What does the 5th Korotkoff sound indicate?

The 5th Korotkoff sound, which is characterized by a clear, distinct disappearance of sound when measured during a blood pressure assessment, indicates the diastolic blood pressure. This is the pressure in the arteries when the heart is at rest between beats. The Korotkoff sounds, which are the sounds observed through a stethoscope during blood pressure measurement, provide valuable information about the different phases of blood pressure—starting from when the heart is contracting (systolic) to when it is relaxed (diastolic).

The distinction of the 5th sound narrowing down to diastolic pressure is particularly important in accurately diagnosing blood pressure and understanding cardiovascular health. Knowing when these sounds occur allows clinicians to provide better patient care and manage conditions related to blood pressure more effectively. Proper interpretation of these sounds is crucial for accurate blood pressure readings, which can influence treatment decisions.