What is typically represented just after the closure of the aortic valve?

The incisura of the pressure wave, also known as the dicrotic notch, is typically represented just after the closure of the aortic valve. This particular feature appears on the arterial pressure waveform as a brief dip that occurs immediately following the peak systolic pressure. The closure of the aortic valve marks the end of ventricular systole and signifies the transition to diastole, during which the pressure in the aorta begins to fall. The incisura results from the sudden change in aortic pressure and volume as the valve closes, creating a momentary fluctuation before the pressure continues to decline.

Recognizing the incisura is crucial for understanding the hemodynamic changes that occur during the cardiac cycle, especially how they relate to valve function and the dynamics of blood flow. This concept is fundamental in echocardiography and helps clinicians assess the cardiac and vascular health of patients.