Sinus rhythm with one degree of atrioventricular block most of the asymptomatic, usually do not need special treatment; have syncope and other obvious symptoms of patients, through the pacemaker implantation can improve the symptoms; due to myocardial infarction and other primary pathologies caused by atrioventricular block patients should be treated for the primary pathology.
1. Asymptomatic isolated first degree atrioventricular block: usually no treatment is needed.
2. Symptoms such as syncope and PR interval greater than 300 ms: implantation of a dual-chamber pacemaker can improve the symptoms, but has no significant effect on the survival rate. If the first degree of AV block is combined with some neuromuscular diseases such as limb-girdle muscular dystrophy, permanent pacemaker implantation should be considered.
3. Myocardial infarction, digitalis intoxication and other primary diseases: the etiology of the primary disease should be treated. Myocardial infarction can be interventional or thrombolysis; digitalis poisoning should be discontinued, and if there are electrolyte disorders such as hypokalemia, potassium supplementation and other measures can be used to correct electrolyte disorders.
Sinus rhythm with one degree of atrioventricular block is defined as impulses transmitted down the sinoatrial node from the normal pacing point into the atria with delayed conduction of atrial impulses to the ventricles. The electrocardiogram of one degree of atrioventricular block is characterized by a PR interval of greater than 0.20 seconds.
First-degree AV block may be caused by disease, but some healthy individuals may also develop first-degree AV block due to increased tone of the vagus nerve. Patients are advised to choose the appropriate treatment according to their doctor’s advice.