Match Each Term to Its Definition

Match each term to its definition.
-​The first part of the cardiac cycle

A) ​artifacts
B) ​atrial depolarization
C) ​cardiology
D) ​countershock
E) ​current
F) echoes​
G) ​impulse
H) ​intermittent
I) ​interpretive
J) ​interval
K) ​limbs
L) ​mechanical
M) ​multichannel
N) ​precordial
O) ​reliable
P) ​sedentary
Q) ​segment
R) ​simultaneous
S) ​standardization
T) ​trace
U) ​voltage