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Kawada S, Nishii N, Mizuno T, Miyamoto M, Nakagawa K, Morita H. Management of sensing issues with a subcutaneous implantable cardioverter-defibrillator in a patient with Brugada syndrome: A case report. HeartRhythm Case Rep 2023; 9:878-882. [PMID: 38204842 PMCID: PMC10774532 DOI: 10.1016/j.hrcr.2023.09.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2024] Open
Affiliation(s)
- Satoshi Kawada
- Department of Cardiovascular Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Nobuhiro Nishii
- Department of Cardiovascular Therapeutics, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Tomofumi Mizuno
- Department of Cardiovascular Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Masakazu Miyamoto
- Department of Cardiovascular Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Koji Nakagawa
- Department of Cardiovascular Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Hiroshi Morita
- Department of Cardiovascular Therapeutics, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
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Uzunoglu EC, Liu K, Adrover P, Suryanarayana PG, Elayi CS, Catanzaro JN. Vector Configuration Screening Failure After Defibrillation Threshold Testing: Should we be concerned? HeartRhythm Case Rep 2023. [DOI: 10.1016/j.hrcr.2023.03.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/31/2023] Open
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Omura A, Onuki T, Mase H, Kurata M, Wakatsuki D, Suzuki H. A case of frequent and inappropriate shock with a subcutaneous implantable cardioverter defibrillator triggered by newly developed complete right bundle branch block. HeartRhythm Case Rep 2022; 8:606-609. [PMID: 36147711 PMCID: PMC9485661 DOI: 10.1016/j.hrcr.2022.05.025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Affiliation(s)
| | - Tatsuya Onuki
- Address reprint requests and correspondence: Dr Tatsuya Onuki, Department of Cardiology, Showa University Fujigaoka Hospital, 1-30 Fujigaoka, Aoba-ku, Yokohama, Kanagawa 227-8501, Japan.
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Shan HH, Chen HF, Ni Y, Yang JX, Zhou XL. Effects of Stellate Ganglion Block Through Different Approaches Under Guidance of Ultrasound. Front Surg 2022; 8:797793. [PMID: 35111806 PMCID: PMC8801483 DOI: 10.3389/fsurg.2021.797793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Accepted: 12/17/2021] [Indexed: 11/13/2022] Open
Abstract
ObjectiveThis study aimed to investigate the effects of stellate ganglion block (SGB) through different approaches under guidance of ultrasound.MethodsA total of 130 patients undergoing SGB in our hospital between February 2019 and February 2020 were enrolled as the research subjects. According to the random number table method, these subjects were divided into two groups: a modified 6th cervical vertebra (C6) group (n = 65) and a 7th cervical vertebra (C7) group (n = 65). Under the guidance of ultrasound, the subjects in the modified C6 group were punctured at the level of the C6 transverse process, and the subjects in the C7 group were punctured at the level of the C7 transverse process. The operation duration, number of puncture angle adjustments, block effects, and adverse reactions for SGB were compared between the two groups.ResultsThe modified C6 group showed shorter SGB operation duration and a lower number of puncture angle adjustments than the C7 group, and the differences were statistically significant (P < 0.05). Horner Syndrome occurred in both groups after SGB. The incidence of adverse reactions in the modified C6 group was 4.62%, comprising 1 case of hoarseness and 2 cases of slowed pulse, while that in the C7 group was 6.15%, with 1 case of hoarseness and 3 cases of slowed pulse; the difference between the two groups was not statistically significant (P > 0.05).ConclusionThe operation duration for modified SGB guided by ultrasound puncturing at the C6 transverse process is shorter and requires fewer puncture angle adjustments than puncturing at the C7 transverse process; however, there is no significant difference between the incidence of adverse reactions or the blocking effects of the two methods.
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Tsutsui K, Kato R, Asano S, Ikeda Y, Mori H, Tawara M, Tanaka S, Hasegawa S, Nakano S, Iwanaga S, Muramatsu T, Matsumoto K. Myopotential Oversensing Is a Major Cause of Inappropriate Shock in Subcutaneous Implantable Defibrillator in Japan. Int Heart J 2020; 61:913-921. [PMID: 32921668 DOI: 10.1536/ihj.20-129] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Previous study has identified marked differences in patient characteristics and causes of inappropriate shock (IAS) between Japan and the Western societies in terms of subcutaneous implantable cardioverter-defibrillator (S-ICD). However, evidence of IAS in Asian populations including Japan has been limited to one observational study.Thus, we conducted a single-center registry study that tracks the postoperative course of 61 consecutive patients who received S-ICD from February 2016 to January 2020. Our findings showed that IAS occurred in 9.8% of the study population (6/61), which is comparable to the previously reported incidence. Remarkably, T-wave oversensing did not result in an IAS (0/6). Instead, myopotential oversensing was determined to have caused the most IAS events (4/6), while atrial fibrillation ranked second (2/6). A provocation maneuver (e.g., abdominal clench, push-ups, lifting a heavy item) reproduced myopotential noise disguised as R-waves, which should potentially trigger an IAS if uninterrupted. R-wave amplitude of the IAS group appeared relatively low compared to that of the non-IAS group although this finding was not tested significant. Furthermore, no temporal changes were noted in R-wave amplitude between the time of implantation and IAS events, suggesting that it is neither constantly low nor acutely dropped R-wave amplitude but a relatively high noise level that drives IAS. All the myopotential-IAS patients were found to be male. Right-sided lead implantation was associated with a higher incidence of IAS.This study highlights the fact that IAS continues to occur due to myopotential noise oversensing instead of T-wave oversensing. To minimize the risk of IAS, it is desirable to search and secure high R-wave voltage.
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Affiliation(s)
- Kenta Tsutsui
- Department of Cardiovascular Medicine, Saitama International Medical Center, Faculty of Medicine, Saitama Medical University
| | - Ritsushi Kato
- Department of Cardiovascular Medicine, Saitama International Medical Center, Faculty of Medicine, Saitama Medical University
| | - Sou Asano
- Department of Cardiovascular Medicine, Saitama International Medical Center, Faculty of Medicine, Saitama Medical University
| | - Yoshifumi Ikeda
- Department of Cardiovascular Medicine, Saitama International Medical Center, Faculty of Medicine, Saitama Medical University
| | - Hitoshi Mori
- Department of Cardiovascular Medicine, Saitama International Medical Center, Faculty of Medicine, Saitama Medical University
| | - Mai Tawara
- Department of Cardiovascular Medicine, Saitama International Medical Center, Faculty of Medicine, Saitama Medical University
| | - Sayaka Tanaka
- Department of Cardiovascular Medicine, Saitama International Medical Center, Faculty of Medicine, Saitama Medical University
| | - Saki Hasegawa
- Department of Cardiovascular Medicine, Saitama International Medical Center, Faculty of Medicine, Saitama Medical University
| | - Shintaro Nakano
- Department of Cardiovascular Medicine, Saitama International Medical Center, Faculty of Medicine, Saitama Medical University
| | - Siro Iwanaga
- Department of Cardiovascular Medicine, Saitama International Medical Center, Faculty of Medicine, Saitama Medical University
| | - Toshihiro Muramatsu
- Department of Cardiovascular Medicine, Saitama International Medical Center, Faculty of Medicine, Saitama Medical University
| | - Kazuo Matsumoto
- Department of Cardiovascular Medicine, Saitama International Medical Center, Faculty of Medicine, Saitama Medical University
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Ishida Y, Sasaki S, Toyama Y, Nishizaki K, Shoji Y, Kinjo T, Itoh T, Horiuchi D, Kimura M, Gold MR, Tomita H. A novel screening test for inappropriate shocks due to myopotentials from the subcutaneous implantable cardioverter–defibrillator. Heart Rhythm O2 2020; 1:27-34. [PMID: 34113857 PMCID: PMC8183885 DOI: 10.1016/j.hroo.2020.01.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Background The subcutaneous implantable cardioverter-defibrillator (S-ICD) is effective in preventing sudden cardiac death. Compared with transvenous ICDs, S-ICDs have a lower rate of inappropriate shocks (IASs) for supraventricular arrhythmias, but such shocks for T-wave oversensing (TWO) and extracardiac myopotentials are more common. No screening tests to identify patients at risk for IAS due to myopotential interference (MPI) currently are available. Objective The purpose of this study was to assess the efficacy of a tube exercise test (TET) developed to detect MPI post S-ICD implantation. Methods TET includes 3 different maneuvers using an exercise tube. S-ICD electrograms were recorded to assess MPI while patients performed each of the maneuvers. Results TET was performed in 43 patients, and MPI was observed in 12 patients (28%). In 10 of the 12 TET-positive patients, the positive vector corresponded with a vector that did not show TWO on standard S-ICD preoperative screening. During median follow-up of 672 days (interquartile range 465–805 days), 3 patients (7%) experienced IAS due to MPI. Importantly, the vector at the time of IAS in all 3 patients passed standard preoperative screening for TWO but was positive with TET. Sensitivity and specificity of TET were 100% and 78%, respectively, and positive and negative predictive values were 25% and 100%, respectively. Conclusion Postimplant screening for MPI identified patients at increased risk for IAS. TET may be helpful for guiding optimal programming to prevent IAS.
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Affiliation(s)
- Yuji Ishida
- Department of Cardiology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
- Division of Cardiology, Medical University of South Carolina, Charleston, South Carolina
| | - Shingo Sasaki
- Department of Cardiology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Yuichi Toyama
- Department of Cardiology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Kimitaka Nishizaki
- Department of Cardiology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Yoshihiro Shoji
- Department of Cardiology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Takahiko Kinjo
- Department of Cardiology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Taihei Itoh
- Department of Cardiology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Daisuke Horiuchi
- Department of Cardiology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Masaomi Kimura
- Department of Cardiology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Michael R. Gold
- Division of Cardiology, Medical University of South Carolina, Charleston, South Carolina
| | - Hirofumi Tomita
- Department of Cardiology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
- Address reprint requests and correspondence: Dr Hirofumi Tomita, Department of Cardiology, Hirosaki University Graduate School of Medicine, 5 Zaifu-cho, Hirosaki, 036-8562, Japan.
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