Does atrioventricular dissociation precede heart block?

AV dissociation. Atrioventricular dissociation can occur with or without heart block. For example, during ventricular tachycardia, the ventricular impulses are usually not going retrogradely to the atrium, so there is av dissociation without any heart block. The important thing is whether av dissociation is resulting in a ventricular rate slow enough to be symptomatic with dizziness or syncope.

Related Questions

Will atrioventricular dissociation lead to heart block?

Arrhythmia. Av dissociation is a disorder of conduction that in some cases (3rd degree av block) can lead to bradycardia (slow hr) and syncope. Read more...

Is it possible to fly far if I have heart block?

Depends on type. First degree av block-prolongation of the conduction time from atrium to ventricle. Mobitz i second degree block-progressive prolongation of the conduction time before a dropped beat. Mobitz ii second degree-sudden drop in conduction. Type 3 complete heart block (chb)-no communication between atrium and ventricle. Chb and mobitz ii requires immediate attention, others types stable and be follow. Read more...
Heart block. If the patient has mild, that is first degree av block, flying is ok. With second or third degree av block if the patient has the need for and has a pacemaker, should be ok to fly. If patient doesn't have the advanced av block corrected or protected, then flying carries significant risk. Read more...

Is a heart block a chronic disorder in the heart?

Arrhythmia. Heart block leading to a slowed heart rate can be acute, occurring secondary to external circumstances like increased vagal stimulation, low oxygen levels, or threatened coronary circulation. It can also be chronic occurring as a result of conduction system disease in patients with sleep apnea, myocardial scarring, aging, or infiltrative deposits. Read more...

How rare is it to be born with heart block?

Rare. Congenital heart block is a rare disorder. It has an incidence of about 1 in 22, 000 live births. It may be associated with high mortality and morbidity. It is often associated with neonatal lupus. Congenital heart block is frequently associated with underlying structural congenital heart disease. Decreased survival depends largely on presence of structural heart disease. Read more...

Life expectancy of person with heart block?

Depends. Life expectancy would depend on the type of heart block, the age at which occurring, the underlying etiology, the associated comorbiditiea, and the type of treatment. Read more...

How do you treat fetal heart block?

Not well. No good treatment for fetal heart block is known; Dexamethasone has been tried with poor results. Delivery at a tertiary care center with nicu and pediatric cardiology specialists is warranted and maternal-fetal medicine consultation is quintessential. The prognosis is much worse (almost lethal) if the complete fetal heart block occurs early and is associated with structural heart defect(s). Read more...