, USA.
| | | | - Matthew O'Connor
- Royal Brompton Hospital, Guy's and St. Thomas' NHS Foundation Trust, London, United Kingdom
| | - Daniel Cortez
- Adult Congenital Cardiology and Pediatric Cardiology, University of Minnesota, Minneapolis, Minnesota, USA; Adult Congenital Cardiology and Pediatric Cardiology, UC Davis Medical Center, Sacramento, California, USA
| | - Jonathan Su
- Division of Cardiology, Department of Pediatrics, UCLA Medical Center, Los Angeles, California, USA
| | - Austin Burrows
- David Geffen School of Medicine, University of California-Los Angeles, Los Angeles, California, USA
| | - Kevin M Shannon
- Division of Cardiology, Ahmanson/UCLA Adult Congenital Heart Disease Center, Department of Medicine, University of California Los Angeles Medical Center, Los Angeles, California, USA; Cardiac Arrhythmia Center, UCLA Health System, David Geffen School of Medicine, University of California-Los Angeles, Los Angeles, California, USA; Division of Cardiology, Department of Pediatrics, UCLA Medical Center, Los Angeles, California, USA
| | - Edward T O'Leary
- Department of Cardiology, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts
| | - Maully Shah
- Department of Pediatrics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Paul Khairy
- Montreal Heart Institute, Université de Montréal, Montreal, Quebec, Canada
| | - Joseph Atallah
- Department of Pediatrics, Stollery Children's Hospital, University of Alberta, Edmonton, Alberta, Canada
| | - Tom Wong
- Royal Brompton Hospital, Guy's and St. Thomas' NHS Foundation Trust, London, United Kingdom
| | - Michael S Lloyd
- Division of Cardiology, Department of Medicine, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Yannick J H J Taverne
- Department of Cardiothoracic Surgery, Erasmus Medical Center, University Medical Center, Rotterdam, the Netherlands
| | - Anne M Dubin
- Division of Pediatric Cardiology, Department of Pediatrics, Stanford University School of Medicine, Palo Alto, California, USA
| | - Jens C Nielsen
- Department of Clinical Medicine, Aarhus University, Aarhus, Denmark; Department of Cardiology, Aarhus University Hospital, Aarhus, Denmark
| | - Reinder Evertz
- Department of Cardiology, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Richard J Czosek
- Heart Institute, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA; Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
| | - Malini Madhavan
- Department of Cardiovascular Diseases, Mayo Clinic, Rochester, Minnesota, USA
| | - Philip M Chang
- Department of Pediatrics, Children's Mercy Hospital, Kansas City, Missouri, USA
| | - Alper Aydin
- Division of Cardiology, University of Ottawa Heart Institute, Ottawa, Ontario, Canada
| | - Óscar Cano
- Área de Enfermedades Cardiovasculares, Hospital Universitari i Politècnic La Fe, Centro de Investigaciones Biomédicas en RED en Enfermedades Cardiovasculares, Valencia, Spain
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Kiani S, Eggebeen J, El-Chami MF, Shah AD, Westerman SB, De Lurgio DB, Merchant FM, Bhatia NK, Leon AR, Lloyd MS. Percutaneous Vascular Closure Compared With Manual Compression in Atrial Fibrillation Ablation. JACC Clin Electrophysiol 2022; 8:803-805. [PMID: 35738860 DOI: 10.1016/j.jacep.2022.02.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2022] [Revised: 02/23/2022] [Accepted: 02/25/2022] [Indexed: 11/29/2022]
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Momin S, Lei Y, McCall NS, Zhang J, Roper J, Harms J, Tian S, Lloyd MS, Liu T, Bradley JD, Higgins K, Yang X. Mutual enhancing learning-based automatic segmentation of CT cardiac substructure. Phys Med Biol 2022; 67. [PMID: 35447610 PMCID: PMC9148580 DOI: 10.1088/1361-6560/ac692d] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Accepted: 04/21/2022] [Indexed: 11/12/2022]
Abstract
Abstract
Objective. Current segmentation practice for thoracic cancer RT considers the whole heart as a single organ despite increased risks of cardiac toxicities from irradiation of specific cardiac substructures. Segmenting up to 15 different cardiac substructures can be a very time-intensive process, especially due to their different volume sizes and anatomical variations amongst different patients. In this work, a new deep learning (DL)-based mutual enhancing strategy is introduced for accurate and automatic segmentation, especially of smaller substructures such as coronary arteries. Approach. Our proposed method consists of three subnetworks: retina U-net, classification module, and segmentation module. Retina U-net is used as a backbone network architecture that aims to learn deep features from the whole heart. Whole heart feature maps from retina U-net are then transferred to four different sets of classification modules to generate classification localization maps of coronary arteries, great vessels, chambers of the heart, and valves of the heart. Each classification module is in sync with its corresponding subsequent segmentation module in a bootstrapping manner, allowing them to share their encoding paths to generate a mutual enhancing strategy. We evaluated our method on three different datasets: institutional CT datasets (55 subjects) 2) publicly available Multi-Modality Whole Heart Segmentation (MM-WHS) challenge datasets (120 subjects), and Automated Cardiac Diagnosis Challenge (ACDC) datasets (100 subjects). For institutional datasets, we performed five-fold cross-validation on training data (45 subjects) and performed inference on separate hold-out data (10 subjects). For each subject, 15 cardiac substructures were manually contoured by a resident physician and evaluated by an attending radiation oncologist. For the MM-WHS dataset, we trained the network on 100 datasets and performed an inference on a separate hold-out dataset with 20 subjects, each with 7 cardiac substructures. For ACDC datasets, we performed five-fold cross-validation on 100 datasets, each with 3 cardiac substructures. We compared the proposed method against four different network architectures: 3D U-net, mask R-CNN, mask scoring R-CNN, and proposed network without classification module. Segmentation accuracies were statistically compared through dice similarity coefficient, Jaccard, 95% Hausdorff distance, mean surface distance, root mean square distance, center of mass distance, and volume difference. Main results. The proposed method generated cardiac substructure segmentations with significantly higher accuracy (P < 0.05) for small substructures, especially for coronary arteries such as left anterior descending artery (CA-LADA) and right coronary artery (CA-RCA) in comparison to four competing methods. For large substructures (i.e. chambers of the heart), our method yielded comparable results to mask scoring R-CNN method, resulting in significantly (P < 0.05) improved segmentation accuracy in comparison to 3D U-net and mask R-CNN. Significance. A new DL-based mutual enhancing strategy was introduced for automatic segmentation of cardiac substructures. Overall results of this work demonstrate the ability of the proposed method to improve segmentation accuracies of smaller substructures such as coronary arteries without largely compromising the segmentation accuracies of larger substructures. Fast and accurate segmentations of up to 15 substructures can possibly be used as a tool to rapidly generate substructure segmentations followed by physicians’ reviews to improve clinical workflow.
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Bhatia NK, Merchant FM, Lloyd MS, El-Chami MF, Iravanian S, Kim TY, Burke M, Uzelac I, Cherry E, Cho HC, Shah AD, Chionuma H, Fenton FH. PO-705-01 ACTION POTENTIAL RESTITUTION CURVES OBTAINED FROM FULL EXPLANTED HUMAN HEARTS. Heart Rhythm 2022. [DOI: 10.1016/j.hrthm.2022.03.1072] [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: 11/04/2022]
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Kim J, Black G, perdoncin E, Shekiladze N, Gleason P, Grubb K, Devireddy C, Bhatia NK, Merchant FM, El-Chami MF, Westerman SB, Shah AD, Leon AR, Lloyd MS, Kiani S. PO-620-06 VALIDATION OF RISK SCORE PREDICTING NEED FOR PACEMAKER IMPLANT AFTER TRANSCATHETER AORTIC VALVE REPLACEMENT. Heart Rhythm 2022. [DOI: 10.1016/j.hrthm.2022.03.833] [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: 11/25/2022]
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Shanafelt C, Middour TG, El-Chami MF, Kiani S, Lloyd MS, Merchant FM, Shah AD, Westerman SB, Bhatia NK. PO-621-02 EXTRACTION OF LEADS ACROSS THE TRICUSPID VALVE DOES NOT SIGNIFICANTLY ALTER TRICUSPID VALVE REGURGITATION. Heart Rhythm 2022. [DOI: 10.1016/j.hrthm.2022.03.837] [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: 11/04/2022]
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Iravanian S, Uzelac I, Bhatia NK, Kim TY, Cherry EM, Chionuma H, Cho HC, Shah AD, Burke M, El-Chami MF, Lloyd MS, Merchant FM, Chionuma H, Fenton FH. PO-616-06 THE SPATIOTEMPORAL ORGANIZATION OF VENTRICULAR FIBRILLATION (VF) IN EXPLANTED HUMAN HEARTS. Heart Rhythm 2022. [DOI: 10.1016/j.hrthm.2022.03.802] [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: 11/30/2022]
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Wight J, Bigham T, Schwartz A, Zahid AT, Bhatia N, Kiani S, Shah A, Westerman S, Higgins K, Lloyd MS. Long Term Follow-Up of Stereotactic Body Radiation Therapy for Refractory Ventricular Tachycardia in Advanced Heart Failure Patients. Front Cardiovasc Med 2022; 9:849113. [PMID: 35571173 PMCID: PMC9098944 DOI: 10.3389/fcvm.2022.849113] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [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: 01/05/2022] [Accepted: 04/06/2022] [Indexed: 12/31/2022] Open
Abstract
Background Initial studies of stereotactic body radiation therapy (SBRT) for refractory ventricular tachycardia (VT) have demonstrated impressive efficacy. Follow-up analyses have found mixed results and the role of SBRT for refractory VT remains unclear. We performed palliative, cardiac radio ablation in patients with ventricular tachycardia refractory to ablation and medical management. Methods Arrhythmogenic regions were targeted by combining computed tomography imaging with electrophysiologic mapping with collaboration from a radiation oncologist, electrophysiologist and cardiac imaging specialist. Patients were treated with a single fraction 25 Gy. Total durations of VT, the quantity of antitachycardia pacing (ATP) and shocks before and after treatment as recorded by implantable cardioverter-defibrillators (ICDs) were analyzed. Follow-up extended until most recent device interrogation unless transplant, death or repeat ablation occurred sooner. Results Fourteen patients (age 50–78, four females) were treated and had an average of two prior ablations. Nine had ACC/AHA Stage D heart failure and three had left ventricular assist devices (LVAD). Two patients died shortly after SBRT, one received a prompt heart transplant and another had significant VT durations in the following months that were inaccurately recorded by their device. Ten of the 14 patients remained with adequate data post SBRT for analysis with an average follow-up duration of 216 days. Seven of those 10 patients had a decrease in VT post SBRT. Comparing the 90 days before treatment to cumulative follow-up, patients had a 59% reduction in VT, 39% reduction in ATP and a 60% reduction in shocks. Four patients received repeat ablation following SBRT. Pneumonitis was the only complication, occurring in four of the fourteen patients. Conclusion SBRT may have value in advanced heart failure patients with refractory VT acutely but the utility over long-term follow-up appears modest. Prospective randomized data is needed to better clarify the role of SBRT in managing refractory VT.
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Affiliation(s)
- John Wight
- School of Medicine, Emory University, Atlanta, GA, United States
- *Correspondence: John Wight,
| | - Thomas Bigham
- School of Medicine, Emory University, Atlanta, GA, United States
| | - Arielle Schwartz
- School of Medicine, Emory University, Atlanta, GA, United States
| | | | - Neal Bhatia
- Section of Cardiac Electrophysiology, Emory University, Atlanta, GA, United States
| | - Soroosh Kiani
- Section of Cardiac Electrophysiology, Emory University, Atlanta, GA, United States
| | - Anand Shah
- Section of Cardiac Electrophysiology, Emory University, Atlanta, GA, United States
| | - Stacy Westerman
- Section of Cardiac Electrophysiology, Emory University, Atlanta, GA, United States
| | - Kristin Higgins
- Department of Radiation Oncology, Emory University, Atlanta, GA, United States
| | - Michael S. Lloyd
- Section of Cardiac Electrophysiology, Emory University, Atlanta, GA, United States
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Donnelly J, Gabriels J, Bhatia NK, Lloyd MS, El-Chami MF, Merchant FM. Diagnostic Pacing Maneuvers for Supraventricular Tachycardia Discrimination: a Taxonomic Approach. Curr Treat Options Cardio Med 2022. [DOI: 10.1007/s11936-022-00961-6] [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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T Brown M, M Pelling M, Kiani S, M Merchant F, F El-Chami M, R Leon A, Westerman S, Shah A, Wise D, S Lloyd M. Same-Day Versus Next-Day Discharge Strategies for Left Atrial Ablation Procedures: A Parallel, Intra-Institutional Comparison of Safety and Feasibility. J Atr Fibrillation 2021; 13:2466. [PMID: 34950339 DOI: 10.4022/jafib.2466] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2020] [Revised: 12/29/2020] [Accepted: 01/25/2021] [Indexed: 11/10/2022]
Abstract
Background Head-to-head comparative data for the postoperative care of patients undergoing left atrial ablation procedures are lacking. Objective We sought to investigate complication and readmission rates between patients undergoing same-day (SD) or next-day (ND) discharges for ablative procedures in the left atrium, primarily atrial fibrillation (AF). Methods Two electrophysiology centers simultaneously perform left atrial ablations with differing discharge strategies. We identified all patients who underwent left atrial ablation from August 2017 to August 2019 (n = 409) undergoing either SD (n = 210) or ND (n = 199) discharge protocols. We analyzed any clinical events that resulted in procedural abortion, extended hospitalization, or readmission within 72 hours. Results The primary endpoint of complication and readmission rate was similar between SD and ND discharge (14.3% vs 12.6%, p = 0.665). Rates of complications categorized as major (2.4% vs 3.0%, p = 0. 776) and minor (11.9% vs 9.5%, p = 0.524) were also similar.Multivariable regression modeling revealed no significant correlation between discharge strategy and complication/readmission occurrence (OR 1.565 [0.754 - 3.248], p = 0.23), but a positive association of hypertension and procedure duration (OR 3.428 [1.436 - 8.184], p = 0.006) and (OR 1.01 [1 - 1.019], p = 0.046) respectively. Conclusions Left atrial ablation complication and readmission rates were similar between SD and ND discharge practices. Hypertension and procedural duration were associated with increased complication rates irrespective of discharge strategy. These data, which represent the first side-by-side comparison of discharge strategy, suggests same-day discharge is safe and feasible for left atrial ablation procedures.
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Wight JA, Bigham TE, Hanson PR, Zahid A, Iravanian S, Perkins PE, Lloyd MS. Hands-on defibrillation with safety drapes: Analysis of compressions and an alternate current pathway. Am J Emerg Med 2021; 52:132-136. [PMID: 34922232 DOI: 10.1016/j.ajem.2021.11.044] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Revised: 11/26/2021] [Accepted: 11/28/2021] [Indexed: 11/28/2022] Open
Abstract
BACKGROUND Hands-on defibrillation (HOD) could theoretically improve the efficacy of cardiopulmonary resuscitation (CPR) though a few mechanisms. Polyethylene drapes could potentially facilitate safe HOD, but questions remain about the effects of CPR on polyethylene's conductance and the magnitude of current looping through rescuers' arms in contact with patients. METHODS This study measured the leakage current through 2 mil (0.002 in.) polyethylene through two different current pathways before and after 30 min of continuous compressions on a CPR mannequin. The two pathways analyzed were the standardized IEC (International Electrotechnical Commission) leakage current analysis and a setup analyzing a current pathway looping through a rescuer's arms and returning to the patient. First, ten measurements involving the two pathways were obtained on a single polyethylene drape. 30 min of continuous compressions were applied to the drape on a CPR mannequin after which the ten measurements were repeated. RESULTS Twenty patients undergoing elective cardioversion for atrial fibrillation (18/20) or atrial flutter (2/20) at Emory University Hospital underwent analysis all receiving 200 J shocks (age 38-101, 35% female). Through the IEC measurement method the peak leakage current mean was 0.70 +/- 0.02 mA before compressions and 0.59 +/- 0.19 mA after compressions. Only three of the ten measurements assessing current passing through a rescuer's arms had detectable current and each was of low magnitude. All measurements were well below the maximum IEC recommendations of 3.5 mA RMS and 5.0 mA peak. CONCLUSIONS Polyethylene may facilitate safe HOD even after long durations of compressions. Current looping through a rescuer's arms is likely of insignificant magnitude.
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Blank E, Shah AD, Rosenblum JM, Lloyd MS. "Valve-sparing" transvenous defibrillator systems after tricuspid valve intervention. Heart Rhythm 2021; 18:2212-2214. [PMID: 34583059 DOI: 10.1016/j.hrthm.2021.09.024] [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] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Revised: 09/13/2021] [Accepted: 09/20/2021] [Indexed: 11/15/2022]
Affiliation(s)
- Evan Blank
- Emory University School of Medicine, Atlanta, Georgia
| | - Anand D Shah
- Emory University School of Medicine, Atlanta, Georgia
| | - Joshua M Rosenblum
- Emory University Department of Cardiothoracic Surgery, Atlanta, Georgia; Emory Adult Congenital Heart Center, Atlanta, Georgia
| | - Michael S Lloyd
- Emory University School of Medicine, Atlanta, Georgia; Emory Adult Congenital Heart Center, Atlanta, Georgia.
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Merchant FM, Larson J, Darghosian L, Smith P, Kiani S, Westerman S, Shah AD, Hirsh DS, Lloyd MS, Leon AR, El-Chami MF. Prospective evaluation of health status, quality of life and clinical outcomes following implantable defibrillator generator exchange. J Geriatr Cardiol 2021; 18:720-727. [PMID: 34659378 PMCID: PMC8501388 DOI: 10.11909/j.issn.1671-5411.2021.09.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2023] Open
Abstract
BACKGROUND Little is known about health status and quality of life (QoL) after implantable cardioverter-defibrillator (ICD) generator exchange (GE). METHODS We prospectively followed patients undergoing first-time ICD GE. Serial assessments of health status were performed by administering the 36-Item Short Form Survey (SF-36). RESULTS Mean age was 67.5 ± 14.3 years, left ventricle ejection fraction (LVEF) was 36.5% ± 15.0% and over 40% of the cohort had improved LVEF to > 35% at the time of GE. SF-36 scores were significantly worse in physical/general health domains compared to domains of emotional/social well-being ( P < 0.001 for each comparison). Physical health scores were significantly worse among those with medical comorbidities including diabetes, chronic obstructive pulmonary disease and atrial fibrillation. Mean follow-up was 1.6 ± 0.5 years after GE. Overall SF-36 scores remained stable across all domains during follow-up. Survival at 3 years post-GE was estimated at 80%. Five patients died during follow-up and most deaths were adjudicated as non-arrhythmic in origin. Four patients experienced appropriate ICD shocks after GE, three of whom had LVEF which remains impaired LVEF (i.e., < 35%) at the time of GE. CONCLUSION Patients undergoing ICD GE have significantly worse physical health compared to emotional/social well-being, which is associated with the presence of medical comorbidities. In terms of clinical outcomes, the incidence of appropriate shocks after GE among those with improvement in LVEF is very low, and most deaths post-procedure appear to be non-arrhythmic in origin. These data represent an attempt to more fully characterize the spectrum of QoL and clinical outcomes after GE.
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Affiliation(s)
- Faisal M Merchant
- Section of Cardiac Electrophysiology, Emory University School of Medicine, Atlanta, GA, USA
| | - John Larson
- Department of Medicine, University of Michigan School of Medicine, Ann Arbor, MI, USA
| | - Leon Darghosian
- Section of Cardiac Electrophysiology, Emory University School of Medicine, Atlanta, GA, USA
| | - Paige Smith
- Section of Cardiac Electrophysiology, Emory University School of Medicine, Atlanta, GA, USA
| | - Soroosh Kiani
- Section of Cardiac Electrophysiology, Emory University School of Medicine, Atlanta, GA, USA
| | - Stacy Westerman
- Section of Cardiac Electrophysiology, Emory University School of Medicine, Atlanta, GA, USA
| | - Anand D. Shah
- Section of Cardiac Electrophysiology, Emory University School of Medicine, Atlanta, GA, USA
| | - David S. Hirsh
- Section of Cardiac Electrophysiology, Emory University School of Medicine, Atlanta, GA, USA
- Grady Health System, Atlanta, GA, USA
| | - Michael S. Lloyd
- Section of Cardiac Electrophysiology, Emory University School of Medicine, Atlanta, GA, USA
| | - Angel R. Leon
- Section of Cardiac Electrophysiology, Emory University School of Medicine, Atlanta, GA, USA
| | - Mikhael F. El-Chami
- Section of Cardiac Electrophysiology, Emory University School of Medicine, Atlanta, GA, USA
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Wight JA, Schwartz A, Bigham T, Higgins K, Lloyd MS. B-PO02-134 LONG TERM FOLLOW-UP OF STEREOTACTIC BODY RADIATION THERAPY FOR REFRACTORY VENTRICULAR TACHYCARDIA. Heart Rhythm 2021. [DOI: 10.1016/j.hrthm.2021.06.474] [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: 11/29/2022]
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Wang SZ, Kumar Bhatia N, Merchant FM, Leon AR, Lloyd MS, Westerman SB, Shah AD, Kiani S, Patel AM, De Lurgio DB, Tompkins C, El-Chami MF. B-PO01-036 CARDIAC IMPLANTABLE TRANSVENOUS LEAD PERFORATION: INCIDENCE, OUTCOMES AND MANAGEMENT-IS LEAD REVISION NECESSARY? Heart Rhythm 2021. [DOI: 10.1016/j.hrthm.2021.06.182] [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: 11/26/2022]
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Lloyd MS. Enhanced detection of atrial arrhythmias by implantable monitors: Have we found what we are looking for? J Cardiovasc Electrophysiol 2021; 32:2544-2545. [PMID: 34270149 DOI: 10.1111/jce.15173] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Accepted: 07/12/2021] [Indexed: 11/28/2022]
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Kiani S, Wallace K, Stromberg K, Piccini JP, Roberts PR, El-Chami MF, Soejima K, Garweg C, Fagan DH, Lloyd MS. A Predictive Model for the Long-Term Electrical Performance of a Leadless Transcatheter Pacemaker. JACC Clin Electrophysiol 2020; 7:502-512. [PMID: 33358666 DOI: 10.1016/j.jacep.2020.09.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 09/08/2020] [Accepted: 09/08/2020] [Indexed: 10/22/2022]
Abstract
OBJECTIVES This study sought to formulate a predictive model for describing the long-term electrical performance of Micra (Medtronic, Mounds View, Minnesota). BACKGROUND The Micra leadless pacemaker is an alternative ventricular pacing option that avoids the pitfalls of transvenous leads. However, well-defined metrics to predict the long-term electrical performance of the device are lacking. METHODS We identified all patients who underwent successful Micra implantation enrolled in the investigational device exemption study, continued access study, or post-approval registry with complete 1-year post-implantation data or system revision due to elevated thresholds (N = 1,843). The analysis endpoint was an elevated pacing capture threshold (PCT) at ≥12 months post-implantation, defined as ≥2.0 V at 0.24 ms or an increase of ≥1.5 V from implantation or need for system revision due to elevated thresholds at ≤12 months post-implantation. We evaluated for univariate and multivariate associations between patient and device characteristics at implantation and for elevated thresholds at 12 months. RESULTS Among the total cohort, 75 patients (4.1%) had elevated thresholds at 12 months; of these, 13 required system revisions. Predictors associated with elevated thresholds in univariate analysis included the total number of deployments (excluded from the multivariable model), impedance and PCT at implantation, male sex, history of diabetes, and ischemic cardiomyopathy. Multivariable regression modeling found that male sex, history of diabetes, implantation PCT of ≥2 V, and impedance of <800 Ω were independent predictors of elevated PCT at 12 months (all p < 0.05). CONCLUSION A history of diabetes, male sex, elevated PCT, and low impedance at implantation were independent predictors of elevated thresholds at 12 months. These metrics represent the foundation of a simple tool to aid in procedural decision making.
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Affiliation(s)
- Soroosh Kiani
- Department of Internal Medicine, Division of Cardiology, Section of Cardiac Electrophysiology and Pacing, Emory University School of Medicine, Atlanta, Georgia, USA.
| | | | | | - Jonathan P Piccini
- Duke University Medical Center and Duke Clinical Research Institute, Durham, North Carolina, USA
| | - Paul R Roberts
- Southampton General Hospital-University Hospital Southampton National Health Service Foundation Trust, Southampton, United Kingdom
| | - Mikhael F El-Chami
- Department of Internal Medicine, Division of Cardiology, Section of Cardiac Electrophysiology and Pacing, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Kyoko Soejima
- Department of Cardiology, Kyorin University School of Medicine, Tokyo, Japan
| | - Christophe Garweg
- Department of Cardiovascular Sciences, University of Leuven, Leuven, Belgium
| | | | - Michael S Lloyd
- Department of Internal Medicine, Division of Cardiology, Section of Cardiac Electrophysiology and Pacing, Emory University School of Medicine, Atlanta, Georgia, USA
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Bhatia NK, Kiani S, Merchant FM, Delurgio DB, Patel AM, Leon AR, Lloyd MS, Westerman SB, Shah AD, El-Chami MF. Life cycle management of Micra transcatheter pacing system: Data from a high-volume center. J Cardiovasc Electrophysiol 2020; 32:484-490. [PMID: 33251698 DOI: 10.1111/jce.14825] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [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: 07/05/2020] [Revised: 11/09/2020] [Accepted: 11/22/2020] [Indexed: 01/07/2023]
Abstract
BACKGROUND Data on the management of Micra transcatheter pacing system (TPS) at the time of an upgrade or during battery depletion is limited. OBJECTIVE We sought to evaluate the management patterns of patients implanted with a Micra TPS during long-term follow-up. METHODS We retrospectively identified patients who underwent Micra implantation from April 2014 to November 2019. We identified patients who underwent extraction (n = 11) or had an abandoned Micra (n = 12). RESULTS We identified 302 patients who received a Micra during the period of the study. Mean age was 72.7 ± 15.4 years, 54.6% were men, and left ventricular ejection fraction was 51.9 ± 5.2%. Mean follow-up was 1105.5 ± 529.3 days. Procedural complications included pericardial tamponade (n = 1) treated with pericardiocentesis, significant rise in thresholds (n = 6) treated with reimplantation (n = 4), and major groin complications (n = 2). Indications for extraction included an upgrade to cardiac resynchronization therapy (CRT) device (n = 3), bridging after extraction of an infected transvenous system (n = 3), elevated thresholds (n = 3), and non-Micra-related bacteremia (n = 2). The median time from implantation to extraction was 78 days (interquartile range: 14-113 days), with the longest extraction occurring at 1442 days. All extractions were successful, with no procedural or long-term complications. Indications for abandonment included the need for CRT (n = 6), battery depletion (n = 2), increasing thresholds/failure to capture (n = 3), and pacemaker syndrome (n = 1). All procedures were successful, with no procedural or long-term complications. CONCLUSION In this large single-center study, 6% of patients implanted with a Micra required a system modification during long-term follow-up, most commonly due to the requirement for CRT pacing. These patients were managed successfully with extraction or abandonment.
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Affiliation(s)
- Neal K Bhatia
- Section of Electrophysiology, Division of Cardiology, Emory University, Atlanta, Georgia, USA
| | - Soroosh Kiani
- Section of Electrophysiology, Division of Cardiology, Emory University, Atlanta, Georgia, USA
| | - Faisal M Merchant
- Section of Electrophysiology, Division of Cardiology, Emory University, Atlanta, Georgia, USA
| | - David B Delurgio
- Section of Electrophysiology, Division of Cardiology, Emory University, Atlanta, Georgia, USA
| | - Anshul M Patel
- Section of Electrophysiology, Division of Cardiology, Emory University, Atlanta, Georgia, USA
| | - Angel R Leon
- Section of Electrophysiology, Division of Cardiology, Emory University, Atlanta, Georgia, USA
| | - Michael S Lloyd
- Section of Electrophysiology, Division of Cardiology, Emory University, Atlanta, Georgia, USA
| | - Stacy B Westerman
- Section of Electrophysiology, Division of Cardiology, Emory University, Atlanta, Georgia, USA
| | - Anand D Shah
- Section of Electrophysiology, Division of Cardiology, Emory University, Atlanta, Georgia, USA
| | - Mikhael F El-Chami
- Section of Electrophysiology, Division of Cardiology, Emory University, Atlanta, Georgia, USA
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Houmsse M, Karki R, Gabriels J, Reinig M, Patel D, Hussain SK, Gandhi GD, Lloyd MS, Makary MS, Okabe T, Tamirisa K, Joza J, Patel A, Afzal MR, Epstein LM, Cha Y. Implantation of leadless pacemakers via inferior vena cava filters is feasible and safe: Insights from a multicenter experience. J Cardiovasc Electrophysiol 2020; 31:3277-3285. [DOI: 10.1111/jce.14776] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [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: 07/11/2020] [Revised: 09/03/2020] [Accepted: 09/10/2020] [Indexed: 12/15/2022]
Affiliation(s)
- Mahmoud Houmsse
- Division of Cardiovascular Medicine, Department of Internal Medicine, Wexner Medical Center The Ohio State University Columbus Ohio USA
| | - Roshan Karki
- Department of Cardiovascular Medicine Mayo Clinic Rochester Minnesota USA
| | - James Gabriels
- Department of Cardiology Northwell Health, Manhasset, NY/Long Island Jewish Medical Center New Hyde Park New York USA
| | | | | | - Sarah K. Hussain
- Division of Cardiology Penn State Health Milton S Hershey Medical Center Hershey Pennsylvania USA
| | | | - Michael S. Lloyd
- Division of Cardiology, Department of Medicine Emory University Atlanta Georgia USA
| | - Mina S. Makary
- Division of Cardiovascular Medicine, Department of Internal Medicine, Wexner Medical Center The Ohio State University Columbus Ohio USA
| | - Toshimasa Okabe
- Division of Cardiovascular Medicine, Department of Internal Medicine, Wexner Medical Center The Ohio State University Columbus Ohio USA
| | | | - Jacqueline Joza
- Division of Cardiology McGill University Health Center Montreal Canada
| | - Apoor Patel
- Department of Cardiology Northwell Health, Manhasset, NY/Long Island Jewish Medical Center New Hyde Park New York USA
| | - Muhammad R. Afzal
- Division of Cardiovascular Medicine, Department of Internal Medicine, Wexner Medical Center The Ohio State University Columbus Ohio USA
| | - Laurence M. Epstein
- Department of Cardiology Northwell Health, Manhasset, NY/Long Island Jewish Medical Center New Hyde Park New York USA
| | - Yong‐Mei Cha
- Department of Cardiovascular Medicine Mayo Clinic Rochester Minnesota USA
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