Atrial premature contraction
It refers to atrial agitation originating from any part of the atrium other than the sinoatrial node, mainly manifested as palpitation. Some patients have chest tightness and fatigue symptoms, and they consciously have a sense of cardiac arrest, while others may have no symptoms. In patients with various organic heart diseases, such as coronary heart disease, pulmonary heart disease and cardiomyopathy, the incidence of atrial premature contraction is obviously increased, which can often lead to other rapid atrial arrhythmia.
Atrial premature beats usually do not need treatment, and those with obvious symptoms can be treated with antiarrhythmic drugs such as propafenone and β receptor antagonists.
Atrioventricular junctional premature contraction
Impulse originates from atrioventricular junction, which can be transmitted forward and backward, and generally has no obvious symptoms and usually does not need treatment.
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It is one of the most common arrhythmias. Ventricular excitation generated in advance from ectopic pacing points below the branch of His bundle can occur in normal people and patients with various heart diseases. Myocarditis, ischemia, hypoxia, anesthesia and surgery can all be induced. Drugs, electrolyte disorders, excessive smoking, alcohol and coffee can also induce premature ventricular contractions.
The clinical symptoms of premature ventricular contraction include palpitation, weightlessness, or strong heartbeat after compensatory gap.
Electrocardiogram (ECG), QRS wave occurring in advance, is fishhook-shaped, wide and deformed.
Treatment of ventricular premature contraction
Patients without organic heart disease do not need to use drugs if they have no obvious symptoms; Those with obvious symptoms can be treated with β -blockers, mexiletine and propafenone.
The main purpose of frequent ventricular extrasystole therapy is to prevent ventricular tachycardia, ventricular fibrillation and sudden cardiac death. Lidocaine can be used for emergency treatment of premature ventricle with organic heart disease; For premature ventricular contraction caused by digitalis poisoning, stop taking medicine and give phenytoin sodium to correct hypokalemia; Quinidine syncope can be selected from β -blockers, amiodarone and arrhythmia.
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