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Korotkoff Sounds

Korotkoff Sounds

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...

Heart Sounds

Heart Sounds

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)...

Cardiovascular System Abnormal Findings II: Auscultation

Cardiovascular System Abnormal Findings II: Auscultation

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:

Imbalances in Cardiac Output

Imbalances in Cardiac Output

The heart's primary function is to pump blood throughout the body, maintaining a balance between blood sent out (cardiac output) and blood returning (venous return). If this balance is disrupted, it can result in congestive heart failure (CHF), a severe condition where the heart becomes an inefficient pump, leading to inadequate blood circulation.
CHF can occur due to the failure of either side of the heart. Left-side failure leads to pulmonary congestion—the right side continues to send...

Assessment of the Cardiovascular System IV: Auscultation

Assessment of the Cardiovascular System IV: Auscultation

Cardiac auscultation is a clinical skill used to assess heart function and detect abnormalities. It involves listening to heart sounds at specific anatomical locations through a stethoscope.
Normal Heart Sounds
S1 (First Heart Sound)-
S1 is made by the closure of the mitral and tricuspid valves (atrioventricular valves), marking the beginning of systole.
S2 (Second Heart Sound)-
S2 is made by the closure of the aortic and pulmonic valves (semilunar valves), marking the end of the systole.

Cardiac Action Potential

Cardiac Action Potential

Cardiac action potentials are essential for proper heart function, enabling the rhythmic contractions needed for adequate blood circulation. Nodal cells and Purkinje fibers, specialized for electrical conduction, generate these action potentials.
The cardiac action potential process involves a series of phases characterized by the movement of ions across the cardiac cell membranes, leading to the depolarization and repolarization of the cardiac myocytes.
Ionic Basis of Cardiac Action Potentials

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Related Experiment Video

Updated: Aug 29, 2025

Quantification of Mouse Heart Left Ventricular Function, Myocardial Strain, and Hemodynamic Forces by Cardiovascular Magnetic Resonance Imaging

Quantification of Mouse Heart Left Ventricular Function, Myocardial Strain, and Hemodynamic Forces by Cardiovascular Magnetic Resonance Imaging

Published on: May 24, 2021

Korotkoff sounds dynamically reflect changes in cardiac function based on deep learning methods.

Wenting Lin¹, Sixiang Jia¹, Yiwen Chen¹

¹Department of Cardiology, The Fourth Affiliated Hospital, Zhejiang University School of Medicine, Yiwu, China.

Frontiers in Cardiovascular Medicine

|September 12, 2022

Summary

This summary is machine-generated.

Korotkoff sounds (K-sounds) are a century-old standard for blood pressure measurement. This study explores using deep learning with K-sounds to detect heart failure early, improving cardiovascular disease diagnosis.

Keywords:

Korotkoff sounds cardiac function deep learning heart failure prediction

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Last Updated: Aug 29, 2025

Quantification of Mouse Heart Left Ventricular Function, Myocardial Strain, and Hemodynamic Forces by Cardiovascular Magnetic Resonance Imaging

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Area of Science:

Cardiology and Medical Diagnostics
Artificial Intelligence in Healthcare
Biomedical Signal Processing

Background:

Korotkoff sounds (K-sounds) are the established gold standard for blood pressure measurement.
Current K-sound efficacy has limitations, despite their role in cardiovascular disease diagnosis.
Increasing heart failure (HF) incidence demands improved pre-hospital screening methods.

Purpose of the Study:

To propose a novel deep learning (DL) method for cardiovascular diagnostics.
To investigate the potential of K-sounds for predicting cardiac function changes.
To enable early detection of cardiac dysfunctions using an accessible screening tool.

Main Methods:

Review of existing literature on Korotkoff sounds and their clinical applications.
Proposal of a deep learning framework for analyzing K-sound signals.
Exploration of K-sound characteristics indicative of altered cardiac function.

Main Results:

Identified limitations in traditional K-sound auscultation for complex cardiac conditions.
Demonstrated the theoretical feasibility of DL models in interpreting K-sound nuances.
Highlighted the potential for K-sounds, when analyzed by DL, to detect subtle cardiac changes.

Conclusions:

Deep learning offers a promising avenue to enhance the diagnostic capabilities of K-sounds.
K-sound analysis via DL could facilitate rapid, pre-hospital screening for cardiac dysfunction.
This approach may lead to earlier detection and management of heart failure and other cardiovascular diseases.