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Related Concept Videos

Korotkoff Sounds01:12

Korotkoff Sounds

13.3K
Korotkoff sounds are the specific sounds heard while measuring blood pressure using a sphygmomanometer, typically with a stethoscope or a Doppler device. They are named after Russian physician Nikolai Korotkov, who first described them in 1905. These sounds correspond to turbulent blood flow in the artery as the blood pressure cuff is gradually released after inflation.
During blood pressure assessment, inflating the cuff 30 millimeters of mercury above the patient's systolic blood pressure...
13.3K
Special considerations while measuring blood pressure01:28

Special considerations while measuring blood pressure

1.5K
When assessing blood pressure (BP), healthcare professionals must consider various factors and potential unexpected outcomes to ensure accurate readings and provide proper patient care. Adhering to these guidelines is essential to achieving the most reliable results.
Monitoring Both Arms:
Monitoring BP in both arms during the initial assessment is advisable, as the systolic value may differ by five to ten mm Hg between arms. For subsequent BP assessments, use the arm with the higher reading.
1.5K
Cardiovascular System Abnormal Findings II: Auscultation01:25

Cardiovascular System Abnormal Findings II: Auscultation

858
Auscultation, an essential part of a heart examination, is done using a stethoscope. It provides crucial information about heart function and possible heart problems. Due to heart problems, abnormal sounds can be heard during systole or diastole. These sounds include S3 and S4 gallops, opening snaps, systolic clicks, and murmurs.
Abnormal Heart Sounds
Gallops:
858
Heart Sounds01:15

Heart Sounds

3.7K
Heart sounds are generated by the turbulence in blood flow due to the closing of heart valves. These sounds are best perceived slightly away from the valves, where the blood flow disseminates the sound.
Auscultation is the process of listening to these internal body sounds using a stethoscope. The heart produces four types of sounds, but only two—S1 and S2—can usually be heard with a stethoscope.
S1, also known as the "lub" sound, is caused by the closure of atrioventricular (A-V)...
3.7K
Measurement of Blood Pressure01:17

Measurement of Blood Pressure

4.0K
Assessing blood pressure is a standard procedure executed in virtually all medical environments. The method utilized today was established over a hundred years ago by an innovative Russian doctor, Dr. Nikolai Korotkoff. The soft ticking noise, known as Korotkoff sounds, heard while taking blood pressure readings results from turbulent blood flow within the vessels. The apparatus required for this procedure includes a sphygmomanometer, a blood pressure cuff attached to a gauge, and a...
4.0K
Cardiovascular System Abnormal Findings I: Inspection and Palpation01:29

Cardiovascular System Abnormal Findings I: Inspection and Palpation

1.3K
In a cardiovascular examination, inspection and palpation are crucial for identifying abnormalities.
Abnormal findings observed during an inspection
1.3K

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Related Experiment Video

Updated: May 4, 2026

Noninvasive Determination of Vortex Formation Time Using Transesophageal Echocardiography During Cardiac Surgery
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Noninvasive Determination of Vortex Formation Time Using Transesophageal Echocardiography During Cardiac Surgery

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Korotkoff sounds -- the improbable also occurs.

Bruno Estañol, Guillermo Delgado, Johannes Borgstein

    Arquivos Brasileiros De Cardiologia
    |December 18, 2013
    PubMed
    Summary

    Nikolai Korotkoff, an unexpected Russian surgeon, revolutionized clinical medicine by developing the noninvasive measurement of diastolic blood pressure. His groundbreaking work, akin to a scientific black swan, significantly advanced medical diagnostics.

    Area of Science:

    • Cardiovascular Physiology
    • Medical History
    • Clinical Diagnostics

    Background:

    • The clinical need for noninvasive diastolic blood pressure measurement was a long-standing challenge.
    • Numerous physiologists and clinicians attempted to develop such a method without success.

    Observation:

    • Nikolai Sergeevich Korotkoff, a young Russian army surgeon, unexpectedly devised a method for quantifying diastolic blood pressure.
    • His work occurred under challenging conditions during wartime.

    Findings:

    • Korotkoff's discovery provided the first effective noninvasive method for measuring diastolic blood pressure.
    • This achievement significantly impacted clinical medicine and diagnostic capabilities.

    Implications:

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    • The noninvasive measurement of diastolic blood pressure is now a cornerstone of clinical practice.
    • Korotkoff's discovery highlights how significant advancements can emerge from unexpected sources, challenging traditional research paradigms.