Evidence map›Paper›PMID 33167779›Full record

ArticleCirculation research2021

Machine Learned Cellular Phenotypes in Cardiomyopathy Predict Sudden Death.

Albert J Rogers, Anojan Selvalingam, Mahmood I Alhusseini, David E Krummen, Cesare Corrado, Firas Abuzaid, Tina Baykaner, Christian Meyer, Paul Clopton, Wayne Giles and 6 more

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In one paragraph

Article in Circulation research, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 31 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
31citing papers in PubMed, 1 pooled it
5.7field-weighted citation impact, top 3% 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.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

31 citing papers in PubMed, 1 synthesis or guideline pooled it, 52 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Article
  4. Article
  5. Review
  6. Evaluating artificial intelligence-enabled medical tests in cardiology: Best practice.International journal of cardiology. Heart & vasculature · 2025
    Review
  7. Physics-Inspired Diffusion Probabilistic Models for Improved Denoising in Intracardiac Time Series.Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference · 2025
    Article
  8. Review
  9. Article
  10. Adopting artificial intelligence in cardiovascular medicine: a scoping review.Hypertension research : official journal of the Japanese Society of Hypertension · 2024
    Article
  11. Article
  12. The Thyroid-cardiac Axis: Thyroid Function, Cardiac Rhythmology, and Sudden Cardiac Death.Endocrine, metabolic & immune disorders drug targets · 2024
    Review
  13. Article
  14. Optimizing patient selection for primary prevention implantable cardioverter-defibrillator implantation: utilizing multimodal machine learning to assess risk of implantable cardioverter-defibrillator non-benefit.Europace : European pacing, arrhythmias, and cardiac electrophysiology : journal of the working groups on cardiac pacing, arrhythmias, and cardiac cellular electrophysiology of the European Society of Cardiology · 2023
    Article
  15. Can Machine Learning Disrupt the Prediction of Sudden Death?Journal of the American College of Cardiology · 2023
    Article
  16. Article
  17. Primer on Machine Learning in Electrophysiology.Arrhythmia & electrophysiology review · 2023
    Review
  18. Review
  19. Review
  20. Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

16 authors at 7 institutions in 4 countries.

Albert J RogersDepartment of Medicine and Cardiovascular Institute (A.J.R., A.S., M.I.A., T.B., P.C., P.J.W., S.M.N.), Stanford University.
Anojan SelvalingamDepartment of Medicine and Cardiovascular Institute (A.J.R., A.S., M.I.A., T.B., P.C., P.J.W., S.M.N.), Stanford University.
Mahmood I AlhusseiniDepartment of Medicine and Cardiovascular Institute (A.J.R., A.S., M.I.A., T.B., P.C., P.J.W., S.M.N.), Stanford University.
David E KrummenDepartment of Medicine (D.E.K.), University of California, San Diego.
Cesare CorradoDepartment of Biomedical Engineering, King's College London, United Kingdom (C.C., S.N.).
Firas AbuzaidDepartment of Computer Sciences (F.A., M.Z., P.B.), Stanford University.
Tina BaykanerDepartment of Medicine and Cardiovascular Institute (A.J.R., A.S., M.I.A., T.B., P.C., P.J.W., S.M.N.), Stanford University.
Christian MeyerDepartment of Cardiology, University Medical Center Hamburg-Eppendorf, Germany (A.S., C.M.).
Paul CloptonDepartment of Medicine and Cardiovascular Institute (A.J.R., A.S., M.I.A., T.B., P.C., P.J.W., S.M.N.), Stanford University.
Wayne GilesDepartment of Physiology and Pharmacology, University of Calgary, Canada (W.G.).
Peter BailisDepartment of Computer Sciences (F.A., M.Z., P.B.), Stanford University.
Steven NiedererDepartment of Biomedical Engineering, King's College London, United Kingdom (C.C., S.N.).
Paul J WangDepartment of Medicine and Cardiovascular Institute (A.J.R., A.S., M.I.A., T.B., P.C., P.J.W., S.M.N.), Stanford University.
Wouter-Jan RappelDepartment of Physics (W.-J.R.), University of California, San Diego.
Matei ZahariaDepartment of Computer Sciences (F.A., M.Z., P.B.), Stanford University.
Sanjiv M NarayanDepartment of Medicine and Cardiovascular Institute (A.J.R., A.S., M.I.A., T.B., P.C., P.J.W., S.M.N.), Stanford University.
Cardiovascular Institute of the South · USKing's College London · GBStanford University · USUniversität Hamburg · DEUniversity of San Diego · USTwitter (United States) · USUniversity of Calgary · CA

Funding

The Dynamics of Human Atrial FibrillationR01HL083359 · NHLBI · UNIVERSITY OF CALIFORNIA, SAN DIEGO · PI Sanjiv M Narayan · 2008 to 2026
$7.9M
Patient-Directed Computational Analysis of Atrial FibrillationR01HL122384 · NHLBI · UNIVERSITY OF CALIFORNIA, SAN DIEGO · PI WOUTER-JAN RAPPEL · 2015 to 2026
$5.3M
Machine Learning in Atrial FibrillationR01HL149134 · NHLBI · STANFORD UNIVERSITY · PI NARAYAN, SANJIV M · 2020 to 2024
$3.8M
Deep Neural Networks To Treat Atrial FibrillationK23HL145017 · NHLBI · STANFORD UNIVERSITY · PI BAYKANER, TINA · 2019 to 2023
$968k
Determining strength and temporal stability of rotational and focal sources during human atrial fibrillationR21HL145500 · NHLBI · UNIVERSITY OF CALIFORNIA, SAN DIEGO · PI RAPPEL, WOUTER-JAN · 2019 to 2020
$236k
Novel Atrial Fibrillation Phenotypes Defined by Functional-Anatomical, Machine-Learned ClassificationsF32HL144101 · NHLBI · STANFORD UNIVERSITY · PI ROGERS, ALBERT JOSEPH · 2018 to 2019
$130k
NHLBI NIH HHS F32 HL144101NHLBI NIH HHS K23 HL145017NHLBI NIH HHS R01 HL083359NHLBI NIH HHS R01 HL122384NHLBI NIH HHS R01 HL149134NHLBI NIH HHS R21 HL145500
6 · The paper itself

Abstract

rationaleSusceptibility to VT/VF (ventricular tachycardia/fibrillation) is difficult to predict in patients with ischemic cardiomyopathy either by clinical tools or by attempting to translate cellular mechanisms to the bedside.

objectiveTo develop computational phenotypes of patients with ischemic cardiomyopathy, by training then interpreting machine learning of ventricular monophasic action potentials (MAPs) to reveal phenotypes that predict long-term outcomes. METHODS AND

resultsWe recorded 5706 ventricular MAPs in 42 patients with coronary artery disease and left ventricular ejection fraction ≤40% during steady-state pacing. Patients were randomly allocated to independent training and testing cohorts in a 70:30 ratio, repeated K=10-fold. Support vector machines and convolutional neural networks were trained to 2 end points: (1) sustained VT/VF or (2) mortality at 3 years. Support vector machines provided superior classification. For patient-level predictions, we computed personalized MAP scores as the proportion of MAP beats predicting each end point. Patient-level predictions in independent test cohorts yielded c-statistics of 0.90 for sustained VT/VF (95% CI, 0.76-1.00) and 0.91 for mortality (95% CI, 0.83-1.00) and were the most significant multivariate predictors. Interpreting trained support vector machine revealed MAP morphologies that, using in silico modeling, revealed higher L-type calcium current or sodium-calcium exchanger as predominant phenotypes for VT/VF.

conclusionsMachine learning of action potential recordings in patients revealed novel phenotypes for long-term outcomes in ischemic cardiomyopathy. Such computational phenotypes provide an approach which may reveal cellular mechanisms for clinical outcomes and could be applied to other conditions.

Indexed as

Diagnosis, Computer-AssistedElectrophysiologic Techniques, CardiacNeural Networks, ComputerSignal Processing, Computer-AssistedSupport Vector MachineAction PotentialsAgedAged, 80 and overCardiomyopathiesDeath, Sudden, CardiacFemaleHumansMaleMiddle AgedMyocardial InfarctionPhenotypeartificial intelligencecoronary diseasedeath, sudden, cardiacheart failureion channelssystems biology

Identifiers

PMID33167779
PMCPMC7855939
OpenAlexW3105222409

What OpenQuestion holds

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Registered trials

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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.