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When Low Voltage Sparks High Drama: ICD Therapy in Ventricular Tachycardia.

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Title: When Low Voltage Sparks High Drama: ICD Therapy in Ventricular Tachycardia.
Authors: Goel, Shivam1 (AUTHOR), Kumar, Sumit1 (AUTHOR), Deepti, Siddharthan1 (AUTHOR) deeptikailath@gmail.com, Parakh, Neeraj1 (AUTHOR), Sharma, Gautam1 (AUTHOR), Naik, Nitish1 (AUTHOR)
Source: Pacing & Clinical Electrophysiology. May2026, Vol. 49 Issue 5, p576-580. 5p.
Subjects: Electric countershock, Cardiomyopathies, Electroconvulsive therapy, Ventricular tachycardia, Implantable cardioverter-defibrillators, Catheter ablation, Electrophysiology, Myocardial depressants, Algorithms
Abstract: The article focuses on a case involving inappropriate shock delivery by a cardiac resynchronization therapy defibrillator (CRT-D) in a 61-year-old woman with non-ischemic cardiomyopathy and recurrent slow ventricular tachycardia (VT). The device’s VF/VT Therapy Assurance (VFTA) algorithm, designed to prevent under sensing of ventricular arrhythmias by detecting low-amplitude far-field signals and long RR intervals, temporarily reprogrammed the device to deliver a shock instead of the programmed anti-tachycardia pacing (ATP). Although the shock successfully terminated the VT, the algorithm’s reliance on far-field electrograms led to inappropriate therapy due to low voltage signals in this patient. The case highlights the need for individualized programming of the VFTA algorithm to avoid unnecessary shocks in patients with advanced cardiomyopathy. [Extracted from the article]
Copyright of Pacing & Clinical Electrophysiology is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
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PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Data: When Low Voltage Sparks High Drama: ICD Therapy in Ventricular Tachycardia.
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  Data: <searchLink fieldCode="AR" term="%22Goel%2C+Shivam%22">Goel, Shivam</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kumar%2C+Sumit%22">Kumar, Sumit</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Deepti%2C+Siddharthan%22">Deepti, Siddharthan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> deeptikailath@gmail.com</i><br /><searchLink fieldCode="AR" term="%22Parakh%2C+Neeraj%22">Parakh, Neeraj</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Sharma%2C+Gautam%22">Sharma, Gautam</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Naik%2C+Nitish%22">Naik, Nitish</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Pacing+%26+Clinical+Electrophysiology%22">Pacing & Clinical Electrophysiology</searchLink>. May2026, Vol. 49 Issue 5, p576-580. 5p.
– Name: Subject
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  Data: <searchLink fieldCode="DE" term="%22Electric+countershock%22">Electric countershock</searchLink><br /><searchLink fieldCode="DE" term="%22Cardiomyopathies%22">Cardiomyopathies</searchLink><br /><searchLink fieldCode="DE" term="%22Electroconvulsive+therapy%22">Electroconvulsive therapy</searchLink><br /><searchLink fieldCode="DE" term="%22Ventricular+tachycardia%22">Ventricular tachycardia</searchLink><br /><searchLink fieldCode="DE" term="%22Implantable+cardioverter-defibrillators%22">Implantable cardioverter-defibrillators</searchLink><br /><searchLink fieldCode="DE" term="%22Catheter+ablation%22">Catheter ablation</searchLink><br /><searchLink fieldCode="DE" term="%22Electrophysiology%22">Electrophysiology</searchLink><br /><searchLink fieldCode="DE" term="%22Myocardial+depressants%22">Myocardial depressants</searchLink><br /><searchLink fieldCode="DE" term="%22Algorithms%22">Algorithms</searchLink>
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  Label: Abstract
  Group: Ab
  Data: The article focuses on a case involving inappropriate shock delivery by a cardiac resynchronization therapy defibrillator (CRT-D) in a 61-year-old woman with non-ischemic cardiomyopathy and recurrent slow ventricular tachycardia (VT). The device’s VF/VT Therapy Assurance (VFTA) algorithm, designed to prevent under sensing of ventricular arrhythmias by detecting low-amplitude far-field signals and long RR intervals, temporarily reprogrammed the device to deliver a shock instead of the programmed anti-tachycardia pacing (ATP). Although the shock successfully terminated the VT, the algorithm’s reliance on far-field electrograms led to inappropriate therapy due to low voltage signals in this patient. The case highlights the need for individualized programming of the VFTA algorithm to avoid unnecessary shocks in patients with advanced cardiomyopathy. [Extracted from the article]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Pacing & Clinical Electrophysiology is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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    Identifiers:
      – Type: doi
        Value: 10.1111/pace.70193
    Languages:
      – Code: eng
        Text: English
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        PageCount: 5
        StartPage: 576
    Subjects:
      – SubjectFull: Electric countershock
        Type: general
      – SubjectFull: Cardiomyopathies
        Type: general
      – SubjectFull: Electroconvulsive therapy
        Type: general
      – SubjectFull: Ventricular tachycardia
        Type: general
      – SubjectFull: Implantable cardioverter-defibrillators
        Type: general
      – SubjectFull: Catheter ablation
        Type: general
      – SubjectFull: Electrophysiology
        Type: general
      – SubjectFull: Myocardial depressants
        Type: general
      – SubjectFull: Algorithms
        Type: general
    Titles:
      – TitleFull: When Low Voltage Sparks High Drama: ICD Therapy in Ventricular Tachycardia.
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            NameFull: Goel, Shivam
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            NameFull: Kumar, Sumit
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            NameFull: Deepti, Siddharthan
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            NameFull: Parakh, Neeraj
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            – D: 01
              M: 05
              Text: May2026
              Type: published
              Y: 2026
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              Value: 01478389
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              Value: 49
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              Value: 5
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            – TitleFull: Pacing & Clinical Electrophysiology
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