![]() ![]() Teaching Tip: It is easier to hear the different intensities of the normal beat and post PVC murmur by listening to the post PVC murmur and then the murmur associated with the subsequent normal beat. It decreases the regurgitant flow across the mitral valve as more blood flows forward with the decrease in afterload, decreasing the intensity of the MR murmur. This increases the flow across the aortic valve leading to an increase in AS murmur intensity. With a longer time between beats, there is increased filling, increased contractility and decreased afterload. You can also distinguish between AS and MR by changes in intensity after changes in cycle length. Murmur Analysis with Dynamic Auscultation
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