Determining the ventricular contraction rate

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AV block refers to a condition where there is a longer-than normal conduction delay at the AV node. There are different degrees of AV block. Sometimes conduction is only slightly delayed, and sometimes conduction is blocked entirely. Which of the following will not be observed in someone with AV block (of any severity).

-Atrial contraction rate is slower than ventricular contraction rate.

-Atrial and ventricular systole occur at the same time.

-Atria repolarize before ventricular contraction begins.

-Ventricular contraction does not always follow atrial contraction.

Why is 1 correct and the rest of them incorrect?

Reference no: EM132497407

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