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Home Science & Environment Medical Research

Using AI to calculate the heart’s biological age predicts increased risk of mortality, cardiovascular events: Study

March 31, 2025
in Medical Research
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While everybody’s heart has an absolute chronological age (as old as that person is), hearts also have a theoretical “biological” age that is based on how the heart functions. So, someone who is 50 but has poor heart health could have a biological heart age of 60, while someone aged 50 with optimal heart health could have a biological heart age of 40.

Researchers presenting a study at EHRA 2025, a scientific congress of the European Society of Cardiology (ESC), demonstrated that by using artificial intelligence (AI) to analyze standard 12-lead electrocardiograph (ECG) data taken from almost half a million cases, they were able to create an algorithm to predict the biological age of the heart. This algorithm could be used to identify those most at risk of cardiovascular events and mortality.

“Our research showed that when the biological age of the heart exceeded its chronological age by seven years, the risk of all-cause mortality and major adverse cardiovascular events increased sharply,” explains Associate Professor Yong-Soo Baek, Inha University Hospital, in South Korea.

“Conversely, if the algorithm estimated the biological heart as seven years younger than the chronological age, that reduced the risk of death and major adverse cardiovascular events.”

The integration of artificial intelligence (AI) into clinical diagnostics presents novel opportunities for enhancing predictive accuracy in cardiology.

“Using AI to develop algorithms in this way introduces a potential paradigm shift in cardiovascular risk assessment,” says Associate Professor Baek.

Their study evaluated the prognostic capabilities of a deep-learning-based algorithm that calculates biological ECG heart age (AI ECG-heart age) from 12-lead ECGs, comparing its predictive power against traditional chronological age (CA) for mortality and cardiovascular outcomes.

A deep neural network was developed and trained on a substantial dataset of 425,051 12-lead ECGs collected over fifteen years, with subsequent validation and testing on an independent cohort of 97,058 ECGs. Comparative analyses were conducted among age and sex-matched patients differentiated by ejection fraction (EF).

In statistical models, an AI ECG-heart age exceeding the heart’s chronological age by seven years was associated with an increased risk of all-cause mortality by 62% and of MACE by 92%. In contrast, an AI ECG heart age that was seven years younger than its chronological age reduced the risk of all-cause mortality by 14% and MACE by 27%.

Additionally, subjects with reduced ejection fraction consistently exhibited increased AI ECG heart ages, along with prolonged QRS durations (the time taken for the heart’s electrical signal to travel through the ventricles, causing contraction) and corrected QT intervals (the total time needed for the heart’s electrical system to complete one cycle of contraction and relaxation).

The authors explain that the significance of the observed correlation between reduced ejection fraction and increased AI ECG heart ages, alongside prolonged QRS durations and corrected QT intervals, suggests that AI ECG heart age effectively reflects various cardiac depolarization and repolarization processes.

These indicators of electrical remodeling within the heart may signify underlying cardiac health conditions and their association with ejection fraction (EF).

However, Associate Professor Baek explains, “It is crucial to obtain a statistically sufficient sample size in future studies to substantiate these findings further. This approach will enhance the robustness and applicability of AI ECG in clinical assessments of cardiac function and health.”

He concludes, “Biological heart age estimated by artificial intelligence from 12-lead electrocardiograms is strongly associated with increased mortality and cardiovascular events, underscoring its utility in enhancing early detection and preventive strategies in cardiovascular health care. This study confirms the transformative potential of AI in refining clinical assessments and improving patient outcomes.”

Provided by
European Society of Cardiology


Citation:
Using AI to calculate the heart’s biological age predicts increased risk of mortality, cardiovascular events: Study (2025, March 31)
retrieved 31 March 2025
from https://medicalxpress.com/news/2025-03-ai-heart-biological-age-mortality.html

This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no
part may be reproduced without the written permission. The content is provided for information purposes only.




ECG
Credit: CC0 Public Domain

While everybody’s heart has an absolute chronological age (as old as that person is), hearts also have a theoretical “biological” age that is based on how the heart functions. So, someone who is 50 but has poor heart health could have a biological heart age of 60, while someone aged 50 with optimal heart health could have a biological heart age of 40.

Researchers presenting a study at EHRA 2025, a scientific congress of the European Society of Cardiology (ESC), demonstrated that by using artificial intelligence (AI) to analyze standard 12-lead electrocardiograph (ECG) data taken from almost half a million cases, they were able to create an algorithm to predict the biological age of the heart. This algorithm could be used to identify those most at risk of cardiovascular events and mortality.

“Our research showed that when the biological age of the heart exceeded its chronological age by seven years, the risk of all-cause mortality and major adverse cardiovascular events increased sharply,” explains Associate Professor Yong-Soo Baek, Inha University Hospital, in South Korea.

“Conversely, if the algorithm estimated the biological heart as seven years younger than the chronological age, that reduced the risk of death and major adverse cardiovascular events.”

The integration of artificial intelligence (AI) into clinical diagnostics presents novel opportunities for enhancing predictive accuracy in cardiology.

“Using AI to develop algorithms in this way introduces a potential paradigm shift in cardiovascular risk assessment,” says Associate Professor Baek.

Their study evaluated the prognostic capabilities of a deep-learning-based algorithm that calculates biological ECG heart age (AI ECG-heart age) from 12-lead ECGs, comparing its predictive power against traditional chronological age (CA) for mortality and cardiovascular outcomes.

A deep neural network was developed and trained on a substantial dataset of 425,051 12-lead ECGs collected over fifteen years, with subsequent validation and testing on an independent cohort of 97,058 ECGs. Comparative analyses were conducted among age and sex-matched patients differentiated by ejection fraction (EF).

In statistical models, an AI ECG-heart age exceeding the heart’s chronological age by seven years was associated with an increased risk of all-cause mortality by 62% and of MACE by 92%. In contrast, an AI ECG heart age that was seven years younger than its chronological age reduced the risk of all-cause mortality by 14% and MACE by 27%.

Additionally, subjects with reduced ejection fraction consistently exhibited increased AI ECG heart ages, along with prolonged QRS durations (the time taken for the heart’s electrical signal to travel through the ventricles, causing contraction) and corrected QT intervals (the total time needed for the heart’s electrical system to complete one cycle of contraction and relaxation).

The authors explain that the significance of the observed correlation between reduced ejection fraction and increased AI ECG heart ages, alongside prolonged QRS durations and corrected QT intervals, suggests that AI ECG heart age effectively reflects various cardiac depolarization and repolarization processes.

These indicators of electrical remodeling within the heart may signify underlying cardiac health conditions and their association with ejection fraction (EF).

However, Associate Professor Baek explains, “It is crucial to obtain a statistically sufficient sample size in future studies to substantiate these findings further. This approach will enhance the robustness and applicability of AI ECG in clinical assessments of cardiac function and health.”

He concludes, “Biological heart age estimated by artificial intelligence from 12-lead electrocardiograms is strongly associated with increased mortality and cardiovascular events, underscoring its utility in enhancing early detection and preventive strategies in cardiovascular health care. This study confirms the transformative potential of AI in refining clinical assessments and improving patient outcomes.”

Provided by
European Society of Cardiology


Citation:
Using AI to calculate the heart’s biological age predicts increased risk of mortality, cardiovascular events: Study (2025, March 31)
retrieved 31 March 2025
from https://medicalxpress.com/news/2025-03-ai-heart-biological-age-mortality.html

This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no
part may be reproduced without the written permission. The content is provided for information purposes only.



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