Structure
A recording of the hearts electrical activity is referred to as a(n)__________.
What is electrocardiogram? or EKG
The average heart beats about _______ times per minute?
What is 60-100
The protective layer (sac) around the heart is known as the __________
What is pericardium
The EKG wave that results from contraction of the atria is the _________.
What is the P wave?