Timing and Shape

1. When in the cycle does the AR murmur begin, and what is its shape?

ANS: It begins with the aortic component of the second sound (A2). In general, it is decrescendo.

Note: There is often a very early and very short crescendo-decrescendo to the murmur if the AR is not more than moderate.

Systolic and diastolic murmurs t t

Second right

Interspace

To-and-fro murmurs

This murmur was due to mild syphilitic AR. It was loudest at the second and third right interspaces. Note the slight early crescendo-decrescendo. A systolic murmur due to blood going in one direction, together with a diastolic murmur due to blood going in the opposite direction, is called a to-and-fro murmur.

Systolic and diastolic murmurs t t

Second right

Interspace

To-and-fro murmurs

2. What is the auscultatory effect on the short and early crescendo-decrescendo? ANS: The murmur appears to start after a short silent period following the A2. The background rhythm effect is as follows:

1-2-HAaaaaa-1-2-HAaaaaa

Was this article helpful?

0 0
Blood Pressure Health

Blood Pressure Health

Your heart pumps blood throughout your body using a network of tubing called arteries and capillaries which return the blood back to your heart via your veins. Blood pressure is the force of the blood pushing against the walls of your arteries as your heart beats.Learn more...

Get My Free Ebook


Post a comment