Which method is used in echocardiography to measure dP/dt?

The correct method to measure dP/dt in echocardiography is through the use of mitral regurgitation measurement. dP/dt represents the rate of change in pressure within the left ventricle during the isovolumetric contraction phase of the cardiac cycle. When significant mitral regurgitation is present, the Doppler velocity profile across the mitral valve can be utilized to assess the pressure gradient and determine dP/dt. The rapid rise in pressure corresponds to the acceleration of blood flow across the mitral valve, allowing for the calculation of this important index of myocardial contractility.

In contrast, the other methods listed do not specifically provide a direct measurement of dP/dt. Continuous wave Doppler primarily assesses blood flow velocities rather than pressure changes. Left ventricular mass assessment focuses on the structural aspect of the heart rather than dynamic pressure changes, and diastolic filling pattern analysis evaluates the filling characteristics of the heart rather than the contractile dynamics indicated by dP/dt. Thus, mitral regurgitation measurement is the most relevant and effective technique for quantifying dP/dt in clinical practice.