Maren Maanja

Publications
CV
Public outreach and news

Articles

Article: EUROPEAN HEART JOURNAL: DIGITAL HEALTH. 2024;6(1):45-54
Advanced electrocardiography heart age: a prognostic, explainable machine learning approach applicable to sinus and non-sinus rhythms
Al-Falahi ZS; Schlegel TT; Palencia-Lamela I; Li A; Schelbert EB; Niklasson L; Maanja M; Lindow T; Ugander M
Article: EUROPEAN HEART JOURNAL: DIGITAL HEALTH. 2024;5(4):416-426
Hypertrophic cardiomyopathy detection with artificial intelligence electrocardiography in international cohorts: an external validation study
Siontis KC; Wieczorek MA; Maanja M; Hodge DO; Kim H-K; Lee H-J; Lee H; Lim J; Park CS; Ariga R; Raman B; Mahmod M; Watkins H; Neubauer S; Windecker S; Siontis GCM; Gersh BJ; Ackerman MJ; Attia ZI; Friedman PA; Noseworthy PA
Article: ANNALS OF NONINVASIVE ELECTROCARDIOLOGY. 2024;29(1):e13097
ISE/ISHNE expert consensus statement on the ECG diagnosis of left ventricular hypertrophy: The change of the paradigm
Bacharova L; Chevalier P; Gorenek B; Jons C; Li Y-G; Locati ET; Maanja M; Perez-Riera AR; Platonov PG; Ribeiro ALP; Schocken D; Soliman EZ; Svehlikova J; Tereshchenko LG; Ugander M; Varma N; Elena Z; Ikeda T
Article: JOURNAL OF ELECTROCARDIOLOGY. 2023;81:286-291
Saliency maps provide insights into artificial intelligence-based electrocardiography models for detecting hypertrophic cardiomyopathy.
Siontis KC; Suárez AB; Sehrawat O; Ackerman MJ; Attia ZI; Friedman PA; Noseworthy PA; Maanja M
Article: EUROPEAN HEART JOURNAL: DIGITAL HEALTH. 2023;4(5):384-392
Heart age gap estimated by explainable advanced electrocardiography is associated with cardiovascular risk factors and survival
Lindow T; Maanja M; Schelbert EB; Ribeiro AH; Ribeiro ALP; Schlegel TT; Ugander M
Journal article: HEART LUNG AND CIRCULATION. 2023;32:s382
An Explainable Advanced Electrocardiography Heart Age for Use in Both Sinus and Non-Sinus Rhythms Associates With Cardiovascular Risk, Morbidity, and Survival
Al-Falahi Z; Lindow T; Lamela-Palencia I; Li A; Schelbert E; Niklasson L; Maanja M; Schlegel T; Ugander M
Article: CARDIOVASCULAR DIGITAL HEALTH JOURNAL. 2022;3(6):289-296
Tandem deep learning and logistic regression models to optimize hypertrophic cardiomyopathy detection in routine clinical practice.
Maanja M; Noseworthy PA; Geske JB; Ackerman MJ; Arruda-Olson AM; Ommen SR; Attia ZI; Friedman PA; Siontis KC
Article: SCIENTIFIC REPORTS. 2022;12(1):18364
An electrocardiography score predicts heart failure hospitalization or death beyond that of cardiovascular magnetic resonance imaging
Maanja M; Schlegel TT; Frojdh F; Niklasson L; Wieslander B; Bacharova L; Schelbert EB; Ugander M
Article: SCIENTIFIC REPORTS. 2022;12(1):15106
Improved evaluation of left ventricular hypertrophy using the spatial QRS-T angle by electrocardiography
Maanja M; Schlegel TT; Kozor R; Bacharova L; Wong TC; Schelbert EB; Ugander M
Article: JOURNAL OF ELECTROCARDIOLOGY. 2021;68:1-5
Predicting peri-operative troponin elevation by advanced electrocardiography
Sapra R; Hallqvist L; Schlegel TT; Ugander M; Bell M; Maanja M
Article: JACC-CARDIOVASCULAR IMAGING. 2020;13(11):2343-2354
Extracellular Volume and Global Longitudinal Strain Both Associate With Outcomes But Correlate Minimally
Frojdh F; Fridman Y; Bering P; Sayeed A; Maanja M; Niklasson L; Olausson E; Pi H; Azeem A; Wong TC; Kellman P; Feingold B; Christopher A; Fukui M; Cavalcante JL; Miller CA; Butler J; Ugander M; Schelbert EB
Article: JOURNAL OF ELECTROCARDIOLOGY. 2020;58:171-175
Substantial prevalence of subclinical cardiovascular diseases in patients with hemophilia A evaluated by advanced electrocardiography
Zong Y; Maanja M; Chaireti R; Schlegel TT; Ugander M; Antovic JP
Article: JOURNAL OF ELECTROCARDIOLOGY. 2020;58:80-86
The electrical determinants of increased wall thickness and mass in left ventricular hypertrophy
Maanja M; Schlegel TT; Kozor R; Lundin M; Wieslander B; Wong TC; Schelbert EB; Ugander M
Article: JACC-CARDIOVASCULAR IMAGING. 2020;13(1):44-54
Extracellular Volume Associates With Outcomes More Strongly Than Native or Post-Contrast Myocardial T1
Treibel TA; Fridman Y; Bering P; Sayeed A; Maanja M; Frojdh F; Niklasson L; Olausson E; Wong TC; Kellman P; Miller CA; Moon JC; Ugander M; Schelbert EB
Article: JOURNAL OF CARDIOVASCULAR MAGNETIC RESONANCE. 2019;21(1):71
The dynamics of extracellular gadolinium-based contrast agent excretion into pleural and pericardial effusions quantified by T1 mapping cardiovascular magnetic resonance
Thalen S; Maanja M; Sigfridsson A; Maret E; Sorensson P; Ugander M
Article: JAMA CARDIOLOGY. 2017;2(9):995-1006
Temporal Relation Between Myocardial Fibrosis and Heart Failure With Preserved Ejection Fraction Association With Baseline Disease Severity and Subsequent Outcome
Schelbert EB; Fridman Y; Wong TC; Abu Daya H; Piehler KM; Kadakkal A; Miller CA; Ugander M; Maanja M; Kellman P; Shah DJ; Abebe KZ; Simon MA; Quarta G; Senni M; Butler J; Diez J; Redfield MM; Gheorghiade M
Article: JOURNAL OF THE AMERICAN HEART ASSOCIATION. 2017;6(1):e003795
Diffuse Myocardial Fibrosis Reduces Electrocardiographic Voltage Measures of Left Ventricular Hypertrophy Independent of Left Ventricular Mass
Maanja M; Wieslander B; Schlegel TT; Bacharova L; Abu Daya H; Fridman Y; Wong TC; Schelbert EB; Ugander M

All other publications

Preprint: MEDRXIV. 2025
Explainable advanced electrocardiography at rest for ruling out myocardial ischemia on stress echocardiography
Yang K; von Scheele J; Maanja M; Loewenstein D; Schlegel T; Ugander M; Kozor R
Preprint: MEDRXIV. 2024
Advanced ECG heart age estimation applicable to both sinus and non-sinus rhythm associates with cardiovascular risk, cardiovascular morbidity, and survival
Al-Falahi Z; Schlegel T; Lamela-Palencia I; Li A; Schelbert E; Niklasson L; Maanja M; Lindow T; Ugander M
Review: JOURNAL OF ELECTROCARDIOLOGY. 2023;81:85-93
ISE/ISHNE Expert Consensus Statement on ECG Diagnosis of Left Ventricular Hypertrophy: The Change of the Paradigm. The joint paper of the International Society of Electrocardiology and the International Society for Holter Monitoring and Noninvasive Electrocardiology
Bacharova L; Chevalier P; Gorenek B; Jons C; Li Y-G; Locati ET; Maanja M; Perez-Riera AR; Platonov PG; Ribeiro ALP; Schocken D; Soliman EZ; Svehlikova J; Tereshchenko LG; Ugander M; Varma N; Zaklyazminskaya E; Ikeda T
Preprint: MEDRXIV. 2023
An Explainable Advanced Electrocardiography Score for Diastolic Dysfunction – Derivation, Validation and Prognostic Performance
McColl H; Kuhasri A; Chowdhury S; Wen Y; Loewenstein D; Schlegel T; Maanja M; Yang K; Al-Falahi Z; Lindow T; Price M; Fulthorp E; Lal S; McGrady M; Gladding P; Kozor R; Ugander M
Preprint: MEDRXIV. 2023;MEDRXIV
Diffuse myocardial fibrosis associates with incident ventricular arrhythmia in implantable cardioverter defibrillator recipients.
Olausson E; Wertz J; Fridman Y; Bering P; Maanja M; Niklasson L; Wong TC; Fukui M; Cavalcante JL; Cater G; Kellman P; Bukhari S; Miller CA; Saba S; Ugander M; Schelbert EB
Review: ARRHYTHMIA AND ELECTROPHYSIOLOGY REVIEW. 2023;12:e12
Artificial Intelligence for the Detection and Treatment of Atrial Fibrillation
Harmon DM; Sehrawat O; Maanja M; Wight J; Noseworthy PA
Preprint: MEDRXIV. 2022
Improved evaluation of left ventricular hypertrophy using the spatial QRS-T angle by electrocardiography
Maanja M; Schlegel TT; Kozor R; Bacharova L; Wong TC; Schelbert EB; Ugander M
Preprint: MEDRXIV. 2022
An electrocardiography score predicts heart failure hospitalization or death beyond that of cardiovascular magnetic resonance imaging
Maanja M; Schlegel TT; Fröjdh F; Niklasson L; Wieslander B; Bacharova L; Schelbert EB; Ugander M
Conference publication: JOURNAL OF CARDIOVASCULAR COMPUTED TOMOGRAPHY. 2021;15(4):s1
Advanced Electrocardiography Has A High Negative Predictive Value For Ruling Out Significant Coronary Artery Disease By Cardiovascular CT
Rajamohan M; Loewenstein D; Maanja M; Cheepvasarach C; Schlegel T; Ugander M; Kozor R
Doctoral thesis: 2020
Advanced electrocardiography in myocardial electrical remodeling : insights from cardiovascular magnetic resonance imaging
Maanja M
Conference publication: JOURNAL OF THE AMERICAN COLLEGE OF CARDIOLOGY. 2018;71(11):1454
DIFFUSE MYOCARDIAL FIBROSIS MEASURED BY EXTRACELLULAR VOLUME ASSOCIATES WITH INCIDENT VENTRICULAR ARRHYTHMIA IN IMPLANTABLE CARDIOVERTER DEFIBRILLATOR RECIPIENTS MORE THAN FOCAL FIBROSIS
Olausson E; Frojdh F; Maanja M; Niklasson L; Fridman Y; Bering P; Wertz J; Wong T; Kellman P; Miller C; Saba S; Ugander M; Schelbert E
Conference publication: EUROPEAN HEART JOURNAL. 2016;37:410
Diffuse myocardial fibrosis reduces electrocardiographic voltage criteria for left ventricular hypertrophy independent of left ventricular mass
Maanja M; Wieslander B; Schlegel TT; Bacharova L; Abu Daya H; Fridman Y; Wong TC; Schelbert EB; Ugander M

Employments

Affiliated to Research, Department of Molecular Medicine and Surgery, Karolinska Institutet, 2023-2026

Degrees and Education

Degree Of Doctor Of Philosophy, Department of Molecular Medicine and Surgery, Karolinska Institutet, 2020
Degree Of Master Of Science In Medicine, Karolinska Institutet, 2017

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