1
Adult CCRN® Exam 2025/2026 | Complete Exam with
Verified Questions and 100% Correct Answers
What is S1 in heart sounds? - (ANSWER)S1, or 'Lub', is caused by the closure of
the AV (mitral and tricuspid) valves, is loudest at the apex of the heart
(midclavicular, 5th intercostal space), and marks the end of diastole and the
beginning of systole.
What is S2 in heart sounds? - (ANSWER)S2, or 'Dub', is caused by the closure of
the semilunar (aortic and pulmonic) valves, is loudest at the base of the heart
(right sternal border, 2nd intercostal space), and marks the end of systole and the
beginning of diastole.
S2 splits on inspiration; wide, fixed splitting of S2 - (ANSWER)can be caused by
right bundle branch block (RBBB).
How does S2 relate to pulmonary embolism? - (ANSWER)S2 is louder with a
pulmonary embolism.
What are the auscultatory points for heart valves? - (ANSWER)Each of the 4 heart
valves has an auscultatory point: Aortic area (2nd ICS, right sternal border),
Pulmonic area, Erb's point, Tricuspid area, and Mitral (apical) area (5th ICS,
midclavicular).
What is S3 in heart sounds? - (ANSWER)S3 is caused by a rapid rush of blood into
a dilated ventricle, occurs early in diastole right after S2, and is best heard at the
Adult CCRN® Exam 2025/2026 | Complete Exam with
Verified Questions and 100% Correct Answers
What is S1 in heart sounds? - (ANSWER)S1, or 'Lub', is caused by the closure of
the AV (mitral and tricuspid) valves, is loudest at the apex of the heart
(midclavicular, 5th intercostal space), and marks the end of diastole and the
beginning of systole.
What is S2 in heart sounds? - (ANSWER)S2, or 'Dub', is caused by the closure of
the semilunar (aortic and pulmonic) valves, is loudest at the base of the heart
(right sternal border, 2nd intercostal space), and marks the end of systole and the
beginning of diastole.
S2 splits on inspiration; wide, fixed splitting of S2 - (ANSWER)can be caused by
right bundle branch block (RBBB).
How does S2 relate to pulmonary embolism? - (ANSWER)S2 is louder with a
pulmonary embolism.
What are the auscultatory points for heart valves? - (ANSWER)Each of the 4 heart
valves has an auscultatory point: Aortic area (2nd ICS, right sternal border),
Pulmonic area, Erb's point, Tricuspid area, and Mitral (apical) area (5th ICS,
midclavicular).
What is S3 in heart sounds? - (ANSWER)S3 is caused by a rapid rush of blood into
a dilated ventricle, occurs early in diastole right after S2, and is best heard at the
