If the patient has a fast heart rate accompanied by high blood pressure, it can be caused by hyperthyroidism, but the above condition can also be caused by other diseases. Patients who are overexcited by sympathetic nerves, such as excessive tension, stress, fatigue, emotional overexcitement, drinking large amounts of strong coffee and tea, smoking, and alcohol abuse, can lead to increased myocardial contraction, elevated blood pressure, and sympathetic overexcitation. For endocrine metabolic diseases, in hyperthyroidism and hyperadrenocorticism, there are typical symptoms of rapid heart rate and high blood pressure. For organic heart diseases, such as coronary artery disease, unstable angina, acute myocarditis, and acute pericarditis, these conditions can also cause patients to have an accelerated heart rate accompanied by increased blood pressure. For some infectious diseases, such as bacteria, viruses, and atypical pathogens, which lead to serious infections in patients, there will also be symptoms of fast heart rate accompanied by high blood pressure.