A. Schematic representation of ECG, aortic pressure (AOP), left ventricular pressure (LVP), and left atrial pressure (LAP). The gray areas indicated a transvalvular pressure difference during systole. HSM, holosystolic murmur; MSM, midsystolic murmur. B. Graphic representation of ECG, AOP, LVP, and LAP with gray areas indicating transvalvular diastolic pressure difference. EDM, early diastolic murmur; MDM, middiastolic murmur; PSM, presystolic murmur.