Heart Sounds Flashcards
1
Q
During each cardiac cycle how many sounds are heard?
A
First → low, slightly prolonged
Second → shorter
2
Q
What is the first sound caused by?
A
Closure of the mitral and tricuspid valves at the start of ventricular systole
3
Q
What is the second sound caused by?
A
Closure of the aortic and pulmonary valves at the end of the ventricular systole
4
Q
What is the heart beat?
A
60-90 beats/min
5
Q
What is bradycardia?
A
The heart rate below 60 beats / min
6
Q
What is tachycardia?
A
Heart rate above 90 beats/min
