
22/08/2025
💡 Did you know that emotions can trigger heart arrhythmias?
A review highlights something fascinating: the brain and the heart operate as an interactive unit, where both hemispheres of the brain influence the autonomic nervous system differently.
-Right hemisphere → more linked to negative emotion + sympathetic activation (stress, fear, anger).
-Left hemisphere → more linked to positive emotion + parasympathetic activity (calm, recovery).
This asymmetry means that emotional states don’t just “stress the heart” — they alter the spatial and temporal patterns of nerve input to the myocardium, shaping electrical stability or instability.
What’s striking is how specific emotions, especially anger, create pro-arrhythmic conditions by destabilising cardiac repolarisation. History and research both show cases where sudden emotional surges led directly to fatal cardiac events.
👉 This makes one thing clear: if we want to truly assess cardiac risk, HRV, or autonomic balance, we need to understand brain–heart laterality. Looking at just one hemisphere, or one-sided measures, misses half the story. And guess what? All the wearables in the market do that.
But stay tuned, I may have the solution for this 😃
Emotions aren’t just “in the mind.” They have fingerprints in our heart’s rhythm.
Taggart, P., Boyett, M. R., Logantha, S. J. R., Lambiase, P. D. (2011). Anger, emotion, and arrhythmias: from brain to heart. Frontiers in physiology, 2, 67.