Pulse decompensation is when the heart rate is greater than the pulse rate. The rhythm of the pulse reflects the rhythm of the heart. In normal people, the pulse rhythm is regular, but in those with sinus arrhythmia, the pulse rhythm can change with breathing. It increases during inspiration and slows down during expiration. Patients with various arrhythmias can affect the pulse rhythm, such as those with atrial fibrillation whose pulse rhythm is absolutely irregular. Atrial fibrillation (AF), this arrhythmia can have “three inconsistencies”, i.e., inconsistent heart sounds, inconsistent fast and slow, and inconsistent with the pulse (pulse dehiscence). Propranolol, verapamil, and cardiac glycosides such as cetiran can be used for treatment. Atrial fibrillation graphically describes a state of high-frequency, irregular, uncoordinated movement of one fiber of the atrial muscle, with a fibrillation frequency of 400 to 600 beats/min. Early atrial fibrillation is mostly paroxysmal, recurrent and unpredictable, just like the wind and rain in the natural world, which come and go and are erratic. Late atrial fibrillation is mostly persistent and lifelong, often adding to the health condition, and it can be said that only those who suffer from atrial fibrillation can truly experience the pain of the disease. 1, symptoms Palpitations, shortness of breath, anxiety, chest tightness, irregular heartbeat. When the paroxysmal attack or the ventricular rate is faster, the symptoms are more obvious, often accompanied by heart failure symptoms. There may be atrial thrombosis, causing embolism. There may be atrial thrombosis, causing embolism. 2. Signs The general heart rate is 100-60 beats per minute, and the heart rhythm is irregular. When the heart rate is slow, the heart rhythm can be regular; the heart sound varies in intensity, and sometimes the second heart sound disappears; there is a lack of pulse. There may be signs of the original heart disease. 3, diagnosis ECG P wave disappears and is replaced by f wave, frequency 350-600 times/minute, QRS wave spacing is absolutely irregular.