| 1. | The cause of congenital third-degree heart block in many patients is unknown.
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| 2. | In first-degree heart block, the diseased AV node conducts the electrical activity more slowly.
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| 3. | Cardiac arrhythmias can cause heart block, in which the contractions lose any useful rhythm.
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| 4. | Therefore, most of the important heart blocks are AV nodal blocks and infra-Hisian blocks.
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| 5. | After 48 hours, the monitor defined an indiscriminate heart block.
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| 6. | Mutations in emerin cause PR prolongation to complete heart block.
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| 7. | It can cause arrhythmias, heart block, even sudden cardiac death.
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| 8. | A very slow heart rate ( bradycardia ) may be associated with heart block.
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| 9. | Accidental intravenous overdose in an infant caused severe heart block, resulting in residual encephalopathy.
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| 10. | Isolated first-degree heart block has no direct clinical consequences.
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