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Conduction: Difference between revisions
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|nextname=Step 4: Learn how to determine the heart axis | |nextname=Step 4: Learn how to determine the heart axis | ||
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[[Image:QRSwaves.jpg|thumb]] | |||
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==The PQ interval== | ==The PQ interval== | ||
The PQ interval starts at the beginning of the atrial contraction and ends at the beginning of the ventricular contraction. | The PQ interval starts at the beginning of the atrial contraction and ends at the beginning of the ventricular contraction. | ||
[[Image:PR_interval_buildup.svg|thumb|The PR duration depends on the conduction velocity in the atria, AV node, His bundle, bundle branches and Purkinje fibers.]] | [[Image:PR_interval_buildup.svg|thumb|The PR duration depends on the conduction velocity in the atria, AV node, His bundle, bundle branches and Purkinje fibers.]] | ||