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  2. Heart block - Wikipedia

    en.wikipedia.org/wiki/Heart_block

    SA blocks rarely give severe symptoms, because even if an individual had complete block at this level of the conduction system (which is uncommon), the secondary pacemaker of the heart would be at the AV node, which would fire at 40 to 60 beats a minute, which is enough to retain consciousness in the resting state. However SA block is capable ...

  3. Third-degree atrioventricular block - Wikipedia

    en.wikipedia.org/wiki/Third-degree_atrio...

    The cause of congenital third-degree heart block in many patients is unknown. Studies suggest that the prevalence of congenital third-degree heart block is between 1 in 15,000 and 1 in 22,000 live births. [citation needed] Hyperkalemia in those with previous cardiac disease [8] and Lyme disease can also result in third-degree heart block. [9]

  4. Atrioventricular block - Wikipedia

    en.wikipedia.org/wiki/Atrioventricular_block

    The heart rate produced by the ventricles is much slower than that produced by the SA node. [1] Some AV blocks are benign, or normal, in certain people, such as in athletes or children. Other blocks are pathologic, or abnormal, and have several causes, including ischemia, infarction, fibrosis, and drugs.

  5. Wikipedia:Osmosis/Atrioventricular block - Wikipedia

    en.wikipedia.org/.../Atrioventricular_block

    Patients with complete heart block are usually symptomatic, with symptoms ranging from syncope, confusion, dyspnea, severe chest pain, and these patients are at risk of dying. When someone has AV block it’s important to find out the underlying cause and address it, for example it could be an adverse effect from a medication or from an infection.

  6. Lev's disease - Wikipedia

    en.wikipedia.org/wiki/Lev's_disease

    Lev's disease, also known as Lenegre disease, is an idiopathic disease that can result in a complete heart block, or an extremely slowed heart rate, in patients with this condition. It is thought that for certain patients, this impairment of heart's electrical conduction system is due to fibrosis and calcification of conduction cells.

  7. Complete heart block - Wikipedia

    en.wikipedia.org/?title=Complete_heart_block&...

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