heart sounds`

Question 1

S3 and S4 occur early/late in diastole/systole

Answer 1

S3 = early in diastole
S4 = late in diastole

Question 2

S3 and S4 reasoning

Answer 2

S3 = from a sudden deceleration of blood flow into left ventricle from the left atrium
- benign in some children & trained athletes but can be indicative of congestive heart failure later in life

S4 = in ventricular non-compliance (ex. hypertrophy)

Question 3

1. ventricular relaxation/atrial contraction = systole or diastole
2. ventricular contraction /atrial relaxation = systole or diastole

Answer 3

1. diastole
2. systole

Question 4

1. after mitral valve closes, before aortic valve opens
2. period b/w aortic valve close and mitral opening

Answer 4

1. isovolumetric CONTRACTION
2. isovolumetric RELAXATION