1. The first type of second-degree block is more serious than the second type because bradycardia is less likely to be present and because cardiac output is less likely to be seriously decreased in a...

1. The first type of second-degree block is more serious than the second type because bradycardia is less likely to be present and because cardiac output is less likely to be seriously decreased in a second-degree type I block.

a. True b. False

2. AV sequential pacemakers stimulate only the atria.