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Bradycardia: Difference between revisions
→First Degree AV Block
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==AV-Block== | ==AV-Block== | ||
===First Degree AV Block=== | ===First Degree AV Block=== | ||
Technically | Technically an AV-delay and not a AV block, 1st degree AV block is defined as a prolonged interval between atrial and ventricular activation (>200ms). This delay results from disease in the AV-node or His-Purkinje system. An AV block is not the cause of bradycardia, because every atrial impulse results in conduction to the ventricles. | ||
===Second Degree AV Block=== | ===Second Degree AV Block=== | ||
The second degree AV block can be divided in two separate entities depending on the clinical characteristics of the conduction disorder. If conduction to the ventricle is conducted in a 2:1 fashion; that is if after every second P-wave there is no conduction to the ventricle, it is not possible to distinguish between the two types and a severe kind of conduction block should be assumed. If two sequential P-wave are not followed by a QRS-complex the term malignant block is used, as this could lead to or be an indication of a total block. | The second degree AV block can be divided in two separate entities depending on the clinical characteristics of the conduction disorder. If conduction to the ventricle is conducted in a 2:1 fashion; that is if after every second P-wave there is no conduction to the ventricle, it is not possible to distinguish between the two types and a severe kind of conduction block should be assumed. If two sequential P-wave are not followed by a QRS-complex the term malignant block is used, as this could lead to or be an indication of a total block. | ||