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I know generally what the answer to your question is but with further investigation I think you could find a more complete/ simpler explanation. The first korotkoff sound (pulse sound) is the point at which blood pressure in the vessel exceeds the pressure of the BP cuff. At this point a turbulent flow of blood manages to pass through the pressurized area thus giving you your first audible sound. As you may know already systole is when the heart contracts, pumping blood into the aorta and into the body because of the sudden influx of blood into the body pressure suddenly jumps, so the sound you hear essentially is the result of an opposing force. I hope that is the answer you were looking for.
What else can I help you with?
When taking blood pressure the first tapping sound heard is recorded is the first sound systolic or diastolic?
systolic
When blood pressure cuff is deflating the first tapping sound is?
Systolic
Systolic is measured at which korotkoff?
The systolic pressure is measured at the first Karotkoff sound (stage I), it is the first tapping noise that you hear with a stethoscope when taking a manual blood pressure.
When the blood pressure cuff is deflated the last tapping sound is the?
diastolic pressure
How do you read the sphygmomanometer?
To read a sphygmomanometer, first inflate the cuff until the gauge reads around 180 mmHg. Then, slowly release the pressure while listening for the first and last sounds, which indicate the systolic and diastolic blood pressure values. Note these values as your reading.
When are the sounds of korotkoff heard?
The sounds of Korotkoff are heard when taking blood pressure measurements using a sphygmomanometer. The first sound is heard when measuring systolic pressure as the cuff pressure falls below the pressure in the brachial artery, and the last sound is heard when measuring diastolic pressure as the cuff pressure continues to decrease.
Do you think that pulse measurement can replace stethoscope in determining diastolic pressure?
No. The sound that is heard is generated by turbulent flow when blood overcomes the pressure of the cuff (at the systolic point), but collapses because the cuff pressure exceeds the diastolic pressure. One the cuff is below the systolic pressure, there will be a pulse.
What causes the systolic sound?
the systolic sound is caused by ventricular contraction
What causes disappearance of systolic sound?
There will be no systolic sound if blood is flowing freely. This occurs when there is no measurable constriction of an artery.
How are pressure changes associated with sound?
Scroll down to related links and look at "Sound pressure - Wikipedia".
When taking blood pressure what is the first distinct and rhythmic sound heard?
The sounds heard while measuring blood pressure in this way are called the Korotkoff sounds, and undergo 5 phases: # initial 'tapping' sound (cuff pressure = systolic pressure) # sounds increase in intensity # sounds at maximum intensity # sounds become muffled # sounds disappear
Does the amplitude of the qrs complex change with the pulse amplitudes?
Yes, the QRS complex and the pulse wave are directly connected. The amplitude of these, combined with the first heart beat sound, make up systolic pressure.
