MICROANATOMY

Detailed explanation-1: -As shown in Figure 3, the first sound heard through the stethoscope-the first Korotkoff sound-indicates systolic pressure. As more air is released from the cuff, blood is able to flow freely through the brachial artery and all sounds disappear.

Detailed explanation-2: -This first sound is the systolic blood pressure, the point when doctors or nurses check the gauge or meter for a reading. It’s the 120 if your blood pressure is 120 over 80. It represents the heart contracting, pushing the blood out against the artery in that arm.

Detailed explanation-3: -The first Korotkoff sounds occur when the systolic pressure, the highest pressure reached when the ventricles contract and eject blood, first exceeds the pressure in the cuff so that blood once again flows through the artery beneath the stethoscope.

Detailed explanation-4: -The Korotkoff sounds are the loud thumping sounds you’ll hear through the stethoscope while deflating the sphygmomanometer. Systolic blood pressure is indicated by the first Korotkoff sound that is heard. Diastolic blood pressure is indicated after all Korotkoff sounds have been heard through the stethoscope.

Detailed explanation-5: -Systolic and diastolic blood pressure Traditionally, the systolic blood pressure is taken to be the pressure at which the first Korotkoff sound is first heard and the diastolic blood pressure is the pressure at which the fourth Korotkoff sound is just barely audible.