av block造句

• In 1905 he identified a form of second degree AV block.
• Mobitz Type 2 AV block is another indication for pacing.
• It is also associated with cardiac disturbances including AV block.
• The definitive treatment for this form of AV Block is an implanted pacemaker.
• The clinical relevance pertaining to AV blocks is greater than that of sinoatrial blocks.
• Strong vagal stimulation may also produce AV block.
• Pathological causes include sinus bradycardia, sinus arrest, sinus exit block, or AV block.
• Third-degree AV block can be treated by use of a dual-chamber artificial pacemaker.
• This is different from an AV block, which occurs in the AV node and delays ventricular depolarization.
• In first-degree AV block, the impulse conducting from incidence is 0.13 per 1000 persons.
• This form is identical to the type of AV block described by Hay in 1906 without the bene
  鹴 of electrocardiography.
• Certain AV blocks can also be found as normal variants, such as in athletes or children, and are benign.
• In 1924, Mobitz differentiated two types of second degree AV block with the aid of the electrocardiogram and characterized their prognostic signi
  鹀ance.
• It could be shown that this duration is on average about 70 ms in patients with AV block and unimpaired left ventricular function.
• This form is identical to the previously described type of second-degree AV block by Wenckebach at the end of the nineteenth century.
• "' Second-degree atrioventricular block "'( AV block ) is a disease of the electrical conduction system of the heart.
• If not, AV nodal blocking maneuvers will not work, although transient AV block is still useful as it may unmask an underlying abnormal rhythm.
• Note that this is quite different from the Wenckebach AV block, in which the PR interval gets progressively longer, before the dropped QRS segment.
• The medical significance of this type of AV block is that it may progress rapidly to complete heart block, in which no escape rhythm may emerge.
• Patients with third-degree AV block typically experience severe bradycardia ( an abnormally-low measured heart rate ), hypotension, and at times, hemodynamic instability.