UPDATED SCRIPT 2026 PRACTICE
SOLUTIONS GRADED A+
● What do normal heart sounds represent? Answer: The movement of
blood through the heart valves.
● What does the first heart sound (S1) indicate? Answer: The closure of
the tricuspid and mitral valves, marking the beginning of systole.
● What does the second heart sound (S2) indicate? Answer: The closure
of the aortic and pulmonic valves, marking the beginning of diastole.
● How are S1 and S2 best heard? Answer: With the diaphragm of the
stethoscope because they are high pitched.
● What is the significance of S3 heart sound? Answer: It is a low-
intensity vibration of the ventricular walls, may be normal in young
adults, but pathologic in left-sided heart failure or mitral valve
regurgitation.
● What does the S4 heart sound indicate? Answer: It is caused by atrial
contraction and is known as atrial gallop; may be normal in older adults
without heart disease.