Key result
Three cases of diastolic mitral regurgitation demonstrate that the condition is caused by a reversal in the atrioventricular gradient during diastole and requires careful echocardiographic analysis.
Case Report (n=3)
Careful echocardiographic analysis with simultaneous ECG is essential to accurately diagnose and delineate the timing of diastolic mitral regurgitation.
Diastolic mitral regurgitation (DMR) has been reported in patients with AV block, aortic regurgitation, cardiomyopathies, and in patients with long filling periods in atrial tachyarrhythmias. The mechanism for DMR is a reversal in the atrioventricular gradient during diastole. However, because of its relatively low velocity, it may be difficult to diagnose noninvasively. We present three different cases of diastolic MR in 2:1 second-degree AV block, atrial flutter, and dilated cardiomyopathy, with different locations in diastole. Diastolic tricuspid regurgitation commonly accompanies DMR. Careful analysis of echocardiographical images related with online ECG is very important in order to delineate systolic and DMR, and their timing in systole and diastole.
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Sisu et al. (2011) conducted a case report in Diastolic mitral regurgitation (n=3). Underlying cardiac conditions (AV block, atrial flutter, dilated cardiomyopathy) was evaluated on Mechanism and timing of diastolic mitral regurgitation. Three cases of diastolic mitral regurgitation demonstrate that the condition is caused by a reversal in the atrioventricular gradient during diastole and requires careful echocardiographic analysis.
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