Innocent Murmurs

Question 1

What are the 3 type of innocent murmurs heard in children?

Answer 1

• Ejection murmurs
• Venous hums
• Still’s murmur

Question 2

What are ejection murmurs due to?

Answer 2

Due to turbulent blood flow at the outflow tract of the heart

Question 3

What are venous hums due to?

Answer 3

Due to the turbulent blood flow in the great veins returning to the heart. Heard as a continuous blowing noise heard just below the clavicles

Question 4

What is Still’s Murmur due to?

Answer 4

Low-pitched sound heard at the lower left sternal edge

Question 5

What are the characteristics of an innocent ejection murmur?

Answer 5

• Soft-blowing murmur in the pulmonary area
• Short buzzing murmur in the aortic area
• May vary with posture
• Localised with no radiation
• No diastolic component
• No thrill
• No added sounds (e.g. clicks)
• Asymptomatic child
• No other abnormality