What is the concept of atrial reentrant tachycardia?

summary

The incidence of atrioventricular reentrant tachycardia (AVRT) is second only to atrioventricular nodal reentrant tachycardia, accounting for about 30% of all supraventricular tachycardia. Patients may have palpitations, precordial discomfort or angina pectoris, vertigo, severe can have blood pressure, shock and cardiac insufficiency. What is the concept of atrial reentrant tachycardia?

What is the concept of atrial reentrant tachycardia?

The incidence rate of AVRT is still unclear. Occult bypass is involved in AVRT patients from children to the elderly, more young people. Young patients often do not have organic heart disease, while older patients may have a variety of organic heart disease. Most patients with AVRT have no evidence of organic heart disease, while a small number of patients may have hypertrophic cardiomyopathy, rheumatic heart disease, etc.

Atrioventricular reentrant tachycardia occurs in patients with organic heart, or in patients with reverse atrioventricular reentrant tachycardia. Because the ventricular rate is fast and lasts for a long time, syncope, angina pectoris, cardiogenic shock, hypotension can be combined, and heart failure can be induced. In severe cases, sudden death and other complications can occur.

For the patients with frequent attacks, long duration and obvious symptoms, it is necessary to prevent attacks after termination. 1. Drug prevention: all drugs that can control acute attack can prevent recurrence in principle, but preventing recurrence is far less effective than controlling acute attack. Commonly used drugs are digoxin, verapamil β Receptor blockers, amiodarone, propafenone, etc. 2. Catheter ablation, the current catheter ablation treatment of this disease has achieved good results, is the radical method, should be the preferred treatment.

matters needing attention

During chronic treatment, drug therapy may control recurrence by directly acting on the reentry loop, or by inhibiting trigger factors, such as spontaneous premature contraction. Indications for drug therapy include patients with frequent episodes, affecting normal life or severe symptoms who are unwilling or unable to accept radiofrequency catheter ablation. For patients with occasional, transient, or mild symptoms, medication is not necessary, or medication is given when tachycardia is needed.