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
 Those with serious worry have chemicals in their blood that increase the risk of heart disease best supports the above conclusion.