A research institution investigated and analyzed 208 patients with symptoms such as heartache and arrhythmia. When they began to receive surgical treatment, they reported their views on the condition through a questionnaire. About 20% of them were very worried about the deterioration of the condition, some were even afraid of death, and others were not so worried. Later, the follow-up survey showed that, the recurrence rate in half a year after operation was higher in people with serious worry before operation than in others. Researchers believe that worry is not conducive to the recovery of heart disease
 Worry is a potential threat to health, and people lead to many diseases such as cancer, diabetes and so on best supports the above conclusion.