Evidence map›Paper›PMID 20969974›Full record

ArticleHeart rhythm2011

Termination of sustained atrial flutter and fibrillation using low-voltage multiple-shock therapy.

Christina M Ambrosi, Crystal M Ripplinger, Igor R Efimov, Vadim V Fedorov

4 registry-linked trialsAbstract read
In one paragraph

Article in Heart rhythm, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to 4 registered trials, which are not on this map. Cited by 24 papers.

0numbers the graph read from it
0cells of the map it votes in
24citing papers in PubMed
3.4field-weighted citation impact, top 7% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

NCT03093051 naterminatednot on this mapstarted 2019, after this paper: background citation

A Clinical Feasibility Study to Evaluate the Safety and Performance of Low-Energy Unpinning Termination Therapy in Patients With VT

TypeinterventionalSponsorCardialen, Inc.Ran2019 to 2022Enrolled6ConditionsVentricular TachycardiaArmsUnpinning Termination therapy
NCT03871231 naterminatednot on this mapstarted 2019, after this paper: background citation

An International Clinical Feasibility Study to Evaluate the Safety and Performance of Low-Energy Unpinning Termination Therapy in Patients With VT/VF

TypeinterventionalSponsorCardialen, Inc.Ran2019 to 2021Enrolled8ConditionsVentricular Tachycardia, Ventricular FibrillationArmsUnpinning Termination Therapy
NCT04206917 naterminatednot on this mapstarted 2020, after this paper: background citation

A Clinical Feasibility Study to Evaluate the Safety and Performance of Low-Energy Therapy in Patients With Atrial Fibrillation Energy Therapy in Patients With Atrial Fibrillation

TypeinterventionalSponsorCardialen, Inc.Ran2020 to 2022Enrolled30ConditionsAtrial Fibrillation, Paroxysmal, Atrial Fibrillation, Persistent, Atrial FibrillationArmsMulti Pulse Therapy
NCT05055921 naterminatednot on this mapstarted 2022, after this paper: background citation

A Clinical Feasibility Study to Evaluate the Safety and Performance of Low-Energy Therapy in Patients With Atrial Fibrillation (US)

TypeinterventionalSponsorCardialen, Inc.Ran2022 to 2022Enrolled6ConditionsAtrial Fibrillation, Paroxysmal Atrial Fibrillation, Persistent Atrial FibrillationArmsMulti Pulse Therapy as delivered from the Cardialen External Stimulation System
3 · Its place in the literature

Who cites it

24 citing papers in PubMed, 58 citations in OpenAlex.

  1. In silico optical modulation of spiral wave trajectories in cardiac tissue.Pflugers Archiv : European journal of physiology · 2023
    Article
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  3. Review
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  11. A peptidomimetic inhibitor suppresses the inducibility of β1-adrenergic autoantibody-mediated cardiac arrhythmias in the rabbit.Journal of interventional cardiac electrophysiology : an international journal of arrhythmias and pacing · 2015
    Article
  12. Review
  13. Article
  14. Review
  15. Processing and analysis of cardiac optical mapping data obtained with potentiometric dyes.American journal of physiology. Heart and circulatory physiology · 2012
    Review
  16. Article
  17. Mechanisms of ventricular arrhythmias: a dynamical systems-based perspective.American journal of physiology. Heart and circulatory physiology · 2012
    Review
  18. The Na+/K+ pump is an important modulator of refractoriness and rotor dynamics in human atrial tissue.American journal of physiology. Heart and circulatory physiology · 2012
    Article
  19. Article
  20. Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

4 authors at 1 institution in 1 country.

Christina M AmbrosiDepartment of Biomedical Engineering, Washington University in St. Louis, St. Louis, Missouri, USA.
Crystal M Ripplinger
Igor R Efimov
Vadim V Fedorov
Washington University in St. Louis · US

Funding

Virtual Electrode Polarization Hypothesis of DefibrillationR01HL067322 · NHLBI · WASHINGTON UNIVERSITY · PI EFIMOV, IGOR R · 2001 to 2010
$3.7M
Low Energy DefibrillationR01HL115415 · NHLBI · WASHINGTON UNIVERSITY · PI EFIMOV, IGOR R · 2013 to 2016
$2.1M
NHLBI NIH HHS R01 HL067322NHLBI NIH HHS R01 HL115415NHLBI NIH HHS R01 HL67322
6 · The paper itself

Abstract

backgroundDefibrillation therapy for atrial fibrillation (AF) and flutter (AFl) is limited by pain induced by high-energy shocks. Thus, lowering the defibrillation energy for AFl/AF is desirable.

objectiveIn this study we applied low-voltage multiple-shock defibrillation therapy in a rabbit model of atrial tachyarrhythmias comparing its efficacy to single shocks and antitachycardia pacing (ATP).

methodsOptical mapping was performed in Langendorff-perfused rabbit hearts (n = 18). Acetylcholine (7 ± 5 to 17 ± 16 μM) was administered to promote sustained AFl and AF, respectively. Single and multiple monophasic shocks were applied within 1 or 2 cycle lengths (CLs) of the arrhythmia.

resultsWe observed AFl (CL = 83 ± 15 ms, n = 17) and AF (CL = 50 ± 8 ms, n = 11). ATP had a success rate of 66.7% in the case of AFl, but no success with AF (n = 9). Low-voltage multiple shocks had 100% success for both arrhythmias. Multiple low-voltage shocks terminated AFl at 0.86 ± 0.73 V/cm (within 1 CL) and 0.28 ± 0.13 V/cm (within 2 CLs), as compared with single shocks at 2.12 ± 1.31 V/cm (P < .001) and AF at 3.46 ± 3 V/cm (within 1 CL), as compared with single shocks at 6.83 ± 3.12 V/cm (P =.06). No ventricular arrhythmias were induced. Optical mapping revealed that termination of AFl was achieved by a properly timed, local shock-induced wave that collides with the arrhythmia wavefront, whereas AF required the majority of atrial tissue to be excited and reset for termination.

conclusionLow-voltage multiple-shock therapy terminates AFl and AF with different mechanisms and thresholds based on spatiotemporal characteristics of the arrhythmias.

Indexed as

AnimalsAtrial FibrillationAtrial FlutterElectric CountershockElectrodes, ImplantedPain MeasurementRabbitsVoltage-Sensitive Dye Imaging

Identifiers

PMID20969974
PMCPMC3384750
OpenAlexW2030690554

What OpenQuestion holds

Textmetadata
LicenceTDM
Read underepoch 390

Registered trials

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.