Scar Tissue's Hidden Role in Sudden Cardiac Death Revealed by New Study

Scientists at the University of Freiburg have uncovered a key mechanism behind sudden cardiac death in young, healthy people. The research, led by Prof. Peter Kohl from the University Hospital Freiburg, shows that scar tissue in the heart plays an active role in disrupting electrical signals. Their findings were published in Nature Cardiovascular Research.

The team discovered that scar tissue does not just sit passively in the heart—it actively changes how electrical signals move. At a normal heart rate, these signals behave as expected. But under stress, the signals become unstable, potentially triggering life-threatening arrhythmias.

The researchers now plan to refine their method for real-world use. Their goal is to create tools for personalised risk assessments and digital heart models. However, the newly developed 3D imaging technology used in the study has not yet been tested in wider clinical trials or compared with other methods.

This research highlights how scar tissue can disrupt heart function, especially during physical stress. The team's next steps involve adapting the findings for clinical practice. If successful, the work could improve early detection of cardiac risks in otherwise healthy individuals.