Author Question: On an atrial pressure tracing, which wave corresponds to atrial diastole? a. a wave c. R wave b. ... (Read 56 times)

lunatika · **on:** Jul 16, 2018

On an atrial pressure tracing, which wave corresponds to atrial diastole?

a. a wave c. R wave
b. c wave d. P wave

Question 2

A phonocardiogram is used to detect which of the following heart sounds?

a. S1 and S2 c. S3 and S4
b. S2 and S3 d. S1 and S4

zacnyjessica · **Reply #1 on:** Jul 16, 2018

Answer to Question 1

ANS: B
The c wave occurs at the beginning of atrial diastole and coincides with the period of ventricular systole and is associated with a transient increase in atrial pressure as the pressure in the ventricle increases and forces the closed atrioventricular valves backward into the atrial chamber.

Answer to Question 2

ANS: C
S3 and S4 are not typically heard with a stethoscope, but these sounds can be amplified and rec-orded graphically with a phonocardiogram.