Cardiovascular patients should not drink strong tea, you can drink light tea. Because tea contains caffeine, theophylline, etc., can aggravate cardiovascular disease. 1. Caffeine: after being absorbed by patients with cardiovascular disease, it can cause sympathetic nerve excitation, making the heart rate increase. If the patient has cardiovascular disease, it can make the left ventricular load increase, further aggravate the oxygen consumption of the heart, accelerate the occurrence of heart failure. 2. Theophylline and so on: tea contains theophylline, xanthines and polyphenols, these substances may react with some components of cardiovascular drugs, thus affecting the effect of drugs. Remind patients: If the patient has cardiovascular disease, it is recommended to drink less tea, at the same time to low-salt, low-fat diet, do not drink coffee, do not stay up late, emotional stability, not a lot of exercise.