Why does the heart ache when a person feels sad?

After experiencing intense emotional fluctuations, especially profound sadness, the human body may exhibit a medical phenomenon known as "broken heart syndrome" or "stress-induced cardiomyopathy." In this condition, activity of the sympathetic nervous system significantly increases, triggering physiological responses such as elevated blood pressure and accelerated heart rate.

As blood pressure rises, the burden on the heart increases correspondingly, and the heart muscle's demand for oxygen also rises. Prolonged or intense emotional stress may cause spasms in the small arteries of the heart, thereby restricting blood supply to the heart and causing myocardial ischemia, which can produce chest pain sensations similar to those experienced during a heart attack.

For individuals already suffering from coronary artery disease, this emotionally induced state of heightened sympathetic nervous system activation is particularly dangerous, as it may directly trigger angina attacks or even myocardial infarction, causing the heart to endure more severe pain. Additionally, emotional fluctuations may cause rapid breathing, which can lead to disturbances in the body's acid-base balance and neurological dysfunction, both of which might intensify the discomfort of cardiac pain.

If signs of heart pain occur after emotional fluctuations, prompt medical attention should be sought.