Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

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:

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) valves at the...

Mitral Stenosis II: Clinical features and Diagnostic Tests

Mitral Stenosis II: Clinical features and Diagnostic Tests

Mitral stenosis is a heart condition in which the mitral valve, which allows blood to flow from the left atrium to the left ventricle, becomes narrowed or stenotic. This narrowing hinders blood flow and leads to clinical symptoms requiring specific medical evaluations and management strategies. The following overview outlines the clinical symptoms, assessments, diagnostic findings, prevention methods, and treatments for mitral stenosis.Clinical ManifestationsDyspnea (shortness of breath): This...

Mitral Regurgitation II: Clinical Features and Diagnostic Tests

Mitral Regurgitation II: Clinical Features and Diagnostic Tests

Mitral regurgitation (MR) is a valvular heart disorder in which the mitral valve fails to close tightly, allowing blood to leak backward into the heart. Understanding the clinical manifestations, assessment, diagnostic findings, and medical management of MR is crucial to effectively managing affected patients.Clinical Manifestations of Mitral RegurgitationMitral regurgitation can be acute or chronic, each presenting differently and requiring different approaches:1. Acute Mitral...

Mitral Regurgitation I: Introduction

Mitral Regurgitation I: Introduction

Mitral regurgitation is characterized by the backward circulation of blood from the left ventricle to the left atrium during systole, a phase of the cardiac cycle when the heart contracts and pumps blood out of the chambers. This abnormal flow occurs primarily due to the dysfunction of the mitral valve or its supporting structures, which include the mitral leaflets, chordae tendineae, annulus, and papillary muscles.Etiology and Mechanisms:Primary Mitral Regurgitation: This type arises from...

Aortic Regurgitation II: Clinical Features and Diagnostic Tests

Aortic Regurgitation II: Clinical Features and Diagnostic Tests

Aortic valve regurgitation (AR) occurs when the aortic valve fails to close properly, allowing blood to flow backward from the aorta into the left ventricle. This backflow can result in two distinct clinical presentations: acute and chronic AR, each characterized by its own set of symptoms and physical findings.Acute Aortic RegurgitationAcute AR presents with a sudden onset of severe symptoms. Patients typically experience profound dyspnea (shortness of breath), chest pain, and signs of left...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Third heart sound detection using wavelet transform-simplicity filter.

Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference·2007

Same author

Systematic review of postoperative complications in patients with inflammatory bowel disease treated with immunomodulators.

The British journal of surgery·2006

Same author

Systematic review: adipose tissue, obesity and gastrointestinal diseases.

Alimentary pharmacology & therapeutics·2006

Same author

The correlation between colorectal cancer rates of proliferation and apoptosis and systemic cytokine levels; plus their influence upon survival.

British journal of cancer·2006

Same author

Production of 24 transferable embryos in one flush by a Garole microsheep.

The Veterinary record·2006

Same author

Cytoprotective and antioxidant activity of Rhodiola imbricata against tert-butyl hydroperoxide induced oxidative injury in U-937 human macrophages.

Molecular and cellular biochemistry·2005

Search research articles

Related Experiment Video

Updated: Jun 26, 2026

Ultrasonic Assessment of Myocardial Microstructure

Ultrasonic Assessment of Myocardial Microstructure

Published on: January 14, 2014

Heart murmur recognition and segmentation by complexity signatures.

D Kumar¹, P Carvalho, M Antunes

¹Centre for Informatics and Systems, University of Coimbra, Portugal. dinesh@dei.uc.pt

Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference

|January 24, 2009

Summary

This study presents a novel algorithm for identifying heart murmurs by analyzing the chaotic behavior of heart sounds using nonlinear dynamics. The method accurately detects murmurs, aiding in early heart disorder assessment.

More Related Videos

Oxygenation-sensitive Cardiac MRI with Vasoactive Breathing Maneuvers for the Non-invasive Assessment of Coronary Microvascular Dysfunction

Oxygenation-sensitive Cardiac MRI with Vasoactive Breathing Maneuvers for the Non-invasive Assessment of Coronary Microvascular Dysfunction

Published on: August 17, 2022

Related Experiment Videos

Last Updated: Jun 26, 2026

Ultrasonic Assessment of Myocardial Microstructure

Ultrasonic Assessment of Myocardial Microstructure

Published on: January 14, 2014

Oxygenation-sensitive Cardiac MRI with Vasoactive Breathing Maneuvers for the Non-invasive Assessment of Coronary Microvascular Dysfunction

Oxygenation-sensitive Cardiac MRI with Vasoactive Breathing Maneuvers for the Non-invasive Assessment of Coronary Microvascular Dysfunction

Published on: August 17, 2022

Area of Science:

Cardiology
Biomedical Signal Processing
Nonlinear Dynamics

Background:

Heart sound analysis offers early detection of cardiac disorders by reflecting mechanical heart activity.
Heart murmurs are a common indicator of various heart conditions, often appearing before symptoms manifest.
Assessing heart sounds is crucial for diagnosing and monitoring cardiovascular health.

Purpose of the Study:

To introduce an innovative algorithm for accurate heart murmur identification.
To leverage nonlinear dynamics and phase space reconstruction for analyzing heart sound signals.
To improve the early detection and characterization of heart disorders.

Main Methods:

The proposed algorithm analyzes the chaotic behavior of heart sounds using nonlinear dynamics.
Heart sound signals are transformed into a phase space and reconstructed using an embedded matrix for segmentation.
Signal complexity and strength are computed in the phase space to locate sound component boundaries.

Main Results:

The algorithm demonstrated high performance in identifying heart murmurs.
Achieved a sensitivity of 91.09% and a specificity of 95.25% on a diverse heart sound database.
Successfully segmented murmurs from other heart sound components.

Conclusions:

The developed algorithm effectively identifies heart murmurs based on nonlinear dynamics.
This method provides a robust tool for heart sound analysis and cardiac disorder assessment.
The high accuracy suggests potential for clinical application in pre-symptomatic diagnosis.