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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)...

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.

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:

Assessment of apical pulse

Assessment of apical pulse

Assessing the Apical Pulse
Assessing the apical pulse is a critical nursing procedure, particularly indicated for:

Assessing Blood pressure using a doppler ultrasound

Assessing Blood pressure using a doppler ultrasound

To obtain accurate blood pressure measurements in clinical settings, especially when traditional methods are insufficient, healthcare professionals utilize the Doppler ultrasound technique. This method uses high-frequency sound waves to detect blood flow within the arteries, which is crucial for patients with conditions that complicate circulatory system assessment.
Pre-Procedural Guidelines for Doppler Ultrasound Blood Pressure Assessment:
Preparation of Equipment:

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Related Experiment Video

Updated: Jul 24, 2025

Anatomically Realistic Neonatal Heart Model for Use in Neonatal Patient Simulators

Anatomically Realistic Neonatal Heart Model for Use in Neonatal Patient Simulators

Published on: February 5, 2019

Amplification of Heart Sounds Using Digital Stethoscope in Simulation-Based Neonatal Resuscitation.

Anirudha Das¹, Kim Adams¹, Shelagh Stoicoiu¹

¹Department of Neonatology, Cleveland Clinic Children's Hospital, Cleveland, Ohio.

American Journal of Perinatology

|July 3, 2023

Summary

A digital stethoscope significantly improved heart rate (HR) documentation and recognition of HR changes during neonatal resuscitation compared to traditional methods. This enhanced method also led to greater provider satisfaction.

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Last Updated: Jul 24, 2025

Anatomically Realistic Neonatal Heart Model for Use in Neonatal Patient Simulators

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Published on: February 5, 2019

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Published on: April 7, 2023

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Hemodynamic Precision in the Neonatal Intensive Care Unit using Targeted Neonatal Echocardiography

Published on: January 27, 2023

Area of Science:

Neonatal resuscitation
Medical device technology
Cardiology

Background:

Current methods for determining heart rate (HR) during neonatal resuscitation have limitations in accuracy, timeliness, and reliability.
Assessing HR is critical for effective neonatal resuscitation, guiding treatment decisions.

Purpose of the Study:

To compare the accuracy, timeliness, and reliability of three methods for heart rate assessment in neonatal resuscitation.
To evaluate the effectiveness of a digital stethoscope with amplified heart sounds against traditional methods.

Main Methods:

A simulated crossover experiment was conducted using a high-fidelity manikin.
Three teams, each comprising a physician, nurse, and respiratory therapist, performed simulated neonatal resuscitations.
Three methods were compared: traditional stethoscope, electrocardiogram with traditional stethoscope, and a digital stethoscope with loudspeaker amplification.

Main Results:

The digital stethoscope group demonstrated significant improvements in the time to first HR recording (p < 0.001) and the total number of HR recordings (p < 0.001).
Time to recognize HR dips was also significantly improved with the digital stethoscope (p = 0.009).
Provider satisfaction was higher when using the digital stethoscope.

Conclusions:

The use of a digital stethoscope with amplification enhances the documentation of heart rate during neonatal resuscitation.
This technology facilitates earlier recognition of critical heart rate changes, improving patient management.
The digital stethoscope offers a more satisfactory experience for healthcare providers involved in neonatal resuscitation.