(1) Alleviate or eliminate symptoms: Most patients with arrhythmia have certain symptoms, including palpitations, chest tightness, precordial discomfort, weakness and other symptoms, which even affect sleepiness, work, rest and daily life. If treated in time, the above symptoms can be alleviated or disappeared, which is effective in improving the quality of life of patients.
(2) Prevention of sudden death: Sudden cardiac death is a common clinical form of death. Among patients with heart disease, coronary heart disease has the highest rate of sudden death, accounting for 80% of the rate of sudden cardiac death. According to statistics, every year in the United States, there are sudden cardiac death occurs in 300,000 to 600,000 people, accounting for 40% to 50% of all deaths from heart disease. Among the cases of sudden death, 80% to 90% of the patients died of tachy ventricular arrhythmia complicated by ventricular fibrillation. The remaining 10% to 20% are bradyarrhythmias and electromechanical dissociation (the electrocardiogram shows electrical activity but no heart sounds are heard, mostly caused by a ruptured heart). Therefore, antiarrhythmic treatment is very necessary and plays a certain role in preventing sudden death.
(3) Maintain normal or near-normal blood circulation: A normal heart has good compensatory and regulatory capabilities. When the heart rate increases to 180 beats/min, it can continue to increase cardiac output. When the heart rate slows down to 35 beats/min, or even 30 beats/min, it can maintain sufficient cardiac output, maintain normal blood circulation, and keep blood pressure in the normal or close to normal range. However, if the heart has pathological changes and the cardiac function is not normal, it will lose its ability to compensate and regulate, resulting in a decrease in cardiac output, a drop in blood pressure and blood circulation disorders. If the atrial systolic function is abnormal, or the atrial and ventricular systolic procedures are changed, the cardiac output can be reduced by about 30%, causing symptoms such as palpitations, chest tightness, and weakness. Depending on the condition, different treatment methods such as drugs, electrical defibrillation, radiofrequency ablation or the installation of pacemakers are used to correct the arrhythmia and maintain normal or near-normal blood circulation.
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