The causes of dyspnea in hypertensive patients: 1, hypertensive left heart failure, which is due to increased peripheral resistance to cardiac failure. 2, coronary angina attack, which is due to cardiac ischemia resulting in cardiac insufficiency. 3, combined whistling system diseases such as bronchial asthma, pulmonary heart disease episodes, pulmonary disease itself has difficulty in whistling, which can be understood by medical history. 4, so for the whistling difficulty of hypertensive patients must promptly seek medical attention and eliminate the crisis.