Sympathetic nervous system Right Ans - releases epi
increased HR, BP and CO
Automaticity Right Ans - cells ability to spontaneously generate
impulse
What does the P wave represent Right Ans - atria depolarization
What does the QRS represent Right Ans - ventricular
depolarization
What does the T wave represent Right Ans - ventricular
repolarization
A delay in conduction from the SA node to the AV node causes what?
Right Ans - prolonged PR interval
What is the rate of the AV node Right Ans - 40-60
What is the rate of the SA node Right Ans - 60-100 (pace maker
cell) slows everything down
How long is a normal PR interval Right Ans - .12-.2 s
How long is a normal QRS interval Right Ans - less than .12
How many seconds does a tiny box represent Right Ans - 0.04 s
How many small boxes make up .2 seconds Right Ans - 5 small
When is cardiac output delivered Right Ans - ST segment