Audible atrial sounds in atrial flutter modulating an aortic regurgitant murmur. Echocardiographic and phonocardiographic correlates.

The findings in a patient with atrial flutter whose audible atrial sounds uniquely modulated an aortic regurgitant murmur are presented, with phonocardiographic and echocardiographic correlates, which suggest a ventricular origin for these sounds.